Showing 152 items
matching glass lens
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The Cyril Kett Optometry Museum
Equipment - Ophthalmoscope, unknown, Liebreich ophthalmoscope, cased, 1875 (estimated); late 19th century
... lenses and 2 glass condensing lenses. Non-illuminated... light; glass mirrors were introduced in 1870. A condensing lens ...Richard Liebreich of Germany invented his design of ophthalmoscope in 1855. This example is complete in its case with Coccius lenses and condensing lenses. Early ophthalmoscopes required an external source of illumination, eg lamp or candle, and light was reflected into the eye to be examined by the mirror on the ophthalmoscope. The earliest versions of the Liebreich ophthalmoscope used a polished metal surface to reflect light; glass mirrors were introduced in 1870. A condensing lens was held in front of the patient to view the image. A Coccius lens could be clipped into the holder to counter ametropia of user or subject.This Liebreich ophthalmoscope is significant for the collection as it is the only complete example of the three held in the collection.Cased Liebreich ophthalmoscope with 5 small coccius glass lenses and 2 glass condensing lenses. Non-illuminated ophthalmoscope has concave mirror in round head with central sight hole.Hinged coccius clip attached to hold lenses. Black metal head, silver coloured mount and black turned timber handle. Case has black leather outer lining and purple velvet and satin inner linings. Case hinged with snap closure. On front of case:"LIEBREICH'S OPHTHALMOSCOPE" 4 of 5 Coccius lenses engraved with powers: "8-", "12-", "-01", "+01"ophthalmoscope, optometry, ophthalmology, liebreich, coccius, lenses, eye examination, fundus, funduscopy, non illuminated, instrument, eye doctor, liebreich ophthalmoscope -
Flagstaff Hill Maritime Museum and Village
Lamp
... Starboard side light with fresnal glass lens with removable... light with fresnal glass lens with removable blue/green filter ...Starboard side light with fresnal glass lens with removable blue/green filter, oil/kero burner with reflector inside. Made by "Tung Woo Hong Kong No. S1477", rounded front and 2 flat sides, bracket on one side for hanging. H 57.5cm x D 35cm.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, lamp, starboard side light -
Numurkah & District Historical Society
Bike Lamp - Kerosene
... black. Silver round edging surrounding a glass lens. Protruding... a glass lens. Protruding from the side is a small triangular shape ...Kerosene Lamp for a bike. Tin rectangular shape painted black. Silver round edging surrounding a glass lens. Protruding from the side is a small triangular shape with a red lens facing back. Also at the back is spring bracket used for mounting the lamp on the bike. One side also has a regulator dial. bike, bicycle, lamp -
Flagstaff Hill Maritime Museum and Village
Functional object - Kerosene Lamp, 1950s to 1984
... to the magnification of the Fresnel glass lens. This lamp in our collection... holes around it. A clear glass Fresnel 360-degree lens covers... miles away due to the magnification of the Fresnel glass lens ...The Kerosene lamp was one of the most common oil lamps used and was manufactured until the 1980s. The Anchor Lamp design was used for marine purposes in the days of sailing ships when a ship at anchor or sailing in the dark was required to display a white light on the top of its main mast. The Anchor Lamp's top loop was for a rope to hoist it up the mast, and ropes through the two bottom loops to anchor it in place and prevent it from swaying. The light could be seen by ships up to 20 miles away due to the magnification of the Fresnel glass lens. This lamp in our collection has a design is similar to the early marine designs but its finish and materials resemble lamps made in the 20th century to represent the older ones. The etched "20" on its cover could represent the 20-mile distance the light could shine, and the "↑" Broad Arrows could represent a maritime navy ship. The lamp is an example of 19th and early 20th-century Anchor Lamps fueled by kerosene and used onboard ships when at anchor or sailing at night.Kerosene lamp; This Anchor Lamp design has a brass frame, a handle with a loop at the top, a rail around the base two opposing loops, and a kerosene burner and tank with ventilation holes around it. A clear glass Fresnel 360-degree lens covers the burner. It is an All Round design. The brand Anchor is inscribed on a plate fixed to its brass cover. An etched inscription on the cover includes the Broad Arrow symbol identifying government property.Engraved plaque: "Anchor" brand. Etched into the metal: "↑20↑"warrnambool, shipwreck coast, flagstaff hill, flagstaff hill maritime museum, flagstaff hill maritime village, kerosene lamp, lighting, ship light, anchor lamp, marine technology, marine lamp, 20 mile light, broad anchor, oil lamp, whale oil lamp, ↑ -
