﻿ON CONSTRUCTING CANNON OF GREAT CALIBER. 19 



Unless this or some equally efficient remedy is adopted, any considerable increase 

 in the size of cannon must be hopeless ; for a surface as hard as a smith's anvil 

 would give way under the long-continued pounding of naked twelve-inch shot ; and 

 whenever hooped cannon may be made and used, it wUl be essential that the means 

 of preventing the lodgment herein given be always and at all times carefully ap- 

 plied. 



