[ 637 ] 
peared? The Element is not unfit for a new Progeny, 
fince other Kinds Succeed in it; nay I can trans- 
port from neighbouring Infufions Some of the fame 
Specific Animalcules into thefe abandon’d Infufions, 
and they will live. Nor yet has the Generation of 
this Species any peculiar Seafon which confines it : 
A A frefh Infufion of the fame animal or vegetable Sub- 
ftance I apply’d before, will give me again in a little 
time the very Kind I am enquiring after, and that 
as often as I think proper to add new Matter. Thus 
might any Naturalift have reafon’d, who had ob- 
served thefe Animalcules with Some Attention ; and 
been gradually conduced to doubt of their fuppofed 
Origin from flying Infers, or Eggs tranfported by 
the Winds. 
§17. But there is yet a feverer Difficulty, that 
Springs from the Consideration of Pafle-Eels : Thefe 
Animals, Mr. James Sherwood and I, by perform- 
ing a kind of cefarean Operation upon them, had 
the Pleafure to obferve were viviparous; and the 
Royal Society , about the latter End of 1745, or 
Beginning of 1746, did us the Honour to give At- 
tention to the Difcovery, when Mr. Sherwood's 
Paper * was read, and the Experiments exhibited at 
one of its Meetings. 1 need not repeat what was 
at that time or has been fince obferved, where the 
Multiplication from one Eel once rofe to 106. 
It is Sufficient to obferve, that thefe Animalcules 
muftrhence consequently be thought to have ar- 
rived at their ultimate State of Perfeftion ; no longer 
liable to change, or to live in any other State; too 
weighty, even the lead of them, to be buoy'd up by or 
transported 
* S ee Phil. Tranf N°. 478, p. 6 7. 