Glenelg Shire Council Cultural Collection
Functional object - Buggy Lamp, n.d
... Buggy or carriage lamp, painted silver, with square lens... or carriage lamp, painted silver, with square lens, (glass cracked ...These sturdy lanterns were originally used on road coaches and carriages of the 18th and 19th centuries to provide safety and illumination. Early carriage lamps were illuminated by lighted candles.Buggy or carriage lamp, painted silver, with square lens, (glass cracked) -
Frankston RSL Sub Branch
Magnifier, Map Reading
... with the glass lens positioned conveniently for map viewing and the base... unfolded this forms a "U" shape with the glass lens positioned ...A small pocket size folding magnifier used for enlarging detail when reading maps or examining aerial photographs complete with a leather storage pouch. Manufactured of brass by Casartelli of Manchester, England. When unfolded this forms a "U" shape with the glass lens positioned conveniently for map viewing and the base can be used to measure scaled distances.This item is stamped "CASARTELLI, MANCHESTER" and has 1/4, 1/2 and 1 inch markings. -
Flagstaff Hill Maritime Museum and Village
Equipment - Kerosene Lamp, Bef. 08-02-1984
... sides, and a curved front. The front has a red ridged glass lens... glass lens insert and the name "port" is inscribed on a fixed ...The kerosene lamp was one of the most common oil lamps used and was manufactured until the 1980s. This lamp appears to be a modern reproduction of an earlier optional wall-mounted kerosene lamp. The lamp has been produced as an example of a 19th and early 20th-century marine kerosene navigation lamp. Marine lamp; portside metal kerosene lamp with two flat sides, and a curved front. The front has a red ridged glass lens insert and the name "port" is inscribed on a fixed brass plaque. A round chimney is on top of the lid and it has a catch. The fuel tank and wick can be removed through the base. The metal appears to be electroplated.Inscribed on the plaque; "PORT"warrnambool, shipwreck coast, flagstaff hill, flagstaff hill maritime museum, flagstaff hill maritime village, lamp, ship lamp, port lamp, marine lamp, navigation lamp, port, lantern, kerosene lamp, marine technology, ship light, portable lamp -
Federation University Historical Collection
Equipment - Polarised Light Apparatus, Microscope, c1870
... brass clips holding a glass lens in position. Parts appear... platform with small brass clips holding a glass lens in position ...Used in physics/optics laboratory at Mt Helen, most probably transferred from SMB to Mt Helen c1870 as SMB start date but could be much earlier A vertical arrangement of lenses, mirrors and polarisers mounted on a brass stand 50cm high with a heavy metal claw foot base. Circular calibrated 360 degrees platform with small brass clips holding a glass lens in position. Parts appear to be original, though the object appears to be missing a eye piece, a mirror to reflect the light, and a viewing platform.CS - 77optics, lenses, mirrors, smb, rocks, microscope, polarisers, scientific instruments -
Flagstaff Hill Maritime Museum and Village
Functional object - Ships Lamp, Telford, Grier and Mackay, 1914-1915
... Ship's port side sidelight lamp with clear glass frenal... on backplate. Ship's port side sidelight lamp with clear glass frenal ...The subject item was produced in 1914/15 by the Telford Grier and Mackay Company in Glasgow, Scotland, this lantern was not used to provide visibility for Sailors on a ship, rather, it is meant to help other vessels identify the ship’s presence and heading in low visibility conditions hence it is marked Port and has a red filter. The lantern would have been placed along the port side of larger vessels to provided an unbroken light and would be visible in an arc from as well as at an angle from the port side of the vessel. The company was established in 1904 at 11 Fairley Street Glasgow and in 1922 moved to 10 Carrick Street. The company manufactured patented lamps for marine use, later moving into the manufacture of electrical and mechanical items. A significant marine kerosene lantern made by a company that patented this type of lantern for use by the British Navy and for merchant ships the world over. This item today is rare and sought by collectors.Ship's port side sidelight lamp with clear glass frenal lens with red filter behind, burner missing, replacement with modern electric fittingTwo makers lozenges one marked PORT the other has the maker Telford, Grier and Mackay, Glasgow, 1915 marked on main body chimney has 1914 marked . Also serial No C976 stamped on backplate.flagstaff hill, warrnambool, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, lamp ship's sidelight, ship's sidelight lamp, port lamp, marine light, navigation light, kerosene ship lamp -
