Part of collection of various maritime artefacts donated by Bill LibbyAn extendable telescope with its own leather case and strap.International code flags label on body of telescopetelescope, optical instrument, leather case

Opera glasses from the family collection of the McIntyre familyPair of brass and ivory opera glasses with a fitted brown suede carrying case, lined with blue silk. Donated by Dione McIntyre in 1995optical instruments, dione mcintyre, opera glasses

This hand painted prosthetic eye would have been used for people who have had to have an eye removed due to damage or disease. The prosthesis fits over an orbital implant and under the eyelids. Often referred to as a glass eye, the ocular prosthesis roughly takes the shape of a convex shell. 1 prosthetic white glass eye with blue iriskerri wilson optical prosthetics, prosthetic eye

The seven weights (0008.4 and 0136.3) are circular in shape with a hole in the centre and a groove cut across the radius. They were specifically designed to fit into a weight tube, which allowed movement of the weights that were used for driving the clockwork mechanism for turning the lighthouse lens. They are most likely original to the Chance Brothers system installed in 1913, which was originally equipped with a set of ten, each weighing around thirty kilograms.The weights were moved vertically in similar fashion to the way weights move on a grandfather clock. As the weight fell, the optic clock was driven and the lens was turned. To keep the clock turning, the weight needed to be wound back up to the top of its travel. Lighthouse keepers had to constantly wind the clock to keep the light active, and at least two keepers needed to observe a strict roster of hours. When electric motors were invented, weights became obsolete and the motors were able to turn the optic for as long as there was power to drive them. Wilsons Promontory’s Chance Bros. kerosene operated light, which was turned by a clockwork mechanism, was replaced by small electric motor in 1975, reducing the number of keepers and eliminating the need for weights. Cape Schanck has a set of fourteen weights remaining in situ in the lighthouse weight tube as well as another four detached weights, two of which may be associated with the 1859 mechanism. A small number of detached cast iron weights and two associated rods remain at the Point Hicks Lightstation and one weight is displayed in the lantern room at Cape Otway.The Wilson Promontory weights have first level contributory significance for the insights they provide into the technology and operations of a late nineteenth/early twentieth century lighthouse which has since been superseded. They are well provenanced and are significant for their historical value as part of the lightstation’s Chance Brothers optical system installed in 1913.Four circular disc shaped lead weights, all with a narrow section cut out to the middle of shape. (as in slice of cake)

Margaret MitchellA rare and vintage gold painted metal Designoscope or Kaleidoscope with a prism and turntable for creating a kaleidoscopic effect. It is very rusted and worn. It has a triangular metal tube and a heavy base. It was designed for artists and illustrators rather than children. It has a coloured separate label."Designoscope British Made"kaleidoscopes, leisure object, optical toys

A small number of heavy cast iron weights and two rods remain at the Point Hicks Lightstation. These weights comprise one rod with a forked top and four circular weights attached to the bottom of the shaft. The weights and rods were part of the original clockwork mechanism that was fitted beneath the lens to keep the kerosene‐fuelled light turning. They were attached to a cable or chains and moved vertically in similar fashion to the way weights move on grandfather clocks. As the weight fell, the optic clock was driven and the lens was turned. To keep the clock turning, the weight needed to be wound back up to the top of its travel. The cables and weights in this lighthouse were visible as they moved through the length of the tower up to the lantern room. It was usual for systems to move inside a tube extending up to the top, but in this case the tower’s cast iron spiral staircase, which is supported on cantilever cast iron brackets set into the concrete wall, spiralled around the space in which they moved. Lighthouse keepers had the arduous job of having to constantly wind the clock to keep the light active, and at least two keepers needed to observe a strict roster of hours. When electric motors were invented, all of this became redundant and the motors were able to turn the optic for as long as there was power to drive them. In December 1964, the original 1890 Chance Bros kerosene‐fuelled light and clockwork mechanism were replaced by small electric motor, and the number of keepers reduced to two. The six circular weights and rods originate from the obsolete system and may have been part of a larger set. Wilsons Promontory retains seven of its original set of ten weights, all of which are detached from the tower’s weight tube. Cape Schanck has a set of fourteen weights remaining in situ as well as another four detached weights, which have inscriptions. One weight is displayed in the lantern room at Cape Otway. The image shows four of the clockwork weights attached to a rod with a forked top. They were part of the original clockwork mechanism that was fitted beneath the lens to keep the kerosene‐fuelled light turning. The Aldis lamp in its case sits on the floor next to the weights. Source: Parks Victoria.The Point Hicks weights have first level contributory significance for the insights they provide into the superseded technology and operations of a late nineteenth century lighthouse. They are well provenanced and are significant for their historic value as part of the lightstation’s Chance Brothers optical system installed in 1890. Four circular metal weights are stored on a metal rod with a forked section at the top. The weights have a cut out section which allows the weights to be removed easily.

