O F A N I M A L S, ss 



lories. The chyle, which is a purer part of 

 the aliment, is abJbrbed by the lad:eal veffels ; 

 from thence it is carried into the mafs of blood, 

 and, in the courfe of circulation, it is more and 

 more refined, the unorganic and ufclefs particles 

 being thrown out by tranlpiraiion and other fe- 

 cretions : But the organic particles are retained, 

 becaufe thev are analogous to the blood, and are 

 attracted by it. Hence, as the whole mafs of 

 blood pafl'es feveral times through the body, 

 during the courfe of this perpetual circula- 

 tion, I fuppofe, that each particular part attracts 

 thofe particles which are moft analogous to it, 

 and allows the reft to move on. In this manner 

 all the parts are nouriflied and unfolded, not, as 

 is commonly imagined, by a fimple addition of 

 matter to their furfaces, but by an intimat; pe- 

 netration of (ubftance, effeded by a force which 

 ads equally upon every point of the whole mafs : 

 And, after the different parts have acquired their 

 utmoft growth, and are fully impregnated 

 with fimilar organic particles, as their fubftance 

 becomes then more denfe and folid^ 1 imagine 

 that they lofe their faculty of attrading and re- 

 ceiving the particles prcfented to them. But, as 

 the particles continue to be carried round in the 

 courfe of the circulation, and are no longer ab- 

 ibrbed in fuch quantities as formerly, they muft, 

 of neccfTity, be depofitcd in fome particular re- 

 fervoir, fuch as the tcfticles and feminal vefTels. 

 When this iluid extract of the malq is ipixed 



■witji 