Glenelg Shire Council Cultural Collection
Functional object - Torch, Ever Ready, mid 1900s
... the name. This torch is named a Bullseye because of the glass lens... the name. This torch is named a Bullseye because of the glass lens ...In the 1890s, American Ever-Ready Company founder Conrad Hubert invented the electric flash light which worked with his dry cell batteries . The first Ever Ready flash light was patented in 1898. The first portable flashlights were hand-made from crude paper and fibre tubes, with a bulb and a rough brass reflector. Because batteries were weak and bulbs primitive, flashlights of the era produced only a brief flash of light- thus the name. This torch is named a Bullseye because of the glass lens at the top.This torch helps to interpret the development of lighting. The collection of whale oil lamps as well as gas and electric lighting. Silver coloured metal torch. It has a body and a lid/top. The body is hip flask shaped. On the side of the body is a silver coloured metal button which can be slid up and down. On both the front and back of the body and the top centre are tow small raised circles. The top, which can be removed has a glass dome on it. The inside of the body has a small piece of contact metal where the slide button on the outside turn the torch on and off. In the centre at the top there is the light bulb. The base of the body can also be removed. The base has the makers mark EVER READY stamped on it.Lid light: FY (within a diamond shape) / PATENT 40092 Base: EVER READYlight, torch, lighting, portland, glenelg shire -
Glenelg Shire Council Cultural Collection
Functional object - Navigational Light, n.d
... Circular glass dioptric lens on a cylindrical body, alloy... maritime Front: MEMACK MELB. Circular glass dioptric lens ...PPACircular glass dioptric lens on a cylindrical body, alloy, painted grey, hinged access to the base, fastened with a threaded latch. Battery operated, light missingFront: MEMACK MELB.navigation, light, maritime -
Trafalgar Holden Museum
Functional object - Kerosene Coach Lamp, Circa 1900
... with red glass circular lens. two square glass panels with red... down rear door with red glass circular lens. two square glass ...Manufactured by Holden and Frost for illumination on buggies during ca 1900Manufactured and used by Holden and FrostKerosene coach lamp. Red painted. Drop down rear door with red glass circular lens. two square glass panels with red etched floral pattern in betweenbuggie, lamp, civilian 1900 -
Bendigo Military Museum
Equipment - MAP MEASURER/OPISMETER, DEPOSE
... background. Each face is covered with a convex glass lens... with a convex glass lens. On the opposite end to the handle is a small ...Vintage opisometer used for measuring distances on maps. Part of the Kevin John Herdman, No. 397661, Collection. See Catalogue No. 5942P for details of his service record..1) Circular chromed metal instrument with handle. Calibrated dial with black markings and hand on a white background. Reverse face has unit conversion details in black text on white background. Each face is covered with a convex glass lens. On the opposite end to the handle is a small wheel with milled edge. As it turns, the hand on the front dial turns to measure distance. .2) Rigid plastic rectangular storage case in two parts. Base is yellow, top is clear..1) Printed on front dial: 'INCHES, MADE IN FRANCE'. Printed on back dial: 'Unit conversion details'. Stamped on metal near wheel: 'DEPOSE, H(logo)B'. .2) Stamped on clear cover: 'CURVIMETRE, MAP MEASURER, H(logo)B, MADE IN FRANCE'.map, map measure, equipment, opisometer, kevin john herdman -
Whitehorse Historical Society Inc.
Equipment - Camera (Digital), 2004 ?
... 111mm (equiv) AF 3x optical, all glass lenses. Kodak, Retina..., all glass lenses. Kodak, Retina Aspheric Viewfinder.|Camera ...Purchased by Whitehorse Historical Society to record archival objects. Replaced as the recharger was not operating properly - thus camera unreliable for recording purposes.Camera (Kodak) easy share CX7330, 3.1 mega pixels. 37mm 111mm (equiv) AF 3x optical, all glass lenses. Kodak, Retina Aspheric Viewfinder.|Camera to Battery to Camera Transfer lead|Silver case, silver cord attachment.|4181-1 plastic battery box - grey (empty)|4181-2 Canon compact flash TM card FC 16 M|4181-3 Kodak Camera dock clear plastic. A total of 4 items.Kodak. Easy Share CX 7330photography, cameras -
Vision Australia
Functional object - Object, Magnifying glass
... Glass and silver metallic magnifying glass with a circular... Glass and silver metallic magnifying glass with a circular lens ...Glass and silver metallic magnifying glass with a circular lens and a moulded cylindrical metal handle.Silver coloured metal magnifying glassassistive devices, association for the blind -
Warrnambool and District Historical Society Inc.
