Exferiment !• 
We took a good Company of Tadpoles ^md put them with a conveni- 
cnt quantity of water into a Portable Receiver of a round figure, and 
obfervedjthat at the firft cxudion of th« Air they did rife to the top of 
the water, though moft: of them fubfided again, till the next cxu(^ioti 
raifed them. They feemcd by their adive and wrigling motion to be very 
difcompofed.The Receiver being cxhaufted,they continued reftlefs mo- 
. ving all of them in the top of the water, and though fomc of them fecraei 
to endeavour to go to the bottom, and dived feme part of the way, cfpe- 
cially with their heads, yet they were immediately boyed up again. With- 
in an hour or a little more they were all movelels, and lay floating on 
the water ^ wherefore I opened the'ReceiYer,upoh whicbtbe Air rufhed 
in, and almoft all of them ("which were many) prclently funk to the bot- 
tom, but none of them recovc'fied to life:'- . y'' 
h littlc after thefe,we included a leffer' number of T'W/jo/^/ in a ^maU 
ler Glafs, which was alCo exhaufted with the like circumftances with the 
former. And when I found the other Tadpoles to be dead ;1 hafkd to thefe, 
which did not,except perhaps one, give any lign of Life , but upon let- 
ting in the Air, thefe having no't beerl long kept from it, fome few of 
them did recover, arid fWam up and dowri^ tiv.eiy enough for fonic time-, 
though after a wbil^ they alfo dyed. i/^ar ii , . wta \ irj ■ * 
Experiment 3. . 
Some years after I repeated the fame Experiment in a portable Recei- - 
ver of a convenient kind, arrd though after theExhauftion was perfedecT , 
the Tadpoles did for a while move briskly enough on the tfop o'f i^he wa- 
ter (none of them appearing able to dive or fwim under water J yet 
coming to lookon them at the end of an hour, thVy.feem^d to be all of 
them quite dead, yet continued floating. And though- within half afJ hour 
after that,! let in the Air upon them, yet all the effed of it^was, th t the 
moft of them immediately funk to the bottom, as thereil -of them did a 
very little while after ^ none of thcra;that Ixould obfervcV^ecovering 
any vital motion. ---^^ '^^^t.-n^^/o f:7/.n^ vif—ii: nsdw Jcj,; 
'.' Expenmeftt -4^ - '^'^^^' ■ / 'iidv - 
There remains an Experimenr, which I oft'^il jiidged ^5" well more 
hopeful! as more noble, if I could procure an opportunity to bring my 
deOgn to a tryal, which 1 have found it very difficult to do • neverthe- 
lefs I was able to doit once,th0U'gh not fully as J defired , yet notalto^^ 
gether without iliccefs. , 'vm*{^>l vlii;t;ii3C jjaK iH 
We procured then,andwith muchadoeVfome of thofe 6ddInTe(^s;which- 
1 elfewhere cfefcribe, whereof G^i^us have by fome ingenious men been 
obferved to be generated about the end of JugfiB ^or beginning of Sep- 
temher. Thefe for fome weeks live all together in the water ; as Tadpoles 
do ; fwimming up and down therein, till they are ripe for a transmigra- 
tion into-Pyes : which it felf is fo great a Rarity in Nature, as makes 
thefe little Creatures recorapcnce to our Curiofity the troublCjthcy of. 
ten 
