[ 6s fl ■ 
Notion preconceiv'd of a DiftimSion to be made in 
this Clais of Animals, between thofe that appeared 
under a fenfible Angle in the Microfcope, and the 
atomical ones j but even that Hypothecs alfo which 
I had advanc'd as probable, in the little Effay I pub- 
lifhed in 1745, that lpermatic Animals were no more 
than Multitudes of fuch Machines as thofe of the Ca- 
lamary ; for now it was plain of what kind they were, 
and whence they deriv'd their Origin. 
I 1 - § 22. I fhall not at this prcfcnt time trouble 
you with a Detail of Obfervations upon three or 
four Scores of different lnfufions of animal and 
vegetable Subftances, pofterior to thefe upon Mut- 
ton-Gravy > all which conftantly gave me the fame 
Phenomena with little Variation, and were uniform 
in their general Refult: Thefe may better appear 
at Length upon fome other Occafion ; let it fuffice 
for the prefent to take notice, that the Phials, 
clos'd or not clos’d, the Water previoufly. boil’d or 
not boil’d, the lnfufions permitted to teem, and then 
plac’d upon hot Afhes to deftroy their Productions, 
or proceeding in their Vegetation without Inter- 
million, appear’d to be fo nearly the fame, that, af- 
ter a little time, I negleCted every Precaution of 
this kind, as plainly unneceffary. I take no notice 
yet of their Manner of being generated and gene- 
rating ; in relating thefe Difcoveries, as I believe I 
fhall be more intelligible, if I follow the Order of 
Time : It is a Juftice moreover I owe both to Mr. 
de Buffon and myfelf ; for fome were made by him 
alone, fome by me, and fome of them in Concert 
together : His Syftem, the Detail of his Syftem, his 
Experiments, my own Difcoveries, my Thoughts 