Camera, Eastman Kodak Co, Box camers, Early 20th century
... mechanism with a glass lens and a pleated cloth attached...-loaded lens mechanism with a glass lens and a pleated cloth ...This camera is a Premo model made early in the 20th century by the Eastman Kodak company of U.S.A. Premo model cameras were produced in three sizes. Box cameras such as this were produced up to the mid 1920s and were popular with amateur photographers because of the simplicity of the mechanism. This camera has no known local provenance but is retained for display purposes.This is a rectangular-shaped wooden box covered with a black leather trim. On one side is a leather handle attached by two metal buttons. The lid was originally opened by two metal clips at one end and two metal hinges at the other but most of these attachments are now missing. Recessed into the lid are two compartments for storing the film plates. Inside the lid is a glass plate covering the storage area and a spring-loaded lens mechanism with a glass lens and a pleated cloth attached to this lens. The leather on the outside of the box is somewhat scuffed and torn.‘The Premo Camera Made in U.S.A.’ ‘Manufactured by Eastman Kodak Co. Successor to Rochester Optical Co. Rochester N.Y. U.S.A.’ -
The Cyril Kett Optometry Museum
Contact lenses, (estimated); mid 1930's
... Pair of glass scleral contact lenses in D-shaped plastic.... These lenses are rare as few glass contact lenses have survived intact ...These contact lenses represent some of the earliest lenses used in Australia. They were made in Germany and distributed in Australia. Very few optometrists were involved with contact lenses in the 1930's.These lenses are rare as few glass contact lenses have survived intact from the 1930's.Pair of glass scleral contact lenses in D-shaped plastic hinged case. Case for right lens includes rubber suction lens handler.Right case:25/8 R -2, Left case:5/8 L -3. Case cover impressed:Carl Zeiss Jena/ Made in Germanyoptometry, contact lenses, scleral lenses, carl zeiss -
Federation University Historical Collection
Instrument, W. H. Stanley, Surveying level, July 1899
... for object. Features glass lens x 2. Timber carry case features... shield for object. Features glass lens x 2. Timber carry case ...Used by students attending surveying classes at the School of Mines & Industries, Ballarat.Surveyor's level caste in metal with brass trimmings. Features external focus, twin inclined vertical crosshairs with stadia wires. With ray-shade clinomenter. Three levelling screws. Without transverse level (mounting provided). dust shield for object. Features glass lens x 2. Timber carry case features dovetailed joints, separate lid attached to body of case with two brass piano hinges along back side. Case has a metal carry handle screwed to each end. Matches tripod Item 4116 Item's serial number: 99142*The timber lid of the carry case has 'L3' painted on it in white paint. *The paper label glued to reverse side lid of inside carry box reads: STANLEY'S PATENT LEVELS AND THEODOLITES No.99142 July 1899 STADIA POINTS SET=1 : 100. In taking readings of a distant staff by means of the subtense points in the diaphragm, read every 1/100 foot (or metre) on the staff as being equal to one foot (or metre) of distance from the centre of the instrument adding to the reading of plus constant of 18 3/4 inchess from any distance shown. W.F. Stanley, Great Turnstile, Holborn, London. *The paper label glued to lower edge inside lid of carry box reads: N. H. SEWARD, "Optical House" 457 BOURKE STREET (Near Queen Street) MELBOURNE *Engraving on brass plate encompassing the catch on front edge of the timber carry case reads: H&C L (inside an engraved heart on LSH) EUCHRE LEVER (engraved on RHS of brass plate) *Maker's mark is engraved along the length of the telescope barrel: 99142 Stanley. Great Turnstile Holborn, London. level, theodolite, surveying instrument, surveying, scientific instruments -
Blacksmith's Cottage and Forge
Lamp, 1900 (estimated)
... ' in, side door for lighting, fron magnifying glass, metal lens cover... glass, metal lens cover with vertical slit ...This item type was used during the First World War throughout Europe. This item is an artillery siege lamp. It was used by artillery units. The lamps were powered by a single candle, the light being magnified by a lens. A shutter closes over the lens to give an illuminated vertical line. They were used originally in fortified siege artillery posititions as a general purpose lamp. They were also used as aiming lamps when they were placed in front of artillery posititions and used as a guide in aiming at night. Further research has suggested that this item may have been attached to bicycles for illuminating the way in the blackout.This item is considered rare and important. It is historically and technically siginficant at a national level. Painted black metal(tin) candle power, hand held or placed on flat area, open base so candle can be inserted and 'screwed' in, side door for lighting, fron magnifying glass, metal lens cover with vertical slit. There is considerable damage to the black paint in the external regions of the lamp.world war one, military, candle, artillery, europe, lamp, black, artillery siege lamp, artillery units, candle power, aiming lamp, wwi, 1900, australian war memorial, bike light, bike, bicycle, bicycle lamp, blackout -
Flagstaff Hill Maritime Museum and Village
Equipment - Port Navigation Lamp, Genton & Kessler Ltd, 1900 -1920
