270 
MODEEN GUNPOWDEE AND COEDITE. 
almost identical in appearance. With one class, the modern, the mag¬ 
nificent shooting of our prize rifle matches is obtained. The other, 
which represents the older gunpowder, is rejected as useless by civil¬ 
ised nations and, fortunately, (or unfortunately ?) relegated to the 
inhabitants of Darkest Africa and other simple folk who are easily 
satisfied with any compound containing a sufficiency of villainous 
saltpetre.” We can further emphasize the difference between old and 
modern gunpowders by comparing the manner in which pressures are 
developed by them ; and I submit a sufficiently characteristic example 
in the diagrams Fig. 1 and Fig. 2 now before us. Even after the 
Pig. l 
R.L.C. POWDER* 
