440 | ADDENDA, 
P. 207.—-Though M. Bonnet is of opinion» 
that the incorporation of foreign particles re-. 
moves the original tranfparence of animals, it is. 
probably owing as much to chemical combina- 
tions. 
Seminal Vermiculi.—It is yet uncertain by, 
whom thefe animals were firft difcovered. ‘Dik. 
ferent authors afcribe the difcovery to various 
naturalifts who lived towards the end of the fe- 
venteenth and in the beginning of the eighteenth 
century. However, it is undoubted, that Leeu- 
wenhoeck was the firlt who inveftigated their 
proper ties. ) 
It was generally believed, that all feminal ver- 
miculi were of the fame fize; that thofe of the 
BOB were as large as the vermiculi of the horfe. 
‘he author has now put it beyond difpute,. that 
there is not only a difference in the fize of thofe 
of different animals, but that all the vermiculi of 
the fame animal are not equally large. | 
Vol. 2. Wheek Animal.—-This animal I have often 
found in fituations without the fmalleft particle of 
fand: indeed, it has repeatedly appeared in dif- 
ferent infufions, and in great numbers. But I 
ag 
