The Australian War Memorial Collection. Test site
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: MR. ELWYN ENGAGED IN MAKING A GAUGE DESCRIBED IN 5926. (NEGATIVE BY E. CRANSTONE).
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: SELECTING A GLASS FROM SUPPLY OF SPECTACLE GLASS - THE ONLY OPTICAL GLASS OBTAINABLE HERE. MR. E.J. ELWYN LATE LECTURER OF MANUAL ARTS AT SYD. U
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: NEW OPTICAL SYSTEMS ARE CONTINUALLY BEING DEVISED. HERE IS DR. WOLLEY AND MR. BANHAM DISCUSSING A NEW PROJECT. (NEGATIVE BY E. CRANSTONE).
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: COMPLETED LENS IS FITTED TO PARTICULAR GUN SIGHT. MR. H. BANHAM - SENIOR MECHANIC ON THE PERMANENT OBSERVATORY STAFF FITS THE LENS TO A MILITARY
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: DR. WOOLLEY, DIRECTOR OF THE COMMONWEALTH SOLAR OBSERVATORY TAKING A SIGHT THROUGH COMPLETED INSTRUMENT. (NEGATIVE BY E. CRANSTONE).
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: LENS ARE MOUNTED ON SPHERICAL BLOCK WITH PITCH AND THEN GROUND & POLISHED ON THIS REVOLVING WHEEL. A REFUGEE FROM ENEMY OCCUPIED COUNTRY IS ENGA
MT. STROMLO, MAKING OF LENSES FOR MILITARY INSTRUMENTS: AFTER FINAL POLISHING LENS IS TESTED WITH SODIUM MONOCHROMATIC LIGHT. THE LENSES MUST CONFORM TO AN ACCURACY OF ONE TWO MILLIONTH OF AN INCH OVE
