inserted. The charge is customarily 100 grammes. On detonation of the
charge, a deformation of the lead takes place, the amount of which is
due to the quickness of the explosive used (Fig. 3, Plate VIII).

Sample Record of Tests.

The procedure followed in the examination of an explosive is shown by
the following outline:

1.--_Physical Examination._

(_a_).--Record of appearance and marks on original package.

(_b_).--Dimensions of cartridge.

(_c_).--Weight of cartridge, color and specific gravity of powder.

2.--_Chemical Analysis._

(_a_).--Record of moisture, nitro-glycerine, sodium or potassium
nitrate, and other chemical constituents, as set forth by the
analysis; percentage of ash, hygroscopic coefficient--the amount of
water taken up in 24 hours in a saturated atmosphere, at 15° cent.,
by 5 grammes, as compared with the weight of the explosive.

(_b_).--Analysis of products of combustion from 100 grammes, including
gaseous products, solids, and water.

(_c_).--Composition of gaseous products of combustion, including
carbon monoxide and carbon dioxide, hydrogen, nitrogen, etc.