l)cfcriplhn of a neco Diving Machine. 6$ 



If the machine he intended for diving to a great depth, it 

 niuft be conftructed in as ftrong a manner as poffibky and 

 the drawers mult be furnifhed with iron ribs in the infide 

 (aliened by means of hoops to the machine, as may be feen 

 fig. 3 and 6, over which a net of fmall chains or fti 

 cords mufl be hooked or tied to the hoop k, and alfo to the 

 is 2, 2, 2, 2, by means of the holes made in them tW 

 that purpofe; but thefe chains or cords in particular which 

 go behind mud not be drawn too tight, that the diver may 

 be able to bend his body. 



The ribs I, I, are ferewed on the infide to the ftrong iron 

 hoop k, but in fuch a manner as to be moveable ; and as 

 the centres reft on the hips, the diver can move his legs 

 backwards and forwards. To thefe ribs the two hoops 2, 2, 

 are made faft by riveting at 3, 3, and the two interior 

 4, 5 — 4, 5 are feftened in the like manner. To the latter 

 mult be foldered at 5, 5, a circular piece 6, 6, 6, of the like 

 radius as the part c, which, as the diver walks, moves back- 

 ward and forwards on by means of a groove, at the I 

 time that the outer ribs move ; and on account of thefe rib-, 

 hoops, &c. the preffure of the water upward? will prefent 

 the lefs impediment to the diver, as it can act onlv accord- 

 ing to die diameter of the fmalleft hoops 3, 4 — 3, 4. 



The author gives the following inltructions for ufirig a 

 machine of this kind. When the diver, after being made 

 acquainted with all the parts of the machine, has put it on 

 and rafpen'ded from it the proper weights, let him enter the 

 water at any convenient place, and advance till it reaches to 

 his eyes, while the end of the pipe- is held by a perfon on 

 the bank. If the diver can then breathe with cafe, and if 

 no water forces itfelf into the pipe, which muft be left to 

 flo:it on the water, he may proceed till it covers his head, 

 ig firft taken the precaution to tie a ftrong rope to one 

 of his arms. After this he may (lop for fome time, and then 

 gradually go deeper and deeper, making fignals that he finds 

 Uimfclf at eufe, by pulling the rope, or b tig through 



2 the 



