3o8 SUB-MARINE #SS2l. 



When the wood-fcrew was fixed, and to be caft off from 

 its tube, the magazhie was to be caft off llkewiie by un- 

 fcrewing it, leaving it lianging to the wood-lcrew ; it was 

 lighter than the water, that it might rii'e up againft the ob- 

 jed:, to which the wood-fcrew and itfelf were faftened. 



Within the magazine was an apparatus, cOnftrUfted to 

 run any propofed length of time, under twelve hours ; when 

 it had rvm out its time, it unpinioned a ftrong lock refem- 

 bling a gun lock, which gave fire to the powder. This 

 apparatus was fo pinioned, that it could not poffibly move, 

 till, by cafting off the magazine from the veffel, it was fet 

 in motion. 



The Ikilful operator could fwim fo low on the furface of 

 the water, as to approach very near a fhip, in the night, 

 without fear of being difcovered, and might, if he chofe, 

 approach the ftem or ftern above water, with very little dan- 

 ger. He could fink very quickly, keep at any depth he 

 pleafed, and row a great diftance in any diredlion he de- 

 fired, without coming to the furface, and when he rofe to 

 the furface, he could foon obtain a frefh fupply of air, 

 when, if neceffary, he might defcend again, and purfue 

 his courfe. 



No. 3. 



Experiments made to prove the ?iature and life ofafuh-marinc 

 -veJeL 



The firft experiment I made, was with about two 

 ounces of gun powder, which I exploded 4 feet under wa- 

 ter, to prove to fome of the firft perfonages in Connecticut, 

 that powder would take fire under water. 



The fecond experiment was made with two pounds of 

 powder, inclofed in a wooden bottle, and fixed under a 

 hogfliead, with a two inch oak plank between the hogfliead 



and 