... locking mechanisms, and hinged lid. Clear glass with red lens... mechanisms, and hinged lid. Clear glass with red lens filter. Fuel ...Alfred Frederick Samuel Genton was born in Switzerland around1869 and arrived in England date unclear. By 1901 the Kelly’s Directory of Birmingham had listed the Genton & Kessler company as manufactures of all kinds of ship & railway lamps, fog horns and general ship fittings with their factory listed as the Bingley Works King Edward Place Birmingham UK that is listed in 1896 as being was owned and run by J E & H Player. Then in February 1905 it appears the partnership of Alfred F S Genton & Julius Rudolf Kessler was dissolved and Alfred F S Genton continued to carry on the business on his own. The company continued on managed by family members until 1961 when it ceased trading.A marine lamp made by a significant maker in Birmingham England in the early part of the 20th century. This item is now regarded as a collectors item. Brass lamp with 'Port' marking with 2 small chain hook locking mechanisms, and hinged lid. Clear glass with red lens filter. Fuel tank and wick burner removed. Stamped Seahorse GB trade mark No 54987flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village -
Flagstaff Hill Maritime Museum and Village
Lamp Lens holder
... Lamp lens holder, glass missing, originally Nickel plated... Peterborough shipwreck SS Queen Lamp lens holder Lamp Lamp lens holder ...When the ship Schomberg was launched in 1855, she was considered the most perfect clipper ship ever to be built. James Blaine’s Black Ball Line had commissioned her to be built for their fleet of passenger liners. At a cost of £43,103, the Aberdeen builders designed her to sail faster than the quick clippers designed by North American Donald McKay. She was a three masted wooden clipper ship, built with diagonal planking of British oak with layers of Scottish larch. This luxury vessel was designed to transport emigrants to Melbourne in superior comfort. She had ventilation ducts to provide air to the lower decks and a dining saloon, smoking room, library and bathrooms for the first class passengers. At the launch of Schomberg’s maiden voyage, her master Captain ‘Bully’ Forbes, drunkenly predicted that he would make the journey between Liverpool and Melbourne in 60 days. Schomberg departed Liverpool on 6 October 1855 with 430 passengers and 3000 tons cargo including iron rails and equipment intended the build the Geelong Railway and a bridge over the Yarra from Melbourne to Hawthorn. The winds were poor as Schomberg sailed across the equator, slowing her journey considerably. She was 78 days out of Liverpool when she ran aground on a sand-spit near Peterborough, Victoria, on 27 December; the sand spit and the currents were not marked on Forbes’s map. Overnight, the crew launched a lifeboat to find a safe place to land the ship’s passengers. The scouting party returned to Schomberg and advised Forbes that it was best to wait until morning because the rough seas could easily overturn the small lifeboats. The ship’s Chief Officer spotted SS Queen at dawn and signalled the steamer. The master of the SS Queen approached the stranded vessel and all of Schomberg’s passengers were able to disembark safely. The Black Ball Line’s Melbourne agent sent a steamer to retrieve the passengers’ baggage from the Schomberg. Other steamers helped unload her cargo until the weather changed and prevented the salvage teams from accessing the ship. Local merchants Manifold & Bostock bought the wreck and cargo, but did not attempt to salvage the cargo still on board the ship. They eventually sold it on to a Melbourne businessman and two seafarers. After two of the men drowned when they tried to reach Schomberg, salvage efforts were abandoned.32 In 1975, divers from Flagstaff Hill, including Peter Ronald, found an ornate communion set at the wreck. The set comprised a jug, two chalices, a plate and a lid. The lid did not fit any of the other objects and in 1978 a piece of the lid broke off, revealing a glint of gold. As museum staff carefully examined the lid and removed marine growth, they found a diamond ring, which is currently on display in the Great Circle Gallery.33 Flagstaff Hill also holds ship fittings and equipment, personal effects, a lithograph, tickets and photograph from the Schomberg. Most of the artefacts were salvaged from the wreck by Peter Ronald, former director of Flagstaff Hill. The Schomberg, which is on the Victorian Heritage Register (VHR S612), has great historical significance as a rare example of a large, fast clipper ship on the England to Australia run, carrying emigrants at the time of the Victorian gold rush. She represents the technical advances made to break sailing records between Europe and Australia. Flagstaff Hill’s collection of artefacts from the Schomberg is significant for its association with the shipwreck, The collection is primarily significant because of the relationship between the objects, as together they have a high potential to interpret the story of the Schomberg. It is archaeologically significant as the remains of an international passenger Ship. It is historically significant for representing aspects of Victoria’s shipping history and for its association with the shipwreck and the ship, which was designed to be fastest and most luxurious of its day Lamp lens holder, glass missing, originally Nickel plated - some remnants remain, encrusted. Recovered from the wreck of the Schomberg.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, shipwrecked-artefact, schomberg, clipper ship, black ball line, 1855 shipwreck, aberdeen clipper ship, captain forbes, peterborough shipwreck, ss queen, lamp lens holder, lamp -
Gippsland Vehicle Collection
driving lights, c 1930's
