Changes in Albuminous Substances during Digestion. 403 



The same experiments were repeated on casein and albumin, 

 and the following results obtained. 



A small quantity of muriatic acid was added to milk ; a pre- 

 cipitate fell, which was washed for a long time with water. At 

 last the mass began to be gelatinous ; in this state it was mixed 

 with water and set aside at a temperature of about 40° C. After 

 some hours the whole was dissolved, and the butter rose to the 

 top. The watery solution was decanted, thrown down by car- 

 bonate of ammonia, and the precipitate washed with water, alco- 

 hol and ether, and dried at a temperature of 130° C. 



0-5568 grms. produced 00033 ash. 



I. 1-586 " gave after being burned with caustic soda and 



nitre, 0-07, BaO, SO 3 . 

 II. 1-914 grms. s?ave 0101, BaO, SO 3 . 

 I. 0-6512 " without ash, gave 83 cub. cent, of moist N at 



16°-5 and 766 m. m. 

 II. 0-6542 " without ash, " 85 cub. cent, of moist N at 



16°-5 and 766 m. m. 

 I. 0-5652 « 

 H. 0-6113 " 



1-1065 CO 2 and03569H 2 O. 



" 1-1885 " 



Dissolved and thrown down. 



c, 



N, 



s, 



free of ash, 



Undissolved casein.* 



53-8 



71 

 156 



22 6 



0-9 



shown as well as Schlossberger,f 



« 0-3816 



53-44 



701 



1501 



23-93 



0-61 



5308 



6-93 



15-30 



23-96 



0-73 



body ; it consists of different protein compounds, of which the 

 body that I have now studied constitutes the chief element. It 

 is characterized by a somewhat smaller amount of sulphur, and 

 is distinguished besides from the mixture hitherto called casein, 

 by the circumstance that it contains more oxygen. It shows the 

 reaction of sulphamid-protein. 



H, 



N, 



53-5 



70 



15-0 



23-9 



0-6 



53-4 



6-9 

 145 



23-9 



Without SNaH*. 



511 



7 

 14-7 



24-2 



# • 



1000 



98-7 



1000 



Albumin of eggs, coagulated by heat, was mixed with di utea 

 muriatic acid, and after the addition of a small piece °f rennet, 

 set aside at a temperature of 40° C. After some days the albu- 

 min was completely dissolved. To the filtered liqui d carbonate 



* Scheik. Onderz., Deel iv, p. 278. . p , rmno Anr :i igig n 92. 



• Ibid, Deel Hi, p. 453, and Annalen der Chemie und Pharmac, April, IB4D, p .*. 



