A glass prism of equilateral triangular shape mounted by a ball-joint to a vertical brass stand and brass base. scientific instrument, prism, optics

Prism - for equipment not identified in wooden box

Ill, p.48.non-fictionA series of essays by schoolchildren on the subject of the spirit of ANZACanzac - childrens perspectives, cairns rsl sub-branch

Boyd designed the exhibition for the opening of the Australian Chancery in Washington DC held in June 1969. He designed six cylindrical clear acrylic display cases. One of these exhibits used an anamorphic optical illusion, using compressed images which had normal proportions when viewed through a lens of the half-cylindrical display cases. These bookends were designed as a small scale model for the Chancery exhibition. Placing the disc (item F158) underneath the adjacent two half-cylindrical bookends demonstrates how the bookends behave as a lens.Two half cylindrical acrylic prismsaustralian chancery, walsh st furnishings, robin boyd, ohm2022, ohm2022_3

PRISM MINING WHIP NEGATIVE FOR A. RICHARDSON.bendigo, mining, negative prism mining whip

After years of precursory surveying, debate and proposals the most ambitious civil engineering project of the day, the Overland Telegraph Line, began construction in September 1870. Superintendent of Telegraphs, Sir Charles Todd led the construction through “terra incognita,” guided by the precursory surveys of John McDowall Stuart and technologies such as his prismatic surveying compass. The unknown and hostile landscape claimed the lives of several men and scores of transport animals in the dogged pursuit of telegraphic connection to the rest of the world. Completed in August 1872, the Line connected Australia to the world via telegraph wires running 3,200 kilometres from Port Augusta in South Australia, to Darwin, then connecting via submarine cable to Java and beyond. The “earth [had been] girdled with a magic chain” according to the then Governor of New South Wales, Sir Hercules Robinson. How does it work? For use in surveying, the sight vane and prism are turned up on their hinge and the instrument is held horizontally either in the palm of one's hand or on a tripod. Two small discs of red and green glass attached to the prism can be flipped down over the sight line to reduce glare. The objective is to bring the subject into the sightline created by the prism, aligning with the thread of the sight-vane until the subject is bisected evenly. Once aligned, the division on the card may be read through the prism. This reading provides the magnetic azimuth, used for calculating the bearings of distant landmarks. Circular instrument mounted in a brass case with glass window and brass lid. The compass card face four black compass points printed on mint green paper; on the underside the magnetic needle would be affixed, all held in place by a brass knob at the centre. The arched labels of "Sawtell" and "Adelaide" and the Prince of Wales feathers appear to have been affixed with adhesive which has since yellowed in the areas of application on the compass card. The compass face is printed with numbers, every 10 degrees from 10 - 360, printed in reverse indicating this compass would have once held a mirror at the sighting bracket. On one side of the brass case is a brass hinged sighting-prism, possibly of ebonite. The sighting-prism is mounted in a hinged brass bracket on one edge of the brass case. It has two flip-type filter glasses (red and green) and folds down into a retracted travelling position. A hinged brass bracket on the opposite edge would have held the sighting bracket - carrying the sighting vane and mirror - which is now missing or removed. Under the hinge is a lever, possibly related to the movement of the bracket. Underneath the brass case is an indented circle with screw threads, possibly for attachment to a tripod, and indistinguishable marks scratched into the surface.Etched on to the centre of the lid, "Sawtell ADELAIDE / No 792." Affixed to the paper compass face, possibly from separate pieces of paper, "SAWTELL / ADELAIDE" with the Prince of Wales Feathers above "SAWTELL". Underneath on remains of white tape in red: "159."surveying, compass, charles todd, overland telegraph line, telegraph

The Universal Stereoscope was used to view overlapping stereo aerial photography in three dimensions (3D). It consists of magnifying lenses, an optical train including glass prisms and mirrors that are protected by sliding metal covers all suspended on a pair of fold out adjustable legs. The stereoscope is coloured military olive drab green. This Universal Stereoscope was produced in Australia in 1940 for Military use. It was originally produced with a timber protecting carry box that is missing. It was used extensively by members of the Australian Survey Corps during WWII in many theatres of War for viewing and annotating aerial photography. Item 6205.6P, photograph 6205.1P shows the Universal Stereoscope in use by the Australian Survey Corps annotating aerial photography.The Universal Stereoscope was used to view overlapping stereo aerial photography in three dimensions (3D). It consists of magnifying lenses, an optical train including glass prisms and mirrors that are protected by sliding metal covers all suspended on a pair of fold out adjustable legs. The stereoscope is coloured military olive drab green."DC-1940 Serial No 550", "D V D", "Made in Australia" Plate on the underside reads " This stereoscope was donated to the Ex Fortuna Survey Association by the Eaglehawk Recycle Shop February 2015"royal australian survey corps, rasvy, fortuna, army survey regiment, army svy regt, asr

This item has applications in teaching Physics and Chemistry - obtaining information about the atomic structure of the light-emitting substance. An optical instrument that employed a monochromatic light source, a prism (missing), and viewing lenses mounted in a tube that can be in any radial position with respect to the vertical axis of the prism. House in a polished timber carry box.Manufacturers' and suppliers names stamped on the vernier disc: "Made by W. & J. George Ltd, Birmingham, England" and "For H.B. SELBY & Co, SYDNEY & MELBOURNE. No 266"scientific instruments, surveying, microscope, physics, chemistry, atomic structure, spectroscope

8361.1 - High-grade black coal, shaped overall like a triangular prism.

