300 SOLID PARTS OF ANIMALS. 



Carbon, . 50-894 

 Hydrogen, . 6781 

 Azote, . 17-225 



civ, 2- 25-100 



Sulphur, * 



100- 



He represents its constitution (abstracting the sulphur) by the 

 formula C 48 H 39 Az 7 O 17 . If we calculate from this formula 

 we get, 



48 carbon, . =36 or per cent. 51-34 



39 hydrogen, 4-875 ... 6-95 



7 azote, . 12-25 ... 17.47 



17 oxygen, . =17- ... 24-24 



70-125 100- 



If from this formula, C 48 H 39 Az 7 O 17 

 we subtract protein, C 48 H 36 Az 6 O 14 



there will remain, . H 3 Az O 3 



which is an atom of ammonia -}- three atoms of oxygen. 



CHAPTER XV. 



OF THE RETE MUCOSUM. 



THIS name has been applied by anatomists to a glairy exuda- 

 tion between the corium and cuticle, adhering to both, but parti- 

 cularly to the former. It is easily demonstrated in negroes ; 

 but much more difficultly in white men. On this account Bichat 

 and some other anatomists have denied its existence altogether. 

 But, on an attentive examination, it can generally be detected. 

 It was Malpighi who first drew the attention of anatomists to 

 this substance. He distinguished it from its appearance by the 

 name of mucous body ; and considered it as composed of soft fi- 

 bres so arranged as to form a net-work. Hence the origin of 

 the term rete mucosum. When a blister has been applied to the 

 skin of a negro, if it be not very stimulating, the cuticle alone 



