Olive green enamelled stereoscope enclosed in olive green wooden hinged box. Two test stereoscopic pictures of a rhino also kept in box. A wooden oddment (10 cm) is also enclosed.Engraved in white on stereoscope: “DC-1940 Serial No. 32” Label on front of box: “stereoscope”

Used as a periscope instrument. Twin pair of periscope components made of iron and covered in olive green enamel.

Round glass lens stored in rectangular cardboard box with lid and supported by cotton wool.On inside of box in pencil: “20/1/40 (?dictatomigialls of l/4). On top of box: “wray flat”.

Test plate rectangular glass slide with rulings under circular cover glass within yellow circle and brown border enclosed in red hinged box with blue lining. Described as “A sample Microscope slide - Test plate with rulings from 30,000 to 120,000 per inch”. This is the only surviving ruling reaching up to 120,000; hence is both unique and valuable.Labels on slide: “Test plate 10,000 to 120,000. Ruled by H.J. Grayson, Melbourne”. No of lines per inch Band 1-10,000 2-20,000”. On label on side: “No of lines per inch Band 3 -30,000 4 - 40,000 5-50,000 6-60,000 7-70,000 8-80,000 9-90,000 10-100,000 11-110,000 12-120,000”

Black and white photograph entitled “E.J. Harrung and an experimental pot of optical glass” Duplicate of no 157 On back of image in ink: “36 Prof. Hartung” On front of image in ink: “36”

Black and white photograph entitled “G.A. Ampt and E.J. Hartung and experimental pots of opitcal glass” Duplicate of no. 158On back of image in ink: “37 L to R: G.A. Ampt and Prof. Hartung”, “1886-1953 see ADB Vol 7” On front of image in ink: “37”

Black and white photograph of young male examining optical glassOn back of image in pencil“29” On front and back of image in ink: “29”

“Optical microscope made in Australia after 1939-45 war. Made in Australian Optical Company, Melbourne heade by Lawrence Dickens Collection Design probably by Maximilian Hertzberger; Messrs Curtis and W. Gallaghar, both ex MSL, were responsible for production. Full discussion given in Bolton, H.C. J.J. McNeill and the Development of Optical Research in Australia. Historical Records of Australian Science 5 (1983) pp 55-70”Black and white photograph of optical microscope. See History of Object for transcript of writing on back of image.

Black and white photograph portrait of G.F. DaintyOn front of image in ink: “4” On back of image: “5”, “No. 5 G.F. Dainty”. See History of Object for transcript.

Black and white photograph of Henri Rathgeber looking through equipment. On front of image in ink: “6” On back of image in pencil: “No. 6 Henri Rathgeber” On back of image in ink: “6”

Black and white photograph of two scientists at work (A.C. Goodwin and Peter Law).On front of image in ink: “8” On back of image in pencil: “No. 8 A.C. Goodwin Peter Law” (L to R) On back of image in ink: “8”

Black and white photograph of two scientists at work (A.C. Goodwin and Peter Law). On front of image in ink: “9” On back of image in pencil: “No. 9 A.C. Goodwin Peter Law” (L to R) On back of image in ink: “9”

Black and white photograph of two scientists (J.B. Willis and P.G. Law) at work on microscope On front of image in ink: “31A” On back of image in pencil: “31A J.B. Willis, P.G. Law ” (L to R) On back of image in ink: “31A”

Black and white photograph of male scientist (Kahanine) working on graphic design. On front of image in ink: “31” On back of image in pencil: “No. 31 Kahanine’ On back of image in ink: “31”

Black and white photograph showing male hands preparing glass for fusing. Same photo as 144. On front of image in ink: “24” On back of image in pencil: “No. 24 Glass Preparation for fusing” On back of image in ink: “24”

Black and white photograph showing young man (Notman) working on graphic designs at a draft board. On front of image in ink: “19” On back of image in pencil: “Notman No. 19” On back of image in ink: “19”

Black and white photograph showing Gordon Crickmore using compass. Same photo as 136. On front of image in ink: “16” On back of image in pencil: “No 16 Gordon Crickmore” On back of image in ink: “16”