... 'Road Master' circular lens & blue glass centre insert.Chrome... lens & blue glass centre insert.Chrome plated rim. Stud post ...Optional Automobile accessory lights added to vehicle to improve hight vision.'Notek' Driving Lights (pair), oval shaped, with clear 'Road Master' circular lens & blue glass centre insert.Chrome plated rim. Stud post mount at base.British Madenotek, driving lights -
Flagstaff Hill Maritime Museum and Village
Functional object - Telescope, 1752-1900
... an achromatic lens (two pieces of glass with different indices of light... lens (two pieces of glass with different indices of light ...The discovery of the first telescope in 1608 can be attributed to Hans Lippershey of the Netherlands when he discovers that holding two lenses up some distance apart bring objects closer. He applies for a patent on his invention and this becomes the first documented creation of a telescope. Then in 1668, Newton produces the first successful reflecting telescope using a two-inch diameter concave spherical mirror. This opened the door to magnifying objects millions of times far beyond what could ever be obtained with a lens. It wasn’t until 1729 that Chester Moor Hall develops an achromatic lens (two pieces of glass with different indices of light refraction combined produce a lens that can focus colours to almost an exact point resulting in much sharper images but still with some distortion around the edges of the image. Then in 1729 Scottish instrument maker James Short invents the first parabolic and elliptic, distortion-less mirror ideal for reflecting telescopes. We now come to John Dollond who improves upon the achromatic objective lens by placing a concave flint glass lens between two convex crown glass lenses. This had the effect of improving the image considerably. Makers Information: John Dollond (1707-1761) London England he was a maker of optical and astronomical instruments who developed an achromatic (non-colour distorting) refracting telescope and practical heliometer. A telescope that used a divided lens to measure the Sun’s diameter and the angles between celestial bodies. The son of a Huguenot refugees Dollond learned the family trade of silk weaving. He became proficient in optics and astronomy and in 1752 his eldest son, Peter joined his father in an optical business, in 1753 he introduced the heliometer. In the same year, he also took out a patent on his new lenses. He was elected a fellow of the Royal Society in May 1761 but died suddenly in November and his share in the patent passed to his son Peter. In subsequent squabbles between Peter and the many London opticians who challenged his patent, Peter’s consistent position was that, whatever precedents there may have been to his achromatic lenses, his father had independently reached his practical technique on the basis of his theoretical command of Newtonian optics. As a result of maintaining his fathers patent, Dollond s became the leading manufacturer of optical instruments. For a time in the eighteenth and nineteenth century the word 'Dollond' was almost a generic term for telescope rather like 'Hoover; is to vacuum cleaner. Genuine Dollond telescopes were considered to be amongst the best. Peter Dollond (1731-1820) was the business brain behind the company which he founded in Vine Street, Spitalfields in 1750 and in 1752 moved the business to the Strand London. The Dollonds seem to have made both types of telescopes (reflecting and refracting), possessing the technology to produce significant numbers of lenses free of chromatic aberration for refracting telescopes. A Dollond telescope sailed with Captain Cook in 1769 on his voyage to observe the Transit of Venus. Thomas Jefferson and Admiral Lord Nelson were also customers of the Dollonds. Dollond & Co merged with Aitchison & Co in 1927 to form Dollond & Aitchison, the well-known high street chain of opticians, now fully part of Boots Opticians. They no longer manufacture but are exclusively a retail operation. John Dollond's experiments in optics and how different combinations of lenses refract light and colour gave a better understanding of the divergent properties of lenses. That went on to inform and pave the way for the improvement of our understanding of optics that are represented today. Dollond was referred to in his time as the "Father of practical optics" as a leader in his field he received many prestigious awards. The telescope in the collection is a good example of one of Dollonds early library telescopes and its connection with one of England's 18th-century pioneers in optical development is in itself a significant and an important item to have within the collection. One tube ships day & Night Telescope brass inner tube with timber main tube covered in leather. Unavailable to inspect Inscriptions to determine authenticity.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, telescope, dolland, shipwreck-coast, flagstaff-hill-maritime-village, royal national life boat institution -
Flagstaff Hill Maritime Museum and Village
Instrument - Telescope, Early 18th Century
