Tests Nos. 1 to 5 in Gallery No. 1, as set forth in preceding circular.

_8.--Trauzl Lead-Block Test._

Powder and test numbers, expansion of bore-hole in cubic centimeters,
and average expansion compared with that produced by a like quantity (10
grammes) of 40% dynamite, the latter giving an average expansion of 294
cu. cm.

_9.--Pressure Gauge._

Powder and test number, weight of charge, charging density, height of
curve, pressure developed, and pressure developed after cooling,
compared with pressure developed after elimination of surface influences
by a like quantity (100 grammes) of 40% dynamite, the average being
8,439 kg. per sq. cm.

_10.--Rate of Detonation._

Powder and test number, size of cartridge, and rate of detonation in
meters per second, for comparison with rate of detonation of 40%
dynamite, which, under the same conditions, averages 4,690 m. per sec.

_11.--Impact Machine._

Explosive and test numbers, distance of fall (2,000-gramme weight)
necessary to cause explosion, for comparison with length of fall, 11
cm., necessary to cause explosion of 40% dynamite.