not able to live any confiderable time tliere j I thought k very well 
worth while, and yet extreamly difficult, to try, whether there might 
not be fome waycsyet unpradlifed,either to make fuch Animals as Na- 
ture endows with Lungs,live without Refpiration, or at leaft to bring 
{uch Infe^is^md other Animals, as can already live without Air,to move 
alfo without it in our F^iCmm, 
, Therefore confidering with my fcif what happens to r^fam and other 
young Animals in the Womb, and even after they come from thence, if 
they continue to be \vrapt up in the Secmdines ^ though as foon as they 
are brought into the free Air they may be prcfently killed by being kepe 
from breatlVmg ; Confidering alfo,whatl elfewhere relate of the flow 
Expiration of a very young KitUngin our Vacmm together with the 
long want of Refpiration, which Cuftorae enables fome to en- 
dure Conlideringthcfe things,! fay though I know, that fomewhat 
may be objededto fliewjthat thcle Inftances are not altogether full to 
ray purpofe ^ yet they, among other things, invited me to think, that 
the leafi- unlikely projeds, that occurr d to ray barren Invention, would 
be thefe that follow. 
Firft, I thought fit to try, Whether the of refpiring Animals 
might be either hatched or other wife brought to produce Young ones 
in our Vncmm. For , if that could be compaifed,! fliouid obtain my 
end. 
Next ^mQ^Xt of ray failing in the former attempt, and that, which is 
to be after a few Lines propofed, I thought fit to try, whether at leaft I 
could not bring the Eggs of Infefts to hatch or be animated ; or ^^r^- 
C as they call them; that were already alive, turn according to the 
courfe of N?ature,intOr^w^i /;«/^^/,a$ Flies or Butter- fiihes.- { of which 
tryals and thofe of the former fort,thc account properly belongs to a- 
nother place, \vhere I relate the fuccefs of thefe and other attempts to 
produce Pian;:s and Animals in our Vacm4m.y 
But tMrdljy GonGdering that Nature has fo ordered it, that Froggf^ 
though when they are grown big enough to defe'rve that name, they be 
amphibious Animals endowed with Lungs yet before they attain to 
that pitchjtiiey live wholy in the water like Fiilie^-,1 thought it the moft 
expeditious and left improbable attempt we could make,tp try,Whether 
or no this Animal,being as a Fiih brought to live either in our V^cmm^ 
or at leaft in highly rarified Air, would not continue to do fo, after its 
Lungs fliould be perfedly formed. Wherefore though I forefaw and 
foretold the difficulty, that would be met with in the profecution of 
this Experiment,nameiy that the Aereal Bubbles,that would be difclofed 
in fuch foft Bodies upon the withdrawing of the prefTure of the ambi- 
ent^woiild fo violate the flight Texture of thofe tender Animals, as to 
kinder them from living long or moving freely yet I thought it very 
fit to attempt the Tryal,whereof I find this account among ray Adver- 
faria. ~' 
