( 275 ) 



doubtlefs, is what has been taken for the marrow of the hair. All 

 this will be better underftood from the following figures. 



Fig.g, ABCD, is a piece of an hog's briltle, which I cut by a 

 tranfverfe feclion ; EEEE, are the chinks or cracks, arifing from 

 the drying of the hair as above mentioned, and this hair is burft or 

 cracked, in the infide, more than ordinary. Fig. 6, FGHI, is a 

 piece of the fame hair, fomewhat nearer the fkin, alfo cut tranf- 

 verfely, in which, there are not many cracks, or chinks, but only 

 one, which is, however, fo large, as to exhibit the appearance of 

 a hole or cavity in the hair, as appears at KLM, and any one, upon 

 feeing fuch an hair as this, would certainly conclude, that the ca- 

 vity here feen, was not accidental, but the natural form and make,. 

 and confequently, that all hairs are hollow. Fig. 7, NOPO, is an- 

 other piece of an hog's briftle cut tranfverfely, from which I fuppofe 

 the moifture had evaporated lb flowly , as not to leave the leaft appear- 

 ance of a chink or crack : Jig. 8, is a perfe6tly black hog's brillle cut 

 tranfverfely, and, as it exhibited a pretty appearance, I have given 

 a drawing of it. And, though the roughnefs, which is on the eds^e 

 of the iharpeft razor, frequently leaves fcratches on the face of the 

 hairs thus cut tranfverfely, I almoft wholly avoided that appearance, 

 for which reafon, I was better able to point out the flreaks or fibres 

 of which the hairs confift. 



From the preceding figures, it will appear, how much thofe are 

 mifiaken, who will have it, that all hairs are round, whereas we ought 

 rather to fay, that every hair has a figure peculiar to itfelf. 



It is my opinion, that the hairs on man's body, do, at certain fea- 

 Ibns, fall off, and are again renew^ed, like the feathers on birds ; at 

 leaft, I have experienced this to be the cafe with myfelf every fpring, 

 (excepting the hairs on my head and beard) and I have obferved, 

 that thofe hairs which feemed ready to fall off, coujd be pulled out 

 with a fmall pair of pincerS;, and not caufe that pain which attends 



