013145
Photograph 013145 Second World War, 1939-1945BOMB SHAPE IS IMPORTANT AND HERE THE OPERATOR IS TESTING THE CONCENTRICITY OF A 250-LB. BOMB BODY IN AN AUSTRALIAN MUNITION WORKS. (NEGATIVE BY BOTTOMLEY).

The Australian War Memorial Collection. Test site
THE 250-LB. BOMB BODIES ARE MADE TO A HIGH DEGREE OF ACCURACY, AND THE OPERATOR IS HERE SHOWN CHECKING THE THICKNESS OF THE BOMB CASING WHICH MUST BE CORRECT TO WITHIN .008 OF AN INCH. (NEGATIVE BY BOTTOMLEY).
BOMB SHAPE IS IMPORTANT AND HERE THE OPERATOR IS TESTING THE CONCENTRICITY OF A 250-LB. BOMB BODY IN AN AUSTRALIAN MUNITION WORKS. (NEGATIVE BY BOTTOMLEY).

MORTAR BOMBS ARE AMONG THE MANY WAR COMMODITIES AUSTRALIA IS PRODUCING IN VAST QUANTITIES FOR EMPIRE NEEDS. BEFORE BEING FILLED WITH EXPLOSIVE, THE MORTAR BOMB MUST PASS THOROUGH TESTS. WORKMAN ON LEF

THESE LENGTHS OF STEEL ARE CONVEYED SLOWLY THROUGH A FURNACE WHICH HEATS THEM TO THE REQUIRED TEMPERATURE FOR ROLLING BETWEEN ROLLS OF THE HAND OPERATED MILL SHOWN IN THIS PHOTOGRAPH. BY THIS MEANS, T

No 7 Mk 1 tail fin for high explosive and general purpose bombs. The tail assembly consists of a mild steel cone which fits over the base plate of a bomb casing and is secured to it by four spring cli
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

THE TEMPERATURE, WHICH IS AS HIGH AS 1400 DEGREES CENTIGRADE, IS MEASURED CONTINUOUSLY WITH AN OPTICAL PYROMETER. THE PROCESS TAKES APPROX. 12 HOURS AND CORRECT TEMPERATURE MUST BE MAINTAINED THROUGHO
