Black Powder
Gunpowder Breaking-Down Machine, No. 11
The mill cake from Incorporating Mill, No. 5, is here tipped into hopper shown at left hand and elevated above the breaking-down rollers, the top pair being fluted and the lower ones plain, the conjoint function of which rollers is to convert the pieces of cake into meal, in which state the boxes below receive same. For safety, the whole framework is solid gun-metal, so are also the gearing rollers, and exposed metal portions of the machine.