8492.1 - Oval sided prism in shape, has latches, hinged door and carry handle.

Bendigo Performance of the Prism Wind Quintet Program for concert at BRAC (no year date) with CVs of Players.

This item was used at the Ballarat School of Mines.It had applications in teaching physics and chemistry - obtaining information about the atomic structure of the light-emitting substance.Spectrometer in wooden case. An optical instrument that employs a monochromatic light source, a prism (missing) and viewing lenses.Serial number: 1667 Manufacturer's and Supplier's namesscientific instrument, ballarat school of mines, labororatory, physics, optical measurement, chemistry, structure of substance

Ornamental ruby glass lustre with ten faceted prism teardrop vase. Some sections of top are enamelled.domestic items, ornaments / decorative

How widely the prisoptometer was used is unclear but the Standard Optical Company later patented a new model, The Standard Prisoptometer, on June 21, 1904. Edward Jackson's crossed cylinder technique of determining astigmatism was first detailed in the Transactions of the American Ophthalmological Society (1887)4:595-598. The convenience of Jackson's crossed cylinder lenses over the prisoptometer in weight, cost, portability and reliability meant that they were soon almost universally adopted.This is a rare item as few are known world wide.This instrument is an optometer, that is, a device to measure the refractive error of an eye. It is made of cast iron, steel, brass and glass. It contains a prism which could be rotated, and was used to view a disc or an object circle. The prism caused monocular doubling of the object circle and the separation of the two images varied as the prism rotated, depending on the astigmatism present. The axis of the astigmatism was indicated by the prisoptometer and trial lenses were used to determine the the magnitude of the spherical and cylindrical refractive errorImprinted:"DR CULBERTSON'S PRISOPTOMETER/ GENEVA OPTICAL COMPANY MAKERS, GENEVA, N.Y./ PATENTED SEPT, 21, 1886". Stamped "853" on eyepiece and lens mounting.optometry, prisoptometer, optometer, astigmatism, refractive error, refraction, culbertson

8348.1 - Roughly triangle-sided prism in shape; pieces of fossil wood; one face seems to have slip-surfaces.

Binoculars used in the fieldKhaki coloured canvass case with carry strap containing metal Binoculars Serial number 150918 Binoculars prism No 2 Mk 2, magnification x6. O.S, 108 M.A. world war two, second world war, binoculars, binoculars prism no 2 mk 2, wwii, ww2

Spectrograph with wooden stand, glass prism, small metal panel & small wooden panel. Very early, first in Department.

The Clinical Use of Prisms; and the Decentring of Lenses, Author: Ernest E. Maddox. Publisher: John Wright & Co Fifth edition. Published 1907flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, the clinical use of prisms, book, ernest f. maddox

This is a set of five photographs of CAPT James ‘Jim’ Leslie Stedman in the field demonstrating the setup of prisms used as electric distance measurement (EDM) receiver reflectors for tellurometer equipment and the sighting of a large surveyor’s light. This equipment was deployed in establishing mapping and geodetic control operations. The photos were most likely taken in the late 1950s or early 1960s. The tellurometers of this era were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. Jim Stedman later reached the rank of Colonel, was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment. See item 6180.16P, photos .14) to .16) for more information and photos of Jim Stedman’s EDM demonstration. This is a set of five photographs of a surveyor in the field demonstrating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) to .2) - Photo, black & white, c1960s, CAPT Jim Stedman demonstrating the sighting of a large surveyor’s light. .3) to .5) – Photo, black & white, c1960s, CAPT Jim Stedman demonstrating EDM prism equipment. .1P to .5P on back – CAPT Stedman EDM Eqpt.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

Further information on the unidentified object has not been available during preparation of this report, but it may be a buoy light, or perhaps even a solar powered rotating light made by Pharos Marine, New Zealand. Portable beacon lights were made with a plastic lens and an aluminium base and it is known that one of these was installed in the Gabo Island Lighthouse in February 1992. It was replaced in May 2006 and the lights are now no longer used within the AMSA network. The unidentified item, which can be described as a white painted conical object, appears to be associated with signalling, but more information is needed to confirm this. These items of equipment are presumed to relate to core lightstation functions and look to be in good condition. They have at least second level significance for their probable provenance and association with the theme of visual signalling and the use of navigation equipment for maintaining safe routes for shipping.Beacon and unidentified object (GILS 0095) The portable beacon is a small rotating light containing a lens and prism. The other item can be described as a white painted conical object.

unknown8436.1 - Coal boring auger bit, handle missing. Tip is single-pointed; point of attachment for handle is rectangular-prism-shaped and the bit appears to be secured by means of welding together interlayered tonques of metal.

Orange foreground, grey/blue background with ink prisms. Mounted in an aluminium frame behind glass. If you can assist with information on this artist or artwork, please leave information via the email link below. Signed lower right side. A.R. Hall?], 1983. artwork, artist, drawing, churchill, gippsland campus

8345.1 - Large, roughly trapezoidal prism of mudstone, one large face showing several leaves (phyllopteroides?), opposite face showing one partial; leaf and what appears to be a piece of confer foliage- stem and leaves.

A fluorescent screen seen with an illuminated scale shows the wavelength(s) of entering light. A Cylindrical Quartz Lens is provided to concentrate on the slit light from weak sources. The scale is illuminated by regular white light through a window. Ultra Violet Spectroscope. A black finished device with adjustable aperture in a storage box with eyepiece shield and clamping screw. scientific instrument, balance, spectoscope, ultra violet spectroscope, prism