A small number of heavy cast iron weights and two rods remain at the Point Hicks. The weights and rods were part of the original clockwork mechanism that was fitted beneath the lens to keep the kerosene-fuelled light turning. They were attached to a cable or chains and moved vertically in similar fashion to the way weights move on grandfather clocks. As the weight fell, the optic clock was driven and the lens was turned. To keep the clock turning, the weight needed to be wound back up to the top of its travel. The cables and weights in this lighthouse were visible as they moved through the length of the tower up to the lantern room. It was usual for systems to move inside a tube extending up to the top, but in this case the tower’s cast iron spiral staircase, which is supported on cantilever cast iron brackets set into the concrete wall, spiralled around the space in which they moved. Lighthouse keepers had the arduous job of having to constantly wind the clock to keep the light active, and at least two keepers needed to observe a strict roster of hours. When electric motors were invented, all of this became redundant and the motors were able to turn the optic for as long as there was power to drive them. In December 1964, the original 1890 Chance Bros kerosene-fuelled light and clockwork mechanism were replaced by small electric motor, and the number of keepers reduced to two. The six circular weights and rods originate from the obsolete system and may have been part of a larger set. Wilsons Promontory retains seven of its original set of ten weights, all of which are detached from the tower’s weight tube. Cape Schanck has a set of fourteen weights remaining in situ as well as another four detached weights, which have inscriptions . One weight is displayed in the lantern room at Cape Otway. The Point Hicks weights have first level contributory significance for the insights they provide into the superseded technology and operations of a late nineteenth century lighthouse. They are well provenanced and are significant for their historic value as part of the lightstation’s Chance Brothers optical system installed in 1890.PHLS0005.1 Round cast iron weight with flat base used for lens clock-work mechanism attached to a bent metal rod. PHLS0005.2 Removable round cast iron weight with flat base used for lens clock-work mechanism stored above the other weight.

Belonged to Mrs. Ellen & Mr. Charles CornellSmall brass pocket magnifying glass - brass surround. Round with round finger hold.magnifying glasses, optical instruments

Small brass pocket magnifying glass with glass viewer.magnifying glasses, optical instruments

Associated sheet of paper inside box lists each of the test plates as having been tested and found defective.Cardboard box containing cotton wadding and straw padding layered above glass plates individually wrapped in tissue paper. Five plates in the top layer, followed by more padding, 2 more plates, padding, 8 glass plates, padding and straw. Plates are variously sized and circular in shape.Handwritten on box lid: 'REJECT TEST PLATES / MK1 DIAL SIGHT' unreadable handwritten inscription '18' '[E. E. N Wa...worth] / [...] / [Kob...]' '23/11/45' Munitions labelled with technical specifications of each lens. dial sight, optical munitions, glass, mk 1

The phosphoroscope was invented by Alexander Edmund Becquerel and used to measure the amount of time that a phosphorescent substance will glow after being irradiated by a brilliant source of light.The phosphoroscope consists of a round metal chamber with a pair of rotating discs inside, arranged so that no light can pass directly through the chamber. The discs have cut-out windows spaced equally at regular angular distances and are turned by the hand crank linked to a gear mechanism. The sample is placed in a specially designed holder into the small opening near the gearing, and it is exposed to the light source through the large rear condensing lens.Engraved on chamber: 'Phosphoroscope de E. Becquerel / J. Duboscq a Parisbecquerel phosphoroscope, phosphoroscope, optical instruments, phosphorescent, alexander edmund becquerel, jules duboscq, france

Testing of eye conditions requires the services of eye specialists, who often had to travel around a wide area. This kit is incomplete, but demonstrates how optometrists needed a wide variety of instruments to diagnose sight conditions. Although incomplete, it also contains a booklet for the Standard Testing Set 1H-1 produced by the same company (Keeler) and briefly describes some of the instruments in the case.1 maroon case with two blue velour inserts'Note this side up' in Dymo tape on outside.assessments, keeler optical products

The Mark II Pilot Balloon Slide Rule was made of wood laminated with heavy white plastic with a length of 24.5-in. and width of 2.5 inches. Mark II rules were manufactured in Australia by W & G (Melbourne). The W & G rule differs only slightly from the English A. G. Thornton LTD rule. The W & G rule uses serif fonts and has some fiducial marks that the English rule lacks. Exact dates of production are not known but the MK II is known to have started production by 1927. The printed scales are engraved in the plastic faces. The slide rule has 4 captive cursors (glass windows and brass guides) that ride in slots on the top and bottom edges. Each can be moved independently of one another. The cursors are missing from this item. Brass knobs at both ends of the slide facilitate its movement. The case is fabric covered wood with felt lining. No known history for this item as located in a property after purchase. The Pilot Balloon slide rule is used to convert the observed azimuth and elevation readings into wind velocity and direction records. The use of slide rules was abandoned with the wide spread adoption of computers and programs to do the calculations, as well as the decline in the use of optical pilot balloon theodolites.Made in Australia by White & Gillespie (Melb) Pty Ltd. Established in 1910, the firm was involved mainly in printing plate manufacture, but during the Second World War it manufactured a variety of navigational aids and range finding devices for the military. About 250,000 instruments were made during that period. After the war the company produced, among other items, drawing instruments and slide rules. The long narrow case is fabric covered wood with felt fabric lining containing a long black laminate ruler with numerous white markings and numbers. Top of the ruler is in three sections with the centre section movable by small gold metal knobs at either end. This slide rule contains a engraved notation on the rear face "IMPORTANT. NORMALLY NUMBER OF GRATICULE SCALE DIVISIONS PER RADIAN (K) X LENGTH OF TAIL IN FEET (I) = 12X 105. IN OTHER CASES MULTIPLY GRATICULE READINGS BY 1.2/KI BEFORE CALCULATION ON RULE" Top of Slide Rule - RAAF Ident No G268/480 Serial WG/22pilot balloon slide rule, raaf