... an achromatic lens (two pieces of glass with different indices of light... that Chester Moor Hall develops an achromatic lens (two pieces of glass ...This Dollond Day or Nigh telescope was designed to be used in any light conditions, as its name implies. Telescopes are optical instruments designed to make objects appear to be larger or closer. The discovery of the first telescope in 1608 can be attributed to Hans Lippershey of the Netherlands when he discovers that holding two lenses up some distance apart bring objects closer. He applies for a patent on his invention and this becomes the first documented creation of a telescope. Then in 1668, Newton produces the first successful reflecting telescope using a two-inch diameter concave spherical mirror. This opened the door to magnifying objects millions of times far beyond what could ever be obtained with a lens. It wasn’t until 1729 that Chester Moor Hall develops an achromatic lens (two pieces of glass with different indices of light refraction combined produce a lens that can focus colours to almost an exact point resulting in much sharper images but still with some distortion around the edges of the image. Then in 1729 Scottish instrument maker James Short invents the first parabolic and elliptic, distortion-less mirror ideal for reflecting telescopes. We now come to John Dollond who improves upon the achromatic objective lens by placing a concave flint glass lens between two convex crown glass lenses. This had the effect of improving the image considerably. Makers Information: John Dollond (1707-1761) London England he was a maker of optical and astronomical instruments who developed an achromatic (non-colour distorting) refracting telescope and practical heliometer. A telescope that used a divided lens to measure the Sun’s diameter and the angles between celestial bodies. The son of a Huguenot refugees Dollond learned the family trade of silk weaving. He became proficient in optics and astronomy and in 1752 his eldest son, Peter joined his father in an optical business, in 1753 he introduced the heliometer. In the same year, he also took out a patent on his new lenses. He was elected a fellow of the Royal Society in May 1761 but died suddenly in November and his share in the patent passed to his son Peter. In subsequent squabbles between Peter and the many London opticians who challenged his patent, Peter’s consistent position was that, whatever precedents there may have been to his achromatic lenses, his father had independently reached his practical technique on the basis of his theoretical command of Newtonian optics. As a result of maintaining his fathers patent, Dollond s became the leading manufacturer of optical instruments. For a time in the eighteenth and nineteenth century the word 'Dollond' was almost a generic term for telescope rather like 'Hoover; is to vacuum cleaner. Genuine Dollond telescopes were considered to be amongst the best. Peter Dollond (1731-1820) was the business brain behind the company which he founded in Vine Street, Spitalfields in 1750 and in 1752 moved the business to the Strand London. The Dollonds seem to have made both types of telescopes (reflecting and refracting), possessing the technology to produce significant numbers of lenses free of chromatic aberration for refracting telescopes. A Dollond telescope sailed with Captain Cook in 1769 on his voyage to observe the Transit of Venus. Thomas Jefferson and Admiral Lord Nelson were also customers of the Dollonds. Dollond & Co merged with Aitchison & Co in 1927 to form Dollond & Aitchison, the well-known high street chain of opticians, now fully part of Boots Opticians. They no longer manufacture but are exclusively a retail operation. John Dollond's experiments in optics and how different combinations of lenses refract light and colour gave a better understanding of the divergent properties of lenses. That went on to inform and pave the way for the improvement of our understanding of optics that is represented today. Dollond was referred to in his time as the "Father of practical optics" as a leader in his field he received many prestigious awards. The telescope in the collection is a good example of one of Dollond's early library telescopes. Its connection with one of England's 18th century pioneers in optical development makes it a significant and an important item to have within the collection.Telescope: Dollond's Telescope, Day or Night model navigational instrument. Telescope is mounted on wooden tripod stand that has folding legs. Brass telescope with leather sheath over barrel, adjustable angle fitting with brass wing nuts that join the legs to the top frame, which is then joined to the telescope pole by an adjustable screw fitting. Manufactured by Dollond, London. Inscription reads "Dollond London, Day or Night" and "DOLLOND LONDON"flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, telescope, dollond, dollond london, day & night telescope, floor-standing telescope, optical instrument, john dollond, peter dollond, achromatic telescope, heliometer, light refraction, instrument maker, lens, transit of venus, astronomical telescope, concave lens, library telescope, dollond telescope, day or night, day or night telexcope, scientific instrument, navigation, navigational instrument, astronomy -
The Cyril Kett Optometry Museum
Round gold rimmed quizzer, 19th Century
... at its end for a cord or ribbon. The lens is glass of power... for a cord or ribbon. The lens is glass of power of +7.50 DS. Round ...The power of the lens, +7.50 DS, suggests this might be a magnifying lens for near work rather than a quizzer for distance vision.Round gold rimmed quizzer with machine engraved lens rim. Turned ornamental stem with a small engraved swivelling ring at its end for a cord or ribbon. The lens is glass of power of +7.50 DS. -
Numurkah & District Historical Society
Railways Platform Lamp
... at stoppings, Cubed in shape with angled sides. Plain glass front, Red... at stoppings, Cubed in shape with angled sides. Plain glass front, Red ...Large Platform Lamp used by Railways to signal train at stoppings, Cubed in shape with angled sides. Plain glass front, Red-coloured lens on both sides, which can be opened to reveal plain glass.. Covered chimney on top . Bracket on the back to hang the lamp up. railway, platform lamp, lantern, signal, kerosene -
