440 



TRANSACTIONS OF THE AMERICAN INSTITUTE. 



easier than the castings GC projecting the cover R in advance, 

 canister is also adapted to smooth bore guns. 



The same 



THK CARKIAGES. 



The following figure represents my field gun mounted on my carriage, 



when limbered up and 

 the locking shoe ad- 

 justed as prepared to 

 descend a hill. This 

 cut is a cross 

 section on the 

 line SS of the H 

 trail 



The stock is 

 made in tlie form re- 

 presented, and attach- 

 ed to the under side 

 of the axle by means 

 of the bolts connected 

 with a strong saddle 

 resting on the top of 

 the axle, as shown in 

 the figure. By this 

 means I am enabled to 

 give a greater degree 

 of elevation to the 

 piece, and, at the same 

 time, maintain the 

 proper strength in the 

 carriage to sustain 

 the recoil when fired 

 at such high elevation, 

 and the carriages of a 

 battery thus construct- 

 ed occupy but about 

 two-thirds of the space 

 occupied by the com- 

 mon United States 

 carriage, when packed 

 for transportation on 

 cars or ships. It 

 gives I'oom, also, to fix 

 sponge and rammer, 

 as seen in the figure, 

 on top of the trail, 

 where they are not 

 exposed to being torn 

 off or broken, as if 

 below the trail. The 

 cheeks embrace the 

 upper portion of axle, 



