

333 



Of Vegetation. 



ture makes a wonderful provifion for this 

 at the glutinous ferrated joyning of the heads 

 to the (hanks of the bones i which joyning 

 while it continues ductile the animal grows, 

 but when it oflifies then the animal can no 

 longer grow. As I was auured by the following 

 Experiment, viz. I took a half grown Chick, 

 whofe leg-bone was then two inches long, 

 and with a (harp pointed Iron at half an inch 

 diftance I pierced two fmall holes through the 

 middle of the fcaly covering of the leg, and 

 shin-bone ; two months after I killed the 

 Chick, and upon laying the bone bare, I 

 found on it obfcure remains of the two 

 marks I had made at the fame diftance of 

 half an inch: So that that part of the bone 

 had not at all diftended lengthwife, fines 

 the time that I marked it : Notwithstanding 

 the bone was in that time grown an inch 

 more in length, which growth was moftly 

 at the upper end of the bone, where a won- 

 derful provifion is made for its growth at the 

 joyning of its head to the (hank, called by 



Anatomifts Symphysis. 



And as the bones grow in length and fize; 

 fo muft the membranous, the raufclar, the 



^ nervous, 



i * 



