Dtfcrlption of a hew Diving Machine. 6l 



into which the mouth-piece of the breathing pipe is fcrewed; 

 and g is an aperture for looking through, as well as for the 

 purpofe of breathing when out of the water, and which, by 

 means of the cover h fufpended from it, can be fcrewed up 

 before the diver enters the water. 



Fig. 3 represents the under part of the cylinder, which is 

 alfo 15 inches in height, and which at i and k is itrengthened 

 by iron hoops on the infide, in the fame manner as the 

 former. To the lower hoop k are foldered four fmall rings, 

 to which are fattened ftrong leather ftraps, three inches in 

 breadth, that can be buckled crofs-wife over the moulders, 

 and fupport the whole machine; // are the under halves of 

 the apertures for the arms ; m is alio a ring of brafs wire 

 foldered to the cylinder, which ferves to keep faft the jacket 

 when buckled on, and to fupport the upper cylinder (Jig. 2) 

 which flips over the under one, and on that account the 

 under one is a little fmaller fo as to fit into the upper one. 

 There is alfo another fuch ring at n, in order to prevent the 

 drawers from falling down. 



At (Jig. 2, and Jig. 6) is a ftrong femicircular piece of 

 iron, the ufe of which is to prevent the drawers, when prefled 

 by the water, from touching the under part of the body, 

 othcrwife the prefiure, even at the depth of fix feet, would 

 be infupportable. As it is not poffible to few the leather 

 fo clofely as to prevent water from forcing its way through 

 the feams, a fmall pump is fufpended at p, for the purpofe 

 of pumping out the water when it has rifen to the height or 

 a few inches in the lower cylinder. Four hooks q q q q 

 foldered to the lower part of the cylinder are for the purpofe 

 of fufpending weights from them. 



The jacket r (Jig. 1) with fhort fleeves that cover the 

 upper part of the arms, ferves to prevent the water from 

 penetrating through the joining of the cylinders, where the 

 one is inferted into the other, as alfo through the holes for 

 the arms, as it is bound fad round both parts of the cylindei 



and 



