involved in the ConstriKtion of Artillery. 



381 



than half of the entire circumference of the gun (see Fig. 2) at the middle of the fragment. 

 The transverse section forms a sector of a circle of about 120°; and at the end next the 

 trunnions, where it is separated from the forepart of the gun, it forms a sector of about 90°, 

 as is shown at a, Fig. 3. It is evident to the Committee, as before stated, that the breech 

 part split into three large fragments; but it would appear, from the testimony of persons 

 on board at the time of the explosion, that, besides tliese, a number of small pieces were 

 thrown off" in diflerent directions, some of which are said to have passed through the sails : 

 of the number and size of these pieces, the Committee have no means of judging. 



Fig. 1. 



Fig. 2. Fig. 3. 



Fio. 1. — View of the fractured surface, and of the interior of the bore of the large fragments. 



Fig. 2 Section of the fragment across the large end nest tlie breech. 



Fig. 3. — Section across the small end of the fragment, shown in Fig. 1, near the trunnions. A — Outline of gini under 

 the trunnion-bands. B — Outline of gun at the breech. 



Scale. — Three-fourths of an inch to the foot. 

 VOL. XXIII. 3 D 



