166 Professor Mulder 



certain than those for all empirical formula}. We have seen this in 

 the case of salicine. All the empirical formula?, which equally ex- 

 pressed the composition of salicine, fell to the ground after Piria 

 had discovered its constitution. Yet the formula above given brings 

 us a little nearer to the truth. 



Perhaps it may be said, — And so every thing is modified that 

 you have formerly stated regarding protein ? On the contrary, 

 nothing is modified but the formula. Science retains what it pos- 

 sessed, viz : that — 



l^^, The vegetable and animal albuminous bodies contain in com- 

 mon an organic group free from sulphur. 



2d, There are two groups to be considered as higher degrees of 

 oxidation of the former, and produced from protein. 



I will give you the new form, into which my previous results re- 

 quire to be moulded. It will thence be evident to you, that with 

 the exception of the nitrogen of the protein itself, nothing at all of 

 my former results i^ altered. 



Albumen from eggs, according to my former analyses,* and those 

 of Ruling,! (C = 75-12; JS = 87*5), and the new determinations of 

 sulphur consists of 



S 1-6 1-7 0-4 1-6 



This composition represents a combinaticn of 20 equiv. of pro- 

 tein + H O, with 8 equiv. of sulphamid and 1 equiv. of phosphamid. 

 Kemp designates this explanation by the name of an artifice. This 

 expression, however, is not accurate. It is nothing else than an at- 

 tempt on my part, to give a certain form to what I have found. If 

 the quantity of phosphamid in the combustion were double, it would 

 be reduced to the simple form of 2 equiv. of protein + 1 equiv. of 

 amid of sulphur and phosphorus. 



Now, by the influence of chlorine, this albumen combines, with- 

 out undergoing a change, with chlorous acid, and the product is 

 chlorite of albumen, I. J which I before wrongly called chlorite of 

 protein ; I add, II. § chlorite of casein, and, III.,|1 chlorite of fibrin. 



* Scheik. Onderz. deel iii. f Ann. der Chem. und Pharm., 1846. 



i BuUetin, 1839, p. 400. § Ibid, 1| Ibi4. 