Federation University Historical Collection
Equipment - Scientific Equipment, Optical Instruments
... pieces of glass (one missing) - Lens set. .3) Hinged black box... box with six circular pieces of glass (one missing) - Lens set ...5 Optical instruments. .1) An Octagon of mirrors with a timber base and top. .2) Black hinged box with six circular pieces of glass (one missing) - Lens set. .3) Hinged black box with a number of 5 .4) Box with handle with a number of boxes and five pieces of glass (one missing) .5) Black hinged casewith 5 pieces of shaped glass and a mirror attached to wood, and a metal item (one piece is missing) - lens set.scientific instruments, scientific objects -
Kiewa Valley Historical Society
Stereoscope
... . The instrument has 2 round glass ('mirrored viewing lens') cylinders eye.... The instrument has 2 round glass ('mirrored viewing lens') cylinders eye ...The stereoscope was an interpretation device used to interpret aerial photography and the landscape. It was used by National Parks Victoria located at Mt Beauty to look at aerial photos so that they showed up the relief of the topography and therefore looked 3D.Used by National Parks Victoria staff located at the Mt Beauty office during the 1970's and early 1980's.Dark green wooden box with padded protection around the perimeter and on lid where 2 rectangular pieces of wood touch the stereoscope. The box is fitted with wooden dividers that fit around the stereoscope. The stereoscope is green metal with folding legs and sides attached to allow the stereoscope to sit on a surface. The instrument has 2 round glass ('mirrored viewing lens') cylinders eye distance apart, that allow light in from the side swinging doors. The amount of light is constricted by a rectangular piece of metal at the top of each leg. The box has swing clips used to close it and a metal swing handle all on the front side.The hinges are reinforced (and offer protection) by additional rubber pieces at each end. Inside the box is a brush made of bristle with a wooden handle - used for cleaning.Outside and top of box: written in black: No. 1026. On blue tape beneath: Mirror stereoscope 1026. written in black centre top of box: W10/WKA.0233. On front edge of box written in black: W10/WKA 0233. Inside box lid on silver plaque: Stereoscope Universal/ Made in / Australia / Die Casters Ltd. Victorianational parks victoria. stereoscope. aerial photographs. scientific instrument. mt beauty. 3d -
National Wool Museum
Functional object - Yarn Spinner and Accessories, John Nesbitt, 19th Century
... magnifying glass on long thin handle. Glass has two concave lenses... tweezers. Circular magnifying glass on long thin handle. Glass has ...Nino Corda was a Geelong based textile designer who worked at various textile mills between 1957 & 2003. He travelled the world in search of the latest fashions and techniques and developed timeless designs that were much loved by Australians. These items are on rotational display at the National Wool Museum’s ‘In the Factory’ exhibition. For many years, Nino also worked as part of the Honorary Staff of the National Wool Museum. His passion for the world of textiles provided energy and knowledge to the visitors and staff of the museum. Although Nino has now retired from his honorary position and has hung up his Australian Tartan vest, these items will continue to serve the community in sharing the stories of Australian Textile design.Custom made wooden hinged box with a hook latch. Brass yarn spinner, attached to a mahogany wood plinth base, which spins fibre into cord/yarn/thread. It has dials to set the rate that it spins. Metal plaque with black inlaid enamel lettering. Small cork inlay. Brass rod with hinge and wingnut, and ball at end. Ball at end has an adjustment mechanism. Rod also has an adjustable circular collar. Pair of curved tweezers. Circular magnifying glass on long thin handle. Glass has two concave lenses. Weaving sample in shades of blue, green and brown. Twill weave. Alternate pattern samples separated by red thread.Brass plaque on base of spinner: 42 MARKET St / John Nesbitt / REGd TRADE MARK / LIMd / MANCHESTER Underside of wooden plinth: 4976apparatus, textile, testing, spinning, nino corda, magnifyer, tools, brass, mahogany, tweezers, yarn, spinner, design, john nesbitt, manchester, england, 19th century, engineering, manufacturing -
Orbost & District Historical Society
spectacles and spectacle cases, late 19th early 20th century
This collection of glasses and cases was donated by Miss Connie Cruickshank. She was part of the family of Orbost's first doctor, Dr James Kerr. As the 19th Century came to a close, more and more people wore their eyeglasses everyday. A popular style of inexpensive, everyday spectacles was the pince-nez. French for "pinch nose," the pince-nez was first developed in France circa 1840 and began to be imported after the 1850s. Pince-nez have no temples, but are fit snugly on the bridge of the nose. Pince- nez could be uncomfortable to wear and broke often from falling off the nose. These items demonstrate how glasses' styles have changed over time. One pair of pince-nez glasses and its brown leather case shaped to fit. One solid black wooden case with a small hinged door at one end. One blue/black case with the words A A Abotomey 14 Carpenter Street Middle Brighton in gold lettering. Five pairs of spectacles, one with blue coloured glass with crack in one lens.A A Abotomey 14 Carpenter Street, Middle Brightonspectacles spectacles-cases pinz-nez