Compounds of Albumin and Myosin. 305 
ate was washed on a pump with water, until no reaction could be 
obtained with potassium ferrocyanide for copper or with acetic acid 
and potassium ferrocyanide for albumin. The preparations were 
dried at 100° C., then powdered and further dried at 110° C., until of 
constant weight. The percentage of copper was first determined by 
simple ignition and weighing as cupric oxide. The oxide was then 
dissolved in dilute nitric acid, the copper precipitated as sulphide with 
hydrogen sulphide and weighed as subsulphide by ignition in hydro- 
gen gas with a little sulphur. Each series was made from a distinct 
preparation of albumin and nearly every compound made, was 
analyzed in duplicate. 
Following are the analytical results : 
Sertss L. 
With CuSO,,. 
No. Am’tsub.taken. Wt. CuO. Per cent