110 Scientific Intelligence. 



by calculation from this and from Mulder's formula C 4o H 31 N 5 O l2 , 

 are subjoined. 



Mulder's formula. Proposed formula. 



C 54-92 53-93 



H 709 6-36 



N 16 02 15-73 



O 21-96 24-34 



99-99 100-36 



The following are some analyses of proteine, albumen and fibrine from 

 different sources. I, Proteine from albumen. II, Albumen, (Mulder.*) 

 III. and IV, Proteine, (Fleitmann.t) V. and VI, Albumen from the 

 flesh-fluid of fowls, (Wiedenbusch.J) VII, Fibrine, (Mulder.§) 



1. II. III. IV. 



C 53-7 53-6 541 538 



H 6-9 70 713 7 3 



N 14-4 15-7 15-94 1624 



O J23-6) 24-3 J22-3) 23 0(21-41) 22-12 f 21-23 ) 21-94 



S \ 1-4 I ) 1-4 f f 1-42 ( ) 1-43 



99-3 99-3 99-39 9928 



V. VI. VII. 



O 5305 53-31 52 7 



H 710 6-96 6-9 



N 15-82 15-69 15-4 



O f 22-29) 2306 (22-28) 2307 (23-5) 241 



S { 1 55 j \ 1 57 J \ 1-2 



Ash -19 -19 Ph -03 



99-22 99-22 9913 



On comparing these different numbers with each other and with the 

 results of calculation, it will be seen that the proportions vary consid- 

 erably ; these differences show the liability of the substances to change, 

 and also the frequent mixture of a body which seems to be like a fat 

 in composition, containing no azote and little oxygen, while it is richer 

 than proteine in hydrogen, and is perhaps a result of the alteration of 

 the proteine itself. In Mulder's formula the carbon is from one to two 

 per cent, above that yielded by the analyses, while the oxygen falls 

 nearly as much below that obtained in several instances. This is seen 

 still more strikingly if we regard the sulphur as metaleptic of oxygen 

 in the compound, as I have represented it in the formulas. The first 

 and seventh analyses correspond much more closely to my proposed 

 formula, and this in the case of fibrine, is more clearly seen when we 

 correct that for 100 parts, making it C 5315 023*72, which with '6 

 corresponding to 1*2 of sulphur, gives 2432. 



The reaction of proteine with strong hydrochloric acid by which it is 

 resolved into ammonia and humic acid, a product identical with that 

 derived by the action of the same acid from sugar, is explained by 





*Chem. Gazette, No. 115, p. 304. \ Ann. derChem. und Pharm., t. Ixi,p.l21. 



X ibid, t. lxi, p. 371. § This Journal, ii ser., vol. iv, p. 402. 



