TM9-1904 - Ammunition Inspection Guide - 1944 PDF | Shell ...
The ball mill is a device consisting of a revolving steel cylinder in which iron or steel balls do the crushing. The pulverized charcoal and sulfur are then stirred into a saturated solution of saltpeter at a temperature of about 130 C (265 F) . The mass is then spread on a floor to cool, after which e0 it is ready for incorporation . The lumps ...