The Australian War Memorial Collection. Test site
PROFESSOR HARTUNG PLACES A POT IN THE FRESHLY LIGHTED FURNACE. THE POT MUST BE HEATED SLOWLY TO PREVENT CRACKING. THIS TAKES AS LONG AS 8 HOURS. (NEGATIVE BY E.L. CRANSTONE).
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
OWING TO THE TERRIFIC HEAT TO WHICH THE POTS ARE SUBJECTED, THEIR COMPOSITION MUST BE PERFECT. THIS PICTURE SHOWS A POT THAT COULD NOT STAND UP TO THE INTENSE HEAT. (NEGATIVE BY E.L. CRANSTONE).
AFTER BEING COOLED SLOWLY OVER NIGHT, THE POT IS TAKEN OUT AND BROKEN APART. MR. G. AMPT. SENIOR LECTURER IN ANALYTICAL CHEMISTRY. (NEGATIVE BY E.L. CRANSTONE).
THE MIXTURE IS POURED INTO THE POT THROUGH A TUBE. DR. E. HEYMANN, WHO IS ASSISTING THE PROFESSOR IN HIS RESEARCH IN THIS OPERATION. HAND HOLDING TUBE IS WRAPPED IN TOWEL AS HEAT IS TERRIFIC. (NEGATIV
CLAY POTS ARE USED TO MAKE THE GLASS. THIS EXPERIMENTAL POT IS QUITE SMALL. POTS USED ULTIMATELY WILL BE SEVERAL FEET IN DIAMETER. (NEGATIVE BY E.L. CRANSTONE).
MAKING 10-LB. BOMBS: THE FURNACE IN WHICH THE METAL IS HEATED. (NEGATIVE BY CRANSTONE).
