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

Rectangular clear glass plate.

5 glass clear thin slides each with yellow stained circular specimens (111.1 to 111.5) 1 clear blank slide (111.6)

Refer to Cat No 141 for full details. Black and white photo shows Ray Abbey looking through telescope of optical spectrometer. Duplicate copy of Cat no 141; in OMP Album Vol 2 #21. In ink on lower left hand corner: “21”. Inscribed on back in pencil: “No. 21 R.L.ABBEY”

Part of a series of optical munition snapshots 1940-1947. Refer to Cat No 133 for full details. Black and white photo shows Fred Caldwell looking through optical instrument. Duplicate copy of Cat no 133; in OMP Album Vol 1 #13.In ink on lower left hand corner : “13”. Inscribed on back in pencil: “No. 13 FRED CALDWELL”

Part of a series of optical munition snapshots 1940-1947. Refer to Cat No 146 for full details. Black and white photo shows Bob Caldwell cutting with a diamond saw through a sandwich of optical glass . Duplicate copy of Cat no 146; in OMP Album Vol 2 #26. In ink on lower left hand corner : “26”. Inscribed on back in pencil: “No. 26 ROBERT CALDWELL”

Part of a series of optical munition snapshots 1940-1947. Refer to Cat No 134 for full details. Black and white photo of optical instrument “director”. Duplicate copy of Cat no 134; in OMP Album Vol 1 #14.In ink on lower left hand corner : “14”. Inscribed on back in pencil: “No. 14”

Part of a series of optical munition snapshots 1940-1947. Refer to Cat No 138 for full details. Black and white photo shows E R Johnson performing (presumably) test of optical specimen. Duplicate copy of Cat no 138; in OMP Album Vol 1 #18 .In ink on lower left hand corner : “18”. Inscribed on back in pencil: “No. 18 E.R. JOHNSON”

Part of a series of optical munition snapshots 1940-1947. Refer to Cat No 137 for full details. Black and white photo of optical flat in de luxe case with certificate: “GLASS OPTICAL FLAT, made by Natural Philosophy Laboratory, Melbourne University” Number 18. Accuracy of surface flat within .000,001 inch .... Issued by (signd) T.H.L. Feb 19, 1941. Duplicate copy of Cat no 137; in OMP Album Vol 1 #17.In ink on lower left hand corner : “17”. Inscribed on back in pencil: “No. 17”

Part of a series of optical munition snapshons 1940-1947. Refer to Cat No 142 for full details. Black and white photo shows Eric Burhop operating a radiation pyrometer ....with possibly a vacuum furnace? Duplicate copy of Cat no 142; in OMP Album Vol 2 #22 .Melbourne University”In ink on lower left hand corner : “22”. Inscribed on back in pencil: “No. 22 E.H.S. BURHOP”

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of W.G. Kannaluik operating an Abbe refractometer.. (For 122.2 see record no 273: ditto as for 122.1 ... photo of TH Laby) In ink on lower left hand corner : “1”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of W.E.Agar manipulating an apparatus (possibly a sort of pantograph)In ink on lower left hand corner : “3”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of Fred Caldwell operating a stereoscope.In ink on lower left hand corner : “4”.

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of G.F. Dainty (with equipment unidentifiable)In ink on lower left hand corner : “5”.

Cylindrical tube piece of machinery with lens and coated in olive green enamel. Gauge measure visible.

Metal engineering piece showing circular measuring dial. Other dials visible. Lens also included.

Information sheet next to object details history, purpose and use. A pillar was constructed for the instrument in 1863.Heliostat consisting of brass cylindrical body on metal stand.Engraved on face: “J.C. Silbermann Invleur Tuit por J.Dubosq i Paris” “No. 119”

Declination instrument consisting of metal horizontal cylinder erected on brass three legged stand. A wooden rectangular box forms part of the instrument from which a horizontal telescope emerges (measurement of geographical meridian) and a vertical glass tube containing the suspension for the hollow magnet.Engraved on cylinder: “Elliott Bros London No.71”

Dip circle consists of a brass cylinder with two glass flat end-windows, containing a centrally mounted magnetic needle free to rotate about its supporting axis in a vertical plane. The needle , when at rest is arrested by a trunnion from which the needle can be raised by means of external knob. Very close to the needle is mounted the vertical circular scale. Two magnifiers are mounted at the end of a brass “diameter’ which can be rotated so as to read off the angular positions of both ends of the needle after being set up. Graduated horizontal scale on the base. Spirit level mounted. Tribach base.Engraved on base: “Robinson 38 Devonshire Street Portland Place London”