OFANIMALS. 51 



of nourlfhment : The voice changes into a 

 deeper tone ; the beard begins to a^-j^ear, and 

 other parts of the body are covered with hair; 

 the parts deftined for generation are fuddenly 

 expanded ; the feminal fluid fills the relervoirs 

 prepared for its reception, and fpontaneouf- 

 ly efcapes from the body during fleep. This 

 fuperabundance is ftill more evident in the 

 female: It dilcovers itlelf by a periodic evacua- 

 tion, which begins and terminates with the fa- 

 culty of propagating i by a quick iLcreai'e of the 

 brealts ; and by a change in the fexual parts, 

 which ihall be afterwards explained *. 



I conceive, then, that the organic particles 

 fent from all parts of the body into the tellicles 

 and leminal vellels of the male, and into the 

 ovarium of the female, compoie the ieminal 

 fluid which, in either fex, as formerly obierved, 

 is a kind of extract from the feveral parts of the 

 body. Thefe organic panicles, inft< ad of uni- 

 ting and forming an individual fimilar to that. in 

 whofe body they are contained, as happens in 

 vegetables, and Tome imperfed animals, cannot 

 accomplifh this end v.-ithoiit a mixture of the 

 fluids of both iexes. When this mixture is made, 

 if the organic particles of the male exceeJ thofe 

 of the female, the refult is a male; and if thofe 

 of the female abound mod:, a female is gene- 

 rated. I mean not that the organic particles of 

 the male or of the female could fmgly produce 



D^ 2 individuals : 



• See below the Nat. Illll, of Man, chap. 2. 



