Builit in 1950s and used till the mid 1970s within the Physics Department used in Melbourne. John Rouse and David Caro was involved in the construction.Black and white photo of cyclotron (nuclear physics accelerator): Main switchboard. Sticky typed labels on back from top and left to right: “MAIN SWITCHBOARD” Handwritten in pencil on upper left hand corner: “9” Handwritten in pen on bottom right hand corner: “AC power in from substation”

Builit in 1950s and used till the mid 1970s within the Physics Department used in Melbourne. John Rouse and David Caro was involved in the construction.Black and white photo of cyclotron (nuclear physics accelerator): H.V. Power supplies & acceessories. Sticky typed labels on back from top and left to right: “4KV DRIVER POWER SUPPLY, 14KV RECTIFIER SET, 14KV CHOKE, OIL PUMP & HEAT EXCHANGER” Handwritten in pencil on top left hand corner: “6”

Builit in 1950s and used till the mid 1970s within the Physics Department used in Melbourne. John Rouse and David Caro was involved in the construction.Black and white photo of cyclotron (nuclear physics accelerator): Arc Stabiliser Control Chassis. Sticky typed labels on back from top and left to right: “ARC STABILIZER CONTROL CHASSIS” Handwritten in pen on bottom left hand corner: “God knows”

Builit in 1950s and used till the mid 1970s within the Physics Department used in Melbourne. John Rouse and David Caro was involved in the construction.Black and white photo of cyclotron (nuclear physics accelerator)Focusing lens generators. Duplicate of 202 Sticky typed labels on back from top and left to right: “FOCUSSING LENS GENERATORS”

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo showing a close up of hands handling equipment, same as in no 127.In ink on lower left hand corner : “14”

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo showing Gordon Crickmore using compass on drawing board. Same photo as 267In ink on lower left hand corner : “16”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo showing close up of glass optical flat in case. Photographed label reads: “Glass optical flat. Made by Natural Philosophy Laboratory. Melbourne University. Certificate Number 18. Accuracy of surface, flat within .000,001 (unmarked surface). Accuracy of surface, within .000,002 inch (marked) “use other side”. A photograh in Cd red light of the interference fringes of this flat when placed on a standard glass flat is shown above. Initials: [signature]. Tests made by: [VDH signature]. Certificate issued by T.H.L. Date: Feb 19th 1941.In ink on lower left hand corner : “17”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of E.R. Johnson using equipment.In ink on lower left hand corner : “18”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of Notman working on graphic art.In ink on lower left hand corner : “19”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of E.R.Johnson testing fused sandwiched plate glass in a polarimeter. N.B. As at time of writing it is not certain that the “man” pictured in nos. 147 and 149 is the same individual as pictured in no 140. (EGM. 11/11/99)In ink on lower left hand corner : “20”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of R.L.Abbey looking through telescope of optical spectrometer..In ink on lower left hand corner : “21”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo shows Eric Burhop operating an optical pyrometer ....with possibly a vacuum furnace?In ink on lower left hand corner : “22”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of Optical Munitions Panel meeting (September 1943) of 11 members: L to R: Lt. Col. G.H. Adams; G.H. Briggs; Mr (Sr) Richard v.d.R. Woolly; E.O. Hercus; H.J. Frost; Prof. Kerr Grant (S.A.); Prof. T.H. Laby; Harrigan; J.S. Rogers; Prof. A.D. Ross (W.A.); Prof. T. McAuley (Tas)In ink on lower left hand corner : “23”

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of hands operating glass cutter, producing rectangular strips in preparation for experimental fusing of glass “sandwiches” into optical blocks. Same photo as 265In ink on lower left hand corner : “24”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo showing four assorted optical prisms on a black background. A fifth specimen shows a sandwich glass “prism” assembly prior to cutting and polishing. In ink on lower left hand corner : “25”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of Bob Caldwell cutting through glass “sandwich” using a diamond saw.In ink on lower left hand corner : “26”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of man, possibly Eric Johnson, assembling glass “sandwich” prior to fusing. N.B. As at time of writing it is not certain that the “man” pictured in nos. 147 and 149 is the same individual as pictured in no 140. (EGM. 11/11/99) Same photo as Reg No. 268In ink on lower left hand corner : “27”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of Peter Law and A.C. Goodwin examining optical glass specimens.In ink on lower left hand corner : “28”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of man, possibly E. R. Johnson, examining rectangular glass “sandwich” block in light. N.B. As at time of writing it is not certain that the “man” pictured in nos. 147 and 149 is the same individual as pictured in no 140. (EGM. 11/11/99)In ink on lower left hand corner : “29”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of J.L. Richardson and -- Dean using an optical bench to test a lens. Lab books are also visible.In ink on lower left hand corner : “30”.

Small cylindrical metal rod with diamond point embedded at one end and a brass circle with 50 divisions and a pointer affixed at the other end to define the orientation of the rod/diamond point. Presumably used with one of the Grayson or Stone engines.On face: “0 10 20 30 40”

Glass rectangular slab stored in brown cardboard box.?? Stamped on back of box: “ExD 40 3453A ECLORTRA” (this may be unrelated)

A microscope slide 3-1/2 in. x 1-1/2 in. to which is cemented a glass rectangle 1-1/2 in. x 1 in. and marked by Grayson as “1 inch”. Possibly a “standard inch” for use on a comparator? (Not very important)Pink label: “Inch”

Black and white print of multiple beam interference fringes showing depth of etching

Black and white print of multiple beam interference fringes showing depth of etching

Black and white print of multiple beam interference fringes showing depth of etching

Black and white print of multiple beam interference fringes showing depth of etching