( «7p ) 
Coiles of his Pipe, which ferve as a Clue to direft 
him back again : and this I have feen praftifed, with- 
out any ill Incident attending it. 
aff? wiVf tW ,° t0 be remark’d in this 
a ir , tirft, That the Weight of a Man being very 
little more than that of his Bulk in Water, he can- 
not aft with any Strength, nor ftand with any 
r trinity efpecially where any thing of a Stream 
runs, without a confiderabie addition of Weight * 
and therefore the leaden Caps were made to weigh 
about half a hundred weight, to which I added a 
Girdle of large YV eights of Leads, of about the fame 
^ight in the whole, this being to be worn about 
the aft j and two Clogs of Lead for the Feet of 
about 12 pound each. With this Acccfhon of Weight 
I found a Man could ftand well in an ordinary 
Stream, and even go againft it. The other thing 
neceffary to be provided againfl, was the Cold of the 
Water, which though it could not be wholly taken 
ofF, fo that a hdan could endure it long, yet it was 
much eafed by Habits of Waftecoat and Drawers 
made clofe to the Body, of that thick fort of woollen 
Stuff they make Blankets of : This being full of Wa- 
ter 5 would be a little warm d by the Heat of the Bo- 
dy, and keep off the Chill of new cold W ater coming 
on it. 5 
As to Sight under Water, as long as the Water is 
not turbid, things are feen fufficiently diftintf ^ but 
a fmall degree of Thicknefs makes perfed Night, in 
no great depth of Water: In my leaden Caps, which 
from their ufe I call’d Caps of Maintenance , I at fir If 
fixt a plain Glafs before the Sight, but foon found 
that the Vapour of the Breath would make fuch a 
Dew on the Surface of the Glafs, that it hindred 
Cc 2 its 
