NEW RIFLE POWDER.
The following mode of manufacturing rifle powder, appeared in Garrison Orders at Woolwich, 31st December, 1859:
Composition in 100 parts:—
| Saltpetre | 75 |
| Charcoal | 15 |
| Sulphur | 10 |
| 100 |
The charcoal to be prepared from dogwood, burned slowly in cylinders three hours. The composition to be worked under the runners for five and a half hours, and submitted to a pressure of about 50 tons to the square foot. The size of the grain to be that collected between sieves of 16 and 24 meshes. The grain to be glazed for five hours.
Note.—The foregoing, on the manufacture of gunpowder, is principally taken from an article in the Aide Memoire (1860), by Major Baddeley, Royal Artillery; Captain Instructor, Waltham Abbey.