Diving MacMne. i*£ 



tt Two fmall oars may be added to the flep or feat in or- 

 Jer to make a few movements, and alfo an anchor or grap- 

 nel to fatten the machine to the bottom, that the diver may- 

 be enabled to walk about with the pipe at freedom, for the 

 purpofe of examining funk bodies, and difcovering the pro- 

 pereft method of railing them. For the greater fecurity, in. 

 cafe any accident mould happen to the machine, an appa- 

 ratus may be applied to the pipe, that the diver can leave the 

 machine and rife without it ; which he might eafily effect, 

 by throwing away the weights fufpended from his hamefs, 

 and by retaining between his body and harnefs a fufficiency 

 -of air for afcending. By thefe means he might leave the 

 great machine, even if he were not acquainted with fwim- 

 ming. As foon as be rofe to the furface, he would obtains 

 frefli vital air through the opening^. (See Plate I. of the 

 preceding Niu m ber.) 



" At p is a lantern, the ufe of which is to afford the diver 

 light in the water ; becaufe the folar light is prevented from 

 penetrating to very, great depths by the many foreign fmall 

 particles mixed with that fluid, and is therefore incapable of 

 rendering bodies King at the bottom of it vifible ; and be- 

 caufe occasions may occur when artificial light will be ne- 

 eeflary. 



" I have alio prepared fuch lanterns to be held in the 

 hand ; but, for particular reafons, I muft here abftain from, 

 explaining their continuation, and only affurc the public, on 

 my veracity as an honed man, thatthey anfwer the intended 

 purpofe. A candle in thefe machines, which are very Am- 

 ple, will burn in every kind of air, in mines and pits, where 

 all other lights arc extinguifiicd. They contain a fpace 

 equal to a cubic foot; and the candle burns, without any 

 new addition from without, for t.vo or three hours : thev en- 

 dure all concufiions of the air, and are deranged by no mo- 

 tion or working in minis. Their utility, therefore, in other. 

 may readily be conceived. 1 mail not fail, however, 

 at another time, to make them publicly known, as well a& 

 all the previous circurnftances which led me to the difeovery. 

 6 XII. >"..- 



