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llie upper end. Many other Scales were not fo long as this, nor 

 their lides lb Imooth, and thele 1 judged I had pulled or broken 

 off the Ikin before they had come to their perfc6l fize and growth. 

 Thefe Scales are wonderfully thin, for I judged them to be 

 twenty-five times broader than thick ; and I alfo perceived, that 

 they were placed in triple rows on each other ; or, in other words, 

 that our Ikin is covered with three layers of them, for only one 

 third part of each Scale is vifible to the eye, and under it are, at 

 leali, two other Scales, which are covered by it, as appears at 

 fig, 11, M, the part of which marked 1, 2, 3, 4, is only vifible, the 

 remainder being covered by other Scales. That part of the Scale 

 marked 3, I feldom perceived lb lliarp pointed as here pidlured; 

 but as I confidered this to be one of the moft perfc<^ly formed 

 Scales I had met with, I copied its figure in the drawing. In 

 filhes we alio fee, that while their Scales arc fixed to their bodies, 

 only a part of them is vifible to us. But whereas, fithcs never call 

 their Scales, at leaft as I could ever obferve, this is not the cale 

 with our bodies, for I myfelf have ieen on my own body a thou- 

 fand Scales and vipwards feparated from the Ikin and adhering to- 

 gether; but when I pulled off any Scales flicking to my Ikin, and 

 which I conceived were newly formed, either an elRjlion of blood 

 followed, or a red fpot appeared. I alfo took fome Scales from the 

 fkin of my arm, in a place where a fear had been left on my being 

 let blood about twenty-five years ago, and I law many of them 

 lliaped as at j%, lo, L. 



I obferved on many of thefe Scales certain tranfparent irregular 

 llreaks, which 1 have reprefented in^^. li, M, and thefe covered here 

 and there with round globules about a fixth part the fize of a glo- 

 bule of blood, and thefe are alio reprefented in the figure ; and 

 thefe, I fuppofed to be occafioned by exfudations from the body left 

 upon the Scales. From this conftrudlion of our external Ikin, I 

 think, we may conclude that fleas, lice, and othei- infeds, do not 



