The Australian War Memorial Collection. Test site
THE GLASS IS PLACED ON THIS LARGE TRAY READY FOR THE ALUMINIUM PROCESS. (NEGATIVE BY E.L. CRANSTONE).
THE TRAY CONTAINING THE GLASS SITS ON THE BASE OF THE VACUUM TANK WHILE THE LEAD OF THE TANK CARRIES THE FILAMENTS AND BAFFLE PLATES WHICH ARE ESSENTIAL FOR THE PROCESS. (NEGATIVE BY E.L. CRANSTONE).
THE GLASS MIXTURE IS CAREFULLY WEIGHED OUT, PRIOR TO BEING PLACED IN THE POT FOR MELTING. MR. G.M. WILLIS. (NEGATIVE BY E.L. CRANSTONE).
THE FINISHED OPTICAL GLASS. (NEGATIVE BY E.L. CRANSTONE).
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).
THE SQUARES ARE PLACED IN AN ELECTRIC FURNACE WHERE THEY ARE LEFT FOR SEVERAL DAYS TO FUSE TOGETHER - MR. J. C. NIVEN. (NEGATIVE BY E.L. CRANSTONE).
THESE PRISMS HAVE ALL BEEN MADE FROM THIS FUSED GLASS, AND ARE IN USE IN INSTRUMENTS DESIGNED AT THE UNIVERSITY. (NEGATIVE BY E.L. CRANSTONE).
