time of its total immerfion being markM i At the end of half a minute 
after that time the ftruglings of the Bird fccming finifk'd, he was 
nimbly drawn up again, but found quite dead. 
Experiment the 2. 
Whereupon a that was very liifty. and quarrelfome , was 
(y*d to the fame weight , and let down after the fame manner -, but 
though he feem'd to be under water more vigorous than the other Bird, 
and continued ftrugling|lmoft to the very eml of half a minute from 
th£ time of his being totiliy immcrsM ( during which ftay under water 
there afcended/rom time, to time, pretty large bubbles from his mouth,) 
yet notwithftanding, that as foon as ever the balf n^iaute was complea- 
ted, he was drawn up, we found hirs,to our wonder, irreeoverably gone« 
Experiment the 3. 
A fmaU Mmfe^ being held under wafer by the tail,€mitted from time 
to time divers Aerial Bubbles out of his mouth y and at laft , as one of 
the Speda tors affirm'd, he faw at one of his Eyes, being taken out at the 
end of half a minute andfomefew feconds , he yet retainM fome moti- 
ons but they proved but Convulfive ones , which at laft ended in 
Death. 
Byivh^ u related under the I. Title, it dees mt appear ^ that WMr» 
*Fowi , at leaft that Ducks could in our Receivers endnre the "want of Air 
much longer than other Birds : But novo to. fhev? , that the C<^mrivance of Na- 
ture is not in fgnificmty as to the enabling them to continue much longer unde^^ 
Water ^ icvithout frefh Air^ than the Land- birds ahovementiond , it will m hs 
Amifs, to fubjoyn the two following Experiments, 
Experiment the 4th • 
We took the D/^ci^mentionM in the /. Title , and fo tyM a confidera- 
ble weight of Lead to her body, as it did not hinder her Refpiration , 
and yet would be fure to keep her down under water ^ which we had 
found that a fmall weight would not do by reafon of her ftrength , nor 
yet a great weight, if ty'd only to her feet, in fuch a middle- lizM Tub 
as ours was , becaufe of the height of her neck and beak. With the 
above- mentioned Clog , the Duck was put into a Tub full of clear wa- 
ter, under whofe Surface (lie continued, about a minute by my Watch, 
quietly enough, but afterwards began to appear for a while much di- 
ilurbM i which fit being over , our not perceiving any motion in her 
made us, at the end of the fecond minute, take her out of the water, to 
fee in what condition [he was , and finding her in a good one , after 
we had allowed her fome breathing time to recruit her fclf with frefli 
U 2 Air» 
