Short glass Geiger counter tube with evaporated gold cathode.

As for Cat. 58 demonstrating GM Tube prior to evaporation of cathode.

Boron Triflouride neutron proportional counter. Long glass tube covered in black enamelCello taped label: “20th Century Electronics” “Type G.60 Operate at 1250 Volts No. KK854” “Made in England”

Glass donut with injector arm and attached wires. Internal surface is sand blasted and silver plated. Mounted on specially made demonstration stand. Reg 269.6 is photographs of the object.Plaque on mould: “Glass Donut for 2.8 MEV Betatron W.B.Laish and L.Riddiford 1946”

Certificate of Examination for #64 of one 6 inch glass scale, one 6 inch steel scale, and one 6 inch end gauge for Professor Lyle. 3 page document (copy) from National Physical Laboratory, Teddington. Paper held together with pin. (See also #63)

U.S. Bureau of Standards Certificates for #65 for 6 inch steel scale, 6 inch steel end measuring rod, 6 inch glass scale. Three Department of Commerce Bureau of Standards certificates submitted by Professor Lyle for scales made by H.J. Grayson. Held together by paper clip. (See also #62)

(1) Glass rectangular scale (1-(1)-6 inch); (2)ditto steel rectangular scale, (3) ditto metal cylindrical rod. Enclosed in black hinged box with purple velvet lining. 64.1 = steel scale, 64.2 = glass scale, 64.3=steel rod, 64.4 = box. See#62 “National Physical Laboratory Certified Standards”On top of box labels: “Length Standards 3BA”, “National Physical Certified Standards 1.6 inch steel scale. 1.6 inch glass scale, 1.6 inch rod. For particular see certificate 1915” “40 6”. On glass scale engraved: “13.0 cNP” Engraved on steel scale “H.J.G. Melb Univ. 1915 ruled at 12.9 Celsius” . On glass scale engraved: “H.J.G. Melb Univ. 1915” “1,2,3,4,5,6”. (H,J,G, = Henry Grayson)

#S 66&67 CONSTITUTE A SET Brass cylindrical optical element erected on wooden rectangular base. Engraved on barrel: “Husbands Optician. Melbourne & Bristol”. “scale”. “90” on barrel near scale.

Brass cylindrical optical element erected on wooden rectangular base.

Brass cylindrical optical element erected on wooden rectangular base. Label on base: “Nat. Phil. Lab No. Univ. of Melb”

Brass cylindrical optical element erected on wooden rectangular base. Scale round perimeter. Label on base: “Nat Phil No. Univ. of Melb”

Glass rectangular slab consisting of 11 glass plates “welded together”. Slab is concave and squashed on top. Base shows two black lines. An early attempt to manufacture bulk optical glass.

Glass rectangular slab consisting of 15 plates “welded/squashed together”. Slab is concave at top. See no 70 for details.

Black and white photograph of Professor Laby with optical munitions equipment. Glued on cardboard backing with red border: “Professor Laby Optical Munitions 1943”. Hand written on back of cardboard: “Professor Laby Optical Munitions 1943”. On back of cardboard stamp: “University of Melbourne School of Physics Archive”Typed label and under photo “

Rectangular galvanometer made of black enamelled metal. Made in Melbourne, Australia by JL WilliamPlaque on front: “Direct Current Galvanometer Resistance 65 ohms, critical resistance 1100 ohms, sensitivity 1250mm/ma, Instrument No. 441.5.JL. William Melb. Aust.”

Black and white photo of Professor Hartung working with optical glass. Glued on cardboard backing with red border.On back of frame hand written: “Prof Hartung Chemistry School of Optical Glass 1943?” “Stamp” “University of Melbourne School of Physics Archives”

Black and white photograph of Dick Johnson using a polarimeter. Photo is glued on cardboard backing with red border.Hand written on back: “Optical Munitions E.R. (Dick) Johnson MSc candidate on polarimeter”. Stamped on back: “University of Melbourne School of Physics Melbourne”

Metal hollow vessel with glass insert opens at one end. At opening metal round plate is perpendicular and has brass cylinder attached.

Polished metal cylindrical X-ray dosimeter stored in red rectangular cardboard box. 26.1 = box 26.2 = dosimeterEngraved on dosimeter: “C1948” On box: “C.K. Dosimeter”;”Sole Distributors Cinema Television Ltd Lower Sydeham London S.E.26”

Vernon Harcourt’s Standard Pentane Lamp, consisting of the following components: 27.1: Wooden hinged box with key 27.2: Glass Pentane lamp 27.3: Metal clamp attachment 27.4: Empty glass bottle 27.5: Glass bottle stopper 27.6: 1.5 CP weight 27.7: 1 CP weight 27.8: Small metal bullet 27.9: Instruction sheet Miscellaneous: 2 screws to be reattached to lamp green small piece of glass small flat rectangular piece of metal cotton woolLabel on front of box (27.1): “1K5”; “Natural Philosophy Laboratory No. University of Melbourne” Label on inside of box (27.1) “Negretti and Zambra Opticians Meteorological Instrument Makers to the Queen To the Prince of Wales The Royal Observatory Greenwich The British Meteorological Society Admiralty, Board of Trust, Royal National Lifeboat Institution. Holborn Viaduct. 45 Cornhill. 122 Regent Street & Crystal Palace London” (emblem also included on label). Plaque on lamp (27.2): “Nat. Phil. Lab No. Univ. of Melb.”; “Vernon Harcourt Standard Pentane Lamp No. 2. Made by Woodhouse & Rawson Electrical Manfg Coy No. 4590” Label on clamp (27.3): “Nat Phil. Lab. N. Univ. of Melb” Moulded on glass bottle (27.4): “4 oz” Inscribed on weight (27.6): “1.5CP” Inscribed on weight (27.7): “1 CP”

