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Light from above ; and likewife a Cock to let out the 
hot Air that had been Breathed ; and below, about a 
Yard under the Bell, I placed a Stage which hung by 
three Ropes, each of which was charged with about one 
Hundred Weight, to keep it fleddy. This Machine I 
fufpended from the Mail: of a Ship, by a Spritt which 
was fufficiently fecured by Stays to the Maft-head, and 
was directed by Braces to carry it over-board clear of the 
Ship fide, and to bring it again within board as occafion 
required. 
To fupply Air to this Bell when under Water, I caufed 
a couple of Barrels, of about 3 6 Gallons each, to be 
caled with Lead, fb as to fink empty 3 each having a 
Bung-hole in its lowed Part to let in the Water, as the 
Air in them condenfed on their defeent; and to let it out 
again, when they were drawn up full from below. And 
to a Hole in the uppermofl Part of thefe Barrels I fixed 
a Leathern Trunk or Hofe, well liquored with Bees-Wax 
and Oyl, and long enough to fall below the Bung-hole, 
being kept down by a Weight appended ; fo that the Air 
in the upper Part of the Barrels could not efcape, unlefs 
the lower ends of thefe Hofe were firfl lifted up. 
The Air-Barrels being thus prepared, I fitted them 
with Tackle proper to make them rife and fall alternate* 
ly, after the manner of two Buckets in a Well ; which 
was done with fo much eafe, that two Men, with lefs 
than half their Strength, could perform all the Labour 
required : and in their defeent they were dire&ed by Lines 
faftned to the under edge of the Bell, the which pad 
through Rings placed on both fides the Leathern Hofe in 
each Barrel ; fo that Aiding down by thofe Lines, they 
came readily to the Hand of a Man, who flood on the 
Stage on purpofe to receive them, and to take up the 
ends of the Hofe into the Bell. Through thefe Hofe, as 
foon as their ends came above the Surface of the Water in 
the 
