6o Dcfcrlptlon of a new Diving Machine. 



his machine in the river Oder, in the prefence of a great 



'many fpectators, exceeded what couid have been expected. 



It is well known, that the prefTure of water increafes with 

 its depth ; and as water is a denfe body, a man cannot defcead 

 fer in it without experiencing a very ftrong preiTure : fo that 

 if a diver, whofe head is five feet below the furface, attempts 

 to breathe through a pipe, he finds himfelf incapable of in- 

 haling the air, on account of the preffurc he fuftains on his 

 bread. A man, therefore, to defcend to a great depth, muft 

 have his body and breaft free from the external preflure of 

 the fluid. In order to fecure him from this inconvenience, 

 the author has invented a fort of harnefs, made of ftrong 

 tin plate, in the form of a cylinder, which goes over the 

 diver's head, and which confifts of two parts, that he may 

 conveniently thruft his arms through it and put it on; alio 

 a jacket with fhort fleeves, and drawers of ftrong leather. 

 All thefe being water-tight, and clofely joined round the 

 body of the diver, fecure every part of him but the arms and 

 legs from the preflure of the water, which at the depth of 

 20 feet will occafion no inconvenience to thefe parts. 



Fig. 1 (Plate 1) reprefents the diver covered with the 

 harnefs, jacket and drawers. 



Fig. 2 is the upper part of the cylinder, the diameter of 

 which is equal to the breadth of a man at the top of the hip- 

 bone. It is 15 inches in height, has a globular top, and is 

 made of the ftrongeft tin-plate. 



In the infide of (die cylinder, at a, is a ftrong broad iron 

 hoop, to enable it to withftand better the prefTure of the 

 water ; and in the infide of the top there are two pieces of 

 a ftrong hoop of the fame kind, placed over each other in 

 the form of a crofs at b. A ftrong ring of brafs wire is 

 foldered upon the outride at c, that the jacket may be 

 fattened to it with an elaftic bandage to prevent it from 

 flipping downwards. At d d are the upper halves of the 

 apertures for the arms; and ee are holes to afford light, 

 and into which the eye glafles are fcrewed ; /is the opening 



