OF THE FOETUS. 275 



of the animal, will arrange themfelves in a fi- 

 milar order in the head of the foetus. Thofe 

 which proceeded from the back bone, will dilpofe 

 themfelves in an order correfponding to the 

 ftrudure and pofition of the vertebrae. In the 

 fame manner, the organic particles which had 

 been detached from any part of the body, will 

 naturally alTume the fame pofition, and arrange 

 themfelves in the fame order that they obferved 

 before they were feparated from that part. Of 

 courfe, thefe particles will neceifarily form a 

 fmall organized body, entirely fimilar to the ani- 

 mal from which they originally proceeded. 



It is worthy of remark, that this mixture of 

 the organic particles of both fexes contains par- 

 ticles which are fimilar, and particles which are 

 diffimilar. The fimilar particles are thofe which 

 have been detached from all the parts that are 

 common to the two fexes. The diffimilar particles 

 are thofe which have been feparated from the parts 

 that diftinguifh the two fexes. In this mixture, 

 therefore, there is a double portion of particles de- 

 ftinedforthe formation of the head, the heart, and 

 fuch parts as are common to both fexes; while 

 there are no more than what are neceffary for the 

 produaion of the fexual parts. Now, the fimilar 

 particles may ad upon each other without pro- 

 ducing any diforder ; and they may unite in th? 

 fame manner as if they had proceeded from the 

 fame body. But the diffimilar parts cannot ad 

 upon each other, nor form any intimate union, 

 becaufc they have no analogy or relation : Hence 



S 2 thcfe 



