[ 2I 3 ] 
in molt {hips is very moift, in ours is quite dry. Our 
cargo arms, which are kept there in upright cherts, 
without wrappers, come out as bright as from a re- 
cent polifh. Far is a ventilator from being inconve- 
nient aboard of us; on the contrary, ’tis good exer- 
cife for our Haves, and a means, of preferving our 
cargo and lives. 
Upon the paftage, I made feveral trials, with the 
bucket fe a -gage, in latitude 2 5' — 13* north; longi- 
tude 2y' — 12'' weft. I charged it, and let it down 
to different depths, from 360 feet to 5346 feet ; when 
I difcovered, by a fmall thermometer of, Fahrenheit’s, 
made by Mr. Bird, which went down in it, that the 
cold increafed regularly, in proportion to the depths, 
till it defcended to 3900 feet : from whence the mer- 
cury in the thermometer came up at 53 degrees; and 
tho’ I afterwards funk it to the depth of 1346 feet, 
that is a mile and 66 feet, it came up no lower. 
The warmth of the water upon the furface, and that 
of the air, was at that time by the thermometer 84 
degrees. I doubt not but that the water w r as a de- 
gree or two colder, when it enter’d the bucket, at 
the greateft depth, but in coming up had acquired 
fome warmth ; for I found, that the water, which 
came up in the bucket, having flood 43 minutes 
in the air (the time of winding it tip) the mercury 
rofe above 5 degrees. When the air had render’d 
it equally warm w r ith the water on the furface, I 
tried their weight, by weighing equal quantities very 
exactly, as alfo by the hydrometer, and found from 
great depths the hcavicft, and conlequently the falteft 
water. 
This 
