472 



TRANSACTIONS OF THE AMERICAN INSTITUTE. 



etc., would, when fired, send the boat many yards astern, in smooth water. 

 And yet the application of this force produced no effect on the frame of the 



S1I5 



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a a 



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o g .2 



boat— not even the paint over the plank-ends having been disturbed by a 

 hundred rounds, fired chiefly when the boat was under full way. 

 The field carriage is of wrought iron and weighs 500 pounds. 



MMBERS 



Are provided, that the service of boat howitzers need not be confined to 

 the sea coast. 



