(474 ) 
A D/fcourfe concerning the Modern Theory ^/Generation, 
by Dr. George Garden of Aberdeen, being part of * 
Letter to Dr. William Mufgrave, L L. D. Reg. Soc. S. 
and by him communicated to the Royal Society. 
TH E Subjeft I pitch upon, is that of the formation 
of Animals. You know how wide and unfatisfying 
Mens Conje&ures were upon this Head until this Age, 
in which firft the defervedly Famons Dr. Harvey difco- 
vered the proper place of the formation of the Chick 
in the Cicatricula of the Egg, and the formation of the 
Parts fo far as was difcemable by the naked Eye 5 and 
after him Malpighius by the help of exadt Glaffes, ob- 
ferved the firft Rudiments of it there, both before and 
after Incubation: And R, de Qratf and others, having 
upon many Obfervations concluded that the Tefte s F&- 
minei were the Ovaries of Females, and confequently 
that all Animals were ex ovo , they began from hencet 
to infer, that the Rudiments of each Animal were ori- 
ginally in the refpe&ive Females, anci that the M^le con- 
tributed only to give a new Ferment to the Mafs of the 
Blood and Spirits, by which means a fpirituous Liquor 
( which the Blood in its ordinary Ferment could not 
produce ) did infinuate its felf into the fame Du&s and 
Pores of the Rudiments of thofe Animals which were 
in greateft forwardnefs in the Ovary, and fb extend, and 
enlarge all their Parts, and at laft bring them to per- 
iefiion, as Mr. Perrault does ingenioufly difcourfe in the 
third Part of his EJJais de Phyfique; till now at laft 
Leewenhoeck has difcovered an infinite number of Ani~ 
tnalculain femine mar turn of all Kinds, which ha? made 
him condemn the former Opinions about the propaga- 
tion of all Animals ex Ovo. 
Now upon comparing the Obfervations and Difco- 
veries which have been taade with one another ? thefe 
three 
