SUPPLEMENT. 1215 



Making due allowance for size, there is a somewhat 

 greater difference in the proportion of solid material 

 between oysters and fish than between oysters and birds 



and mammals, for 



Per cent, of 

 solid material. 



Trout-flesh contains ............ 19*5 



Carp flesh contains , ........... 20*2 



Pork contains ............... 21*7 



Veal contains ............... 21*8 



Beef contains ...... .......... 22-5 



Fowl-flesh contains 



One hundred parts of dried oyster-meat contain 7*69 

 to 7*81 parts of nitrogen, and 100 parts of fresh oyster- 

 meat contain i '85 to 1*87 parts of nitrogen. By burning 

 the dried oyster-meat we can obtain the amount of inor- 

 ganic material which it contains. By this method it has 

 been found that the meat of completely dried Schleswig- 

 Holstein oysters, when deprived of the beard, contains 

 7 '45 per cent, of inorganic substances, while in those 

 which have not been dried the amount is only 1*79 per 

 cent. According to these determinations, 100 parts of the 

 bodies of fresh edible Schleswig-Holstein oysters contain 



77*00 parts of water. 



2 1 '2 1 parts of organic material. 

 i '79 parts of inorganic material. 



The principal inorganic substances are salt (sodic 

 chloride) and phosphoric acid. The proportion of salt in 

 fresh oysters is 0*58 per cent., and of phosphoric acid 0*38 



(d] The figures quoted in the comparison of the amounts of solid 

 materials in different kinds of flesh are based upon the analyses of 

 Schlossberger and Von Bibra. They were taken from the Elements of 

 Physiological Chemistry of Gorup-Besanez, third edition, 1874, P* 



