II. AnUxtraB of a Letter from Mr. hQewcnho^k^ 
Dated the lOth of Juty^ An, 16^6. Con- 
taining Microfcopical Obfera/ations on Ee/s^ 
MifeSy the Seeds of FigSy Strawberries^ 8cc. 
IMuft tell you. Gentlemen, that when I had written 
of the Engendring of Eels, and did fend the 
Print thereof to Mn Chr. Huygem of Zuylighem, he 
did Anfwcr me from his Country -houfe, called Hofwyk, 
on the 20th of OHoher, 1691. to this purpofe; 
I have been hindered by divers Bufinefles and Acci- 
dents, from reading your laft Communicated Obferva* 
tions, until now; I have found in them great Satisfaftion 
and Pleafure, ^c. 
I am very much pleafed, that the longer the plainer 
you prove the Generation of Animals by Seed and not 
Corruption, and I am alfo of the fame Opinion. 
Concerning the Generation of Eels, It feems to me 
very ftrange, that their young ones are found by you 
in the Womb, without any Sign of Life ; neither do 
you make any mention of Mate kind of Fiflies, which 
perhaps, may by Microfcopes be found to be Living 
Seed, but we fliould be long to ask you every particu- 
lar, there being ftiil left innumerable Difcoveries behind. 
We ought highly to commend and admire your La- 
bour and Diligence in thefe you Communicate, where- 
by natural Knowledge is daily augmented and mended, 
fo do I among the reft remain 
TmrSfdcc. 
It was Signed Chr.Huygens. 
Ss 
And 
