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.

Copies of the Lyle radiograph (see below) are on file with the letter (9Sept 1982) from J F Richardson (Australian Radiation Laboratory, as it was then called) detailing the description of the reproduction as follows: RADIOGRAPH OF PROFESSOR ORME MASSON'S FOOT! MOST PROBABLY THE FIRST RADIOGRAPH TAKEN IN AUSTRALIA. TAKEN BY PROFESSOR LYLE ON MARCH 3RD, 1896 USING A CROOKES DISCHARGE TUBE OF HIS OWN CONSTRUCTION

White & Gillespie “Dualface” comprehesive slide rule Model 432 In original cloth covered case“Dual face” Comprehensive Slide Rule Model 432 Melbourne > W&G

ODHNER/BRUNSVIGA TYPE keys: 10 x 8 x 13 [donated by Jack McDonell (6 Mar 1997) who salvaged it when being discarded from UniMelb Physics III Labs in the 1950s. same as 289/M13 Serial No 3-2381

ODHNER/BRUNSVIGA TYPE MULTO model 13or 113 keys: 10 x 8 x 13 same as F288/M1

A Brunsviga twin-system with keys 10x10x20 and 12x20. Plaque: TRINKS Double System / GRIMME NATALIS & Co / Braunschweig / AND Brunsviga Calculator Co. / London, Brunsviga House / Snow Hill EC1[London] / Manchester, WIlliam Brown Street / Glasgow, 20 West Campbell St.

S.C.M. HAMANN Mechanical Type 505 Ser. no. 501354 Donated by Institute of Applied Economic and Social Research keys: 9 x 8 x 16 ELECTRICAL! HANANN Rechenmaschinen GMBH Berlin SW61 (West G)

Sheet of operating instructions which mentions that O. Steiger is the Patentee. On separate stand about 600mms high Plaque: ‘Sole Agents for Australia / Peacock Bros. PtyLtd / Business Systems / Melbourne, Sydney, Adelaide, Brisbane, Perth’

Plaque: ‘Hans W Egli/Ingenieur / Fabrikation von flechenmashinen [sic; ?] / Pat. O, Steiger / Zurich II / No 2566. Sole Agents for Australia / Peacock Bros./ Business Systems Company / 558 , 560, 562 Collins St., Melbourne / and at / Sydney, Adelaide, Perth’ Plaque: ‘Presented to . / Department of Information Science / Melbourne University / by the / Gas & Fuel Corporation of Victoria / This calculating machine was used by Engineers of the Metropolitan Gas Co and Gas & Fuel Corporation / from 1917 to 1970’

Plaque: Made by Atvidaberg - FACIT / Sweden keys: 8 x 13 x 13

keys: 16 x 9 x 16 Plaque: ‘Sydney Pincombe Pty Ltd, Sole Australian Agents Made by ....FACIT/ Sweden/ same as M11

Keys: 10 x 19 x 10 Plaque: Made by Aktiebolaget FACIT/ ATVIDABERG / SWEDEN’ Black enamel, painted “V”; good working ordeer

Keys: 16 x 9 x 16 ( A note states: ‘Possibly Model No LX (1945) See Sabielmy’s book (1939) Plaque: (See 297/M9 ....Sydney Pincombe ...)

Keys: 13 x 16

keys: 12 Plaque: ‘Supplied by Bell Punch A’sia Ltd / 160 Castlereagh St., Sydney / 27 Little Collins St., Melbourne / Agents and Services in all states / BPC / Cash Control Systems, Adding Machines, Ticket Registers, Charge Machines / Ticket Printers, Gum Tape, Scaling Machines etc. /’ good working condition

8 digits

See F23

Output on Paper Roll Plaque ‘S.A. Burroughs/Paris. Made in France / Universel (sic) A.P. Series J/ Volts 240 AMP 0.2’

Plaque: ‘Burroughs/Detroit/ Mich / USA’

keys: 8 / 13

keys: 11 x 9 x 16

X key A BIG MACHINE Ser no 200949

keys: 13 x 8 x 13 Plaque: ‘School of pHysics [University of Melbourne]/

see #313

Felt & Tarrant Mfg Co, Chicago, USA Note;’For history see extract from EM Horsburgh (editor) “Modern Instruments of Calculation” pp. 98-102. New introduction by Michael R Williams (1st 1914, 2nd 1984). TOMASH Publishers, Los Angeles, San Francisco.

Paper tape output Plaque ‘Tokyo Electric Co Ltd, Made in Japan