For the proof of powder for small arms, the small balistic pendulum is a simple, convenient, and accurate instrument.
Common eprouvette.
The common eprouvettes are of no value as instruments for determining the relative force of different kinds of Gunpowder.
OF THE SIZE OF GRAIN FOR GUNPOWDER.
On size of grain.
With regard to the particular size of grain for Gunpowder, I am confident great improvements might be made, both in obtaining greater regularity of effect and propelling force, by the adoption of a more uniform even grain. There are at present half-a-dozen different sizes in our cannon and musket powder; and I think it stands to reason, that the more equal the size, the more uniform will be the ignition of all the grains, and consequently the effect of the same charges will be much more regular.
OBSERVATIONS ON THE MANUFACTURE OF GUNPOWDER ON THE CONTINENT AND AMERICA.
It may not be uninteresting to have a slight knowledge of the method employed on the Continent, &c., for the production of Gunpowder.