6$ DISEASES Class I. 2. 3. irj 



in contact with the fore part of the neck and breaft ; the tail is 

 applied clofe againft the divifionof the thighs behind ; the infide 

 of the hinder thighs are preffed clofe to the fides of the belly, all 

 thefe parts have white hairs. 



The fore-legs in the uterus lie on each fide of the face ; fo 

 that the feet cover part of the temples, and comprefs the prom- 

 inent part of the upper eye-brows, but are fo placed as to defend 

 the eye-balls from prerTure ; it is curious to obferve, that the 

 hair of the fides of the face, and of the prominent upper eye- 

 brows, are tawny, and of the infide of the feet and. legs, which 

 covered them ; for as this pofture admitted of more change in the 

 latter weeks of geftation, the colour of thefe parts is not fo far 

 removed from black, as of thofe parts, where the contact or 

 compreiTion was more uniform. 



I have lately alfo infpecled a male cat ; who is quite black all 

 over, except thofe parts which appear to have been folded together 

 in the uterus ; all which are perfectly white. In both thefe ani- 

 mals the parts comprefled together are fo diftinftly defined by 

 their colour, that the difference of the curvature and fituation 

 of them in the uterus may be nicely difcerned : the hinder feet 

 of the cat lay in the arm-pits of the fore-legs, and are white ; 

 her fore-legs crofTed over the hinder thighs, and left on them a 

 white mark j but the fore-feet, at leaft the hind part of them, 

 lay under the tail ; whence the fore-feet are tipped with white. 

 Where the foetus is lefs tender, I fuppofe, this comprefTion in 

 the uterus does not affect it •, as dogs and cats are perpetually 

 feen, which are totally black. 



Where this uterine comprefTion of parts has not been fo great 

 as to render the hair white in other animals, it frequently hap- 

 pens, that the extremities of the body are white, as the feet, 

 and nofe, and tips of the ears of dogs and cats and horfes, where 

 the circulation is naturally weaker ; whence it would feem, that 

 the capillary glands, which form the hair, are impeded in the 

 firfl infiance by compreffion, and in the lafb by the debility of 

 the circulation in them. See Clafs I. 1.2. 15. 



This day, Auguft 8th, 1 794, I have feen a negro, who was 

 born (as he reports) of black parents, both father and mother, at 

 Kmgfton in Jamaica, who has many large white blotches on the 

 fcin of his limbs and body ; which I thought felt not fo foft to 

 the finger, as the black parts. He has a white divergent blaze 

 from the fummit of his nofe to the vertex of his head ; the up- 

 per part of which, where it extends on the hairy fcalp, has thick 

 curled hair, like the other part of his head, but quite white. By 

 thefe marks I fuppofed him to be the fame black, who is defcri- 

 bed, when only two years old, in the Tranfaftions of the Ameri- 

 ca 



