274 
MODERN GUNPOWDER AND CORDITE. 
Fig. 4. 
GUIPOWBEE TREE.—£wtc». 
QUICK FIRING 
shewn, viz.: 3 of sulphur, 79 of saltpetre, 18 charcoal and water 1*7 
and 2*2. The charcoal being composed of carboii, oxygen and hydrogen, 
straw being the material used for the new charcoal, and willow, dog¬ 
wood or alder for the other. Along the stem of the tree the different 
operations are shewn, and the sketch is intended to present in an easily 
remembered form, the outlines of manufacture of gunpowder, and the 
