SUB-MARINE VESSEL. 307 



a lathe to fit them ; the joints were alfo kept full of oil, to 

 prevent ruft and leaking. Particular attention was given to 

 bring every part, necefl'ary for performing the operations, 

 both within and without the veflel, before the operator, 

 and as conveniently as could be devifed ; fo that every thing 

 might be found in the dark, except the water-gauge and 

 the compafs, which were vifible by the light of the phof- 

 phorus, and nothing required the operator to turn to the 

 right hand, or to the left, to perform any thing neceffary. 



No. 2. 



Defcription of a magazine and its appendages, dcjigned to be 

 conveyed by tbej'ub-marine vejfel to the bottom of ajhip. 



In the forepart of the brim of the crown of the fub-ma- 

 rine vefTel, was a focket, and an iron tube, paffing through 

 the focket ; the tube flood upright, and could flide up and 

 down in the focket, fix inches: at the top of the tube, was 

 a wood-fcrew fA) fixed by means of a rod, which pafTed 

 through the tube, and fcrewed the wood-fcrew fail upon 

 the top of the tube: by pufliing the wood-fcrew up againft 

 the bottom of a fliip, and turning it at the fame time, it 

 would enter the planks ; driving would alfo anfwer the 

 fame purpofe ; when the wood-fcrew was firmly fixed, it 

 could be cafl off by unfcrewing the rod, which faftened it 

 upon the top of the tube. 



Behind the fub- marine veffel, was a place, above the 

 rudder, for carrying a large powder magazine, this was 

 made of two pieces of oak timber, large enough when hol- 

 lowed out to contain one hundred and fifty pounds of pow- 

 der, with the apparatus ufed in firing it, and was fecured 

 in its place by a fcrew, turned by the operator. A fi;rong 

 piece of rope extended from the magazine to the wood- 

 fcrew (A) above mentioned, and was faftened to both. 



S f 2 When 



