VOL. IX.] PHILOSOPHICAL TRANSACTIONS. 151 



Other Observations made by Mr. Leuenhoek, about Sweat, Fatj and Tears. 



N° IJO, p. 128. 



I have often viewed the sweat of men and horses, and found it consisted 

 of a crystalline moisture, in which I saw many transparent globules moving 

 with some odd larger parts, which I judged to be scalings off from the cuti- 

 cula. 



I formerly acquainted you, that I imagined I had seen hair as made up of 

 united globules, and to have also observed elephants' hair consist of the like. 

 I cannot omit now to communicate, that since then I have seen such globules, 

 not only in human hair and horse hair, but also frequently in the wool of 

 sheep; and further, that the root of the hair pulled out of the eye-brows, 

 consists altogether of the like globules. Having pulled out of an elephant's 

 tail a black hair, and cut transversely from it a thin scale, I exposed it to my 

 microscope, which represented in the thick of that hair about a hundred 

 little specks somewhat whitish, and in each speck a black point, and in some 

 few of those black points a little hole; and this hair consisted of united glo- 

 bules, which yet I thought I should have found larger in this thick hair of so 

 bulky a beast than indeed they were. 



I lately viewed some blood in which there was much of the crystalline 

 liquor ; and going into the open air in high wind, I saw to my great delight, 

 continually, and without any other motion but that of the wind, the red glo- 

 bules blown about, and as if each globule had yet a second motion, and that 

 about its axis. 



I have heretofore viewed the fat of sheep and cows, and showed to se'/eral 

 of the curious, that it is made up of globules joined together, which appeared 

 to my eye as large as ordinary hail-stones. And I have lately observed, that 

 each globule of fat consists of more than a thousand small globules. Yet I 

 am apt to believe, that those that have not seen the globules in blood, hair, 

 bone, &c. will not satisfy themselves about seeing them in fat, because of their 

 extraordinary minuteness. 



Having viewed the tears of two infants, I found therein very few round 

 globules, but other odd and misshapen particles of divers forms; some of which 

 seemed to consist of united globules. 



