IL SEMINAL VERMICUIJ. 205 



The whole length, to the extremity of the appen- 

 dage, is diftindly feen, though deeply immeiied 

 in the feminal matter, which is perfeftly fluid 

 and of a whitifli colour. Here likewife is pro- 

 greffion while the appendage olcillates. This 

 motion is different from that of the human cor- 

 pufcula : it is much more rapid, and fufpended 

 for fhort intervals, which is not to be feen in the 

 others. The fmall quantity of the femen of the 

 bull which 1 had on this occafion prevented me 

 from extending my refearches farther. 



At another time, having abundance, I was 

 -more able to fatisfy my curiofity ( i ). Befides the 

 phenomena before defcribed, I remarked, i. That 

 the corpufcula both fwam horizontally, and rofe 

 and funk in the femen, as fillies do in water ; 2. 

 When the fluid dried, their motio'i was irrecover- 

 ably gone ; 3. In times of equal heat, they mov- 

 ed quicker than thofe of man or the horfe ; 4. 

 The mixture of every kind of water, even of ia.- 

 liva, was fatal to them. Similar phenomena were 

 obferved in the feminal fluid of other three bulls. 

 I had the femen from all thefe at the moment of 

 copulatioa. 



The tefticles of a dog, alive and in .perfefl: 



health, being opened, the epididymis was full of 



■femen, a little vifcous, very thick, and of a dark 



afli colour (2). The thicknefs prevented me 



T 4 f if. Ill 



(i) May 30, die thermometer 6S°. 



(1) February 14, tiie ihermometer at 48°= 



