vni COPPER-COMPOUNDS OF ALBUMINS 305 



Werigo, 1 Stohmann and Langbein, 2 Billow, 3 Brunner, 4 Baal, 5 Schulz, 6 

 and Galeotti. 7 



The greatest amount of copper is bound by vegetable proteids, for 

 Ritthausen gives these percentage figures : 



CuO. Ash. 



Gluten-caseinogen from wheat . . 16 '9 7 + 



Legumin from peas / .15-61 1-21 



Spelt-gluten-caseinogen . . . 15 '2 3 0*57 



Legumin from broad beans . . 14' 10 3 '05 



Legumin from oats . . . 13 '5 3 



Conglutin from lupines . . . . 13-38-1-1 '60 0'43-2'16 



For animal albumins the following percentage figures are given : 



An albuminate from the sepia-case (Schulz) . 20 per cent CuO 



Milk-casein (Ritthausen and Pott) . . .16-17 



Egg-white: F. Rose . . . 1 -6-1 '69 



Mulder . . . 4 '4 4 



Mitscherlich . . . . . 2 '8-3 '3 



Lieberkiihn . . . . 4 '6 



Bielitski . . . 4'72-5'19 



Lassaigne . . . . 4 '9 5 



Harnack (a) preparation . . 1*35 



(b) preparation . . 2 '6 4 



1 B. Werigo, Pftiiger's Arch. 48. 127 (1890). 



2 F. Stohmann and H. Langbein, Journ. f. prakt. Chem. 44. 336 (1891). 



3 K. Billow, Pfiuger's Arch. 58. 207 (1894). 



4 A. Brunner, Uber AlbuminftiMung durch Schwermetalle, Dissertation, Wiirzburg, 

 1897. 



5 C. Paal, (a) 'Action of fixed Alkalies on Egg-albumin,' Ber. d. deutsch. chem. 

 Ges. 35. 2195 (1902); (b) 'Colloidal Silver - oxide, ' ibid. p. 2206; (c) 'Colloidal 

 Mercuric Oxide,' ibid. p. 2219; (d) 'Colloidal Silver,' ibid. p. 2224; (e) 'Colloidal 

 Gold,' ibid. p. 2236. 



6 Fr. N. Schulz, Die Grosse des Eiweissmolekills. Jena, 1903 (Gustav Fischer). 



7 G. Galeotti, Zeitschr. /. physiol. Chem. 40. 492 (1904). 



[TABLE 

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