Royal Physical Society. 365 



clothing for a grown person, which is so impervious to the 

 cold, that with the addition of a blanket of the same material, 

 any one so clothed may bivouac on the snow with safety, and 

 even with comfort, in the most intense cold of an arctic winter's 

 night." * 



On a close examination of the skin, I have not found any- 

 thing particularly different from the skin of any other animal. 

 The hair is more patent to examination, and is interesting, 

 not only in relation to its own economy, but also in relation 

 to the views held by histologists of the structure of hair in 

 general, and by physiologists of its mode of growth and de- 

 velopment. It has already been made known by Professor 

 Busk, that the hair of the deer tribe is peculiar, being almost 

 entirely cellular ; and the hair has been described and figured 

 by Dr Inman, in an able paper " On the Natural History and 

 Microscopic Character of Hair," published in the " Proceed- 

 ings of the Literary and Philosophical Society of Liverpool," 

 No. 7 (1851 to 1853) ; but as my observation somewhat differs 

 from his, and he has limited his figure to what appears to me 

 an inaccurate representation of the larger hair in one aspect, 

 and has not described the equally interesting finer and smaller 

 hairs, I have thought it desirable to give a careful view 

 of both, with magnified representations of different sections ; 

 and that there may be no exception taken to their accuracy, I 

 have got the drawing made by Dr Greville, whose name is a 

 sufficient guarantee for its fidelity. The subject figured is the 

 skin and hairs of one of the above-mentioned North American 

 rein-deer ; but the structure seems to be the same in all deer — 

 at least it is so in all which I have examined — in the moose 

 in the red-deer, roe-deer, musk-deer, &c, but not in the 

 antelopes. 



The figure on the right hand represents a somewhat magnified 

 portion of the skin, with both kinds of hair issuing from it ; the 

 left hand figure represents a more highly magnified small hair ; 

 the upper centre figure shows a highly magnified portion of the 

 large hair ; the lower centre figure a transverse section of 

 this ; and the middle centre a longitudinal section. 



* Loc. cit., p. 242. 



