
— 
bomb. This passage may be 
NEW FORM OF BOMB CALORIMETER. 143 
large experience, critical appreciation of the scientific demands, 
and means for insuring accuracy and finish of execution. Figure 
1 herewith represents the last form of bomb adopted. It differs 
from the first one and from the one made in Germany as above 
described, chiefly in the introduction of the ball-bearings (K K). 
A represents the cylinder, 
B the cover, and C the screw 
cap or collar by which the 
cover is held on the cylinder. 
The cover is provided with a 
neck (D). Into this fits, at 
the top, a cylindrical screw 
(E), into which in turn fits a 
valve screw (F). Intheneck / YG. Y 
(D), where the bottom of the /7 youu ji Sie 
cylinder screw (E) rests, is a oy Yi Ly Z 
shoulder fitted with a washer Ea AAI 
of lead. On the side of Dis 
an opening (G), into which 
may be screwed a tube con- 
nected with the receptacle 
which holds the oxygen used 
for the combustion. The 
tube when screwed in thrusts 
against a washer of lead at 
the end of G, which insures 
perfect closure. A narrow 
passage runs horizontally to 
the center of D, and then 
perpendicularly downwards 
through the cover, and thus . i 
provides passage fortheoxy- — | QWQWQWW;( (K \ 
Penmtoutue interior of the ; 

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Fic. 1.—CALORIMETER Boms. 
tightly closed by the valve screw, the lower end of which is conical 
and thrusts.against the inner surface of D, the angle of which at the 
place of contact corresponds to that of the tip of the screw. The 
upper edge of A is beveled on both sides, the apex being rounded, 
and fits into a washer of soft metal, which is held in a groove in 
the cover (B). Washers of lead have been used thus far. They 
yield to the heavy pressure and the metal gradually flows out of — 
