354 Messrs. Schlossberger and Kemp o)i the Proportion of 



Intermediate between animal and vegetable aliment, as daily 

 observation teaches and chemical analysis confirms, is to be 

 found the most general food of the young of the class Mam- 

 malia, namely, milk. 



I. Cow's milk. O'^O* gramme* of the dried residue, ob- 

 tained by evaporating the fresh-drawn milk in the water-bath 

 and subsequent desiccation at 212° F., yielded 0'241 grm. of 

 the ammonio-chloride of platinum, corresponding to 3'78 per 

 cent, of nitrogen. 



II. O'^SS grm. human milk, ti'eated as in the first experi- 

 ment, gave O'll grm. ammonio-chloride of platinum, equal to 

 1*59 per cent, of nitrogen. 



Human milk is, according to most analyses, one of the 

 poorest in caseine, and in this respect is very far inferior to 

 that of the cow, but in consequence of this may probably be 

 more easily digested. The amount of nitrogen in milk, which 

 corresponds to that of caseine, comes much nearer to the pro- 

 portion contained in vegetables than any other kind of aliment 

 from the animal kingdom. 



Of the substances obtained from milk and used as food, we 

 have examined only that of cheese, selecting four of the kinds 

 most commonly used in Britain. 



III. 0'485 grm. of Dunlop cheese gave 0*4;61 grm. of am- 

 monio-chloride of platinum, equal to 6*03 per cent, of nitro- 

 gen. 



IV. 0*475 grm. of Gouda cheese gave 0*532 grm. of ammo- 

 nio-chloride of platinum, equal to 7*11 per cent, of nitrogen. 



V. 0*444 grm. of Cheshire cheese gave 0*471 grm. of am- 

 monio-chloride of platinum, equal to 6*75 per cent, of nitro- 

 gen. 



VI. 0*477 grm. of double Gloucester cheese gave 0*525 

 grm. of ammonio-chloride of platinum, equal to 6*98 per cent, 

 of nitrogen. 



VII. 0*557 grm. of a very old double Gloucester cheese, 

 abounding in mites and mould, in the condition in which it is 

 sought after to gratify the depraved taste of the epicure, gave 

 0*463 grm. of ammonio-chloride of platinum, equal to 527 

 per cent, of nitrogen. 



We add here, as being similar in composition, the yolk of 

 the egg of the common fowl. 



VIII. 0*526 grm. of well-dried yolk gave 0*387 grm. of 

 ammonio-chloride of platinum, equal to 4*86 per cent, of ni- 

 trogen. 



* The balance used in these analyses having been made by Deleuil of 

 Paris, and being only furnished with French weights, will account for the 

 introduction of the word here, and in the other analyses throughout the 

 paper. The French gramme is equal to 15*444 English grains. 



