293 SEMINAL VERMICDLI. U^ 



fo great as that of the human corpufcula, which 

 may be the reafon why they advance further in 

 fhe fame time : their progrefTive motion is quick- 

 er, and fometimes- faltatory. The fize of all is 

 not the fame, nor do the whole die in the fame 

 time. A few have continued moving more than 

 an hour y the greater part died in three quarters ^ 

 and fometimes, but feldom, they did not live- 

 above half an hour. When motion ceafes, they 

 remain entire, with the appendage extended in a 

 ftraight line, or a Httle curved. 



The femen of the horfe is very glutinous and 

 filamentous (i). There we fee the corpufcula at- 

 tached by the body, and particulai'ly by the fila- 

 ment, to various irregular fubftances mixed with 

 ihe fluid ; and, unable to difengage themfelves, 

 the fubftances are fenfibly agitated by their 

 motion. Thus it is that in feveral places 

 corpufcula are feen attached together, which 

 might induce us to think them larger than the 

 reft: but, with attention, the two feparate ap- 

 pendages are foon perceived, each ofcillating by 

 itfelf ; and if the obfervation is prolonged, it is 

 not uncommon to fee the bodies divide and form 

 two diftinS: corpufcula. 1 am well aifured it is 

 not an optical illufion, regarding the corpufcula 

 of a different fize, but a pofitive fad. Some 

 were a third larger than the reft ; which diverfity 



was. 



(j) 22 March, the tliernTometer §7°- 