Wooden box (28.1) containing the following (11 items + 2x21disks (sets A &B): 28.2: black enamelled harmonic analyser (main body,serial no. 37 28.3: plastic slide rule (40 inch) 28.4: Instruction manual 28.5: Long steel metal rule (92 cm) with handles 28.6: Wooden clipboard with paper 28.7: brush 28.8: fixed arm planimeter Serial No. 25498 - 4 components and box 28.9: fixed arm planimeter Serial No. 25499 - 4 components and box 28.10 Harmonic analyser black piece 28.11 Harmonic Analyser long metal attachment 28.12 Harmonic Analyser short metal attachment 28.13 - 28.55: 42 metal discs (not numbered individually) 28.56 Key to box (not numbered)Front right hand side of box in texta: “GW7446”; on inside lid of box: “GW7446”; On harmonic analyser in white: “No. 3 Harmonic Analyser Stanley London Serial No. 37. Made in England”; On clipboard (28.6): ?“P.Cholec Shade”; Stamped on brush (28.7): “Made in England Pure Bristle”; Label in planimeter box (28.8): “7/124/F/152/500 Fixed Arm Planimeter Serial No. 25498. 1 Rev = 100 sq. cms. Constant = 18.676”. Inscribed on planimeter (28.8): “Albrit 25498 Made in England” Label in planimeter box (28.9): “7/124/F/152/500 Fixed Arm Planimeter Serial No. 25499. 1 Rev = 100 sq. cms. Constant = 18.676”. Inscribed On planimeter (28.8): “Albrit 25499 Made in England” On discs 28.13-28.55: Half are “A” disk and half are “B”. All are inscribed.

Microtome for cutting resin embedded tissues for electron microscopy. In 1957 a modified hodge microtome redesigned and built by H.A. Waters of the Melbourne University Department of Physics was acquired. The Waters microtome is of thermal expansion type - the rod “A” is heated and by expansion pushes the resin block forward by a fraction. It is mounted on a long cast iron base. The movement of the block is eccentric drawing the specimen away from the knife after cutting, The glass knife ‘B’ is adjustable by means of a modified microscope column screws ‘C’. The microtrome is driven by a continuous action electric motor mounted on the common base. Hand cutting can also be done. The cutting was controlled by viewing through a Leitz Binocular microscope mounted on the same base. The original microscope was subjected to nine modifications by Dr S Weiner from whose PhD Thesis (1962) ‘Electron Microscopical Studies of the Liver’ this information was obtained. (text provided by Professor H Attwood) Microtome made of metal and enamelled in light blue. Components are identified by the use of stick on labels. The microtome is mounted on a long cast iron rectangular base and has an electrical cord for connection to a power point.Plaque on back: “Pathology Department, University of Melbourne Serial No. 0091. Date: 7/7/1968”

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

Demonstration cut-away model of a liquid nitrogen trap for vacuum system, consisting of two coaxial copper tubes, diameters approx. 3 and 2.5 inch resp.

From label: Remnants of the “J” Apparatus beam balance for the measurement of the mechanical equivalent of heat. The solid object is the rotating magnet the construction of which is illustrated on the cover of \\\"A man Ahead of his Times\\\". Made in the Nat. Phil. Workshop for J experiment.Three components of “J” Calorimeter made of metal and covered in green enamel. One small weight from 33.3 has become detached from string.

Gas-powered engine used to drive Grayson’s original ruling engine (Cat. no. 35) Because of frequent failures of the electric power supply, Grayson preferred to use a hot-air engine, driven by a gas flame, to turn the engine so that, once a ruling had commenced, it would continue uninterrupted until the end.

Made by Henry Grayson at home with the help of William Stone. Used to rule diffraction gratings, achieving excellent results of 2cm squared rulings on speculum metal. The instrument was transferred to Melbourne University, and used by Professor Lyle from 1917-30. Information attached to the front of object and statistical information on stand on top of object.Grayson Diffraction Grating Ruling engine consisting of multiple complex chrome and brass components. Enclosed in specially made glass and wooden display box.

Cambridge Optical Pyrometer constructed with round black face erected on wooden tripod. A single yellow wire about 1 metre length is left floating (i.e. wrapped round one leg).On face: “Degree Centigrade Cambridge Optical Pyrometer ?The Cambridge Scientific Instrument Co. Ltd Cambridge England No. 42610”

Double Prism Optical Spectrograph made of standing L-shaped metallic base in grey enamel which supports a brass collimator/telescope abutting a wooden box containing two prisms and camera. Tradition has it that it was designed by Laby but there is no supporting evidence.Engraved on brass cylinder: “Adam Hilger Ltd London England” On end of brass cylinder: “Screw = 5m/m Adam Hilger Ltd London England No. F31.301/25403”