Black and white photograph Dick Huey at work assembling plate glass for making gla blocks. Same photo as 147 On front of image in ink: “27” On back of image in pencil: “No 27” On back of image in ink: “27”

6 colour polaroid photographs showing different angles of Glass donut for 2.8 MEV Betatron (Reg 61) (269.1,269.2, 269.3, 269.4, 269.5, 269.6) Photographs are of Reg 61: Glass donut for 2.8 MeV Betatron

White Castell rectangular slide rule (270.1) stored in clear plastic Faber Castell case (270.2). On slide rule: printed - “Castell”, On case: stamped - “Made in Germany”, in pen - “451”, Paper label: “Castell 57/89”

Plastic white rectangular Castell slide rule (271.1) stored in green lined rectangular case (271.2). On slide rule in green font: “Castell”

The Joly meldometer was created to determine the melting point of minerals. W.E. Wilson, an astronomer and author, stated in 1900 that the Joly meldometer consisted of a ‘a strip of platinum on which minute fragments of any mineral can be placed, while any alteration in its length can be determined by means of a micrometer screw which touches a lever connected with one end of the strip. The strip can be heated by an electric current, and is calibrated by observing the micrometer readings corresponding to the temperatures at which some substances of known melting-points melt’i . One reason why the Joly meldometer was seen as a successful addition to science was the small amount of any substance that it required for testing. Only a minute sample was needed for the instrument to work and so a tiny part could be taken from a delicate item without destroying itii . The instrument was originally manufactured by the Irish company Yeates & Son of Dublin. The Yeates family business was established in the early 1790’s and is thought to have operated until approximately 1922iii . Their business slogan was recorded as ‘Instrument makers to the University’, a slogan which proudly exhibited their relationship with Trinity College, Dublin. The company was located directly opposite Trinity College, the place where the Joly meldometer was created. Working in such close proximity must have assisted this business relationship. The inventor of this meldometer was Irishman John Joly. Joly was born in 1857 at the Church of Ireland Rectory, Hollywood House. His education led him to Trinity College Dublin where, by 1891, he had obtained a Bachelor of Engineering degree as well as a Doctorate of Science. The entirety of his working life appears to have taken place at Trinity College although he is known to have travelled in order to consult with other scientists such as the world renowned Sir Ernest Rutherford. The Joly meldometer was used for a variety of different purposes, with scientists often adapting the instrument to suit their own needs. For instance, the previously mentioned astronomer W.E. Wilson adapted the meldometer to assist him in measuring the radiation of the suniv . Joly used his device in an attempt to ascertain the age of the earth. In 1913, along with Sir Rutherford, Joly came to the conclusion that the earth was approximately 400 million years old. They did this by analysing the decay of radioactivity in minerals. According to our present knowledge of the earth this was a much more accurate date than the dates Joly had previously derived. He had first thought that the earth was 97 million years old due to the volume of sodium in the oceans. Joly’s second analysis of the topic had resulted in the age of 80 million years. This figure was based on the accumulation of sediment. Apart from designing his meldometer, Joly is also remembered for his work with colour photography. In 1894 Joly discovered a method for creating colour photographs from a single platev . He also studied the use of radiation as a treatment for cancer and persuaded the Royal Dublin Society to establish the Radium Institute to assist hospitals. In 1933 Joly passed away at the age of seventy-six.

The spectrograph employs the principle of single crystal Bragg X-Ray Diffraction to measure wavelengths by interpolation from accepted standard lines. It is suitable for the identification and determination of the charateristic emissions of elements and thus for X-Ray spectrum analysis. The instrument was manufactured by ADAM HILGER Ltd. to the design of Professor Laby and is the best preserved instrument surviving from his research activity. A full description is given in the Hilger Pamphlet with the instrument; alternatively see duplicate in Appendix A5,A6 in Vol 2 of Laby ‘s COLLECTED PAPERS.

This is the prototype of Laby’s X-Ray Spectrograph (cat. no.274) and was constructed in the Nat. Phil. workshop.

A student demonstration or general laboratory model capable of calibrating the pitch of the mechanical thread in terms of the wavelength ofvisible light, specifically a chosen emission line from the spectra of say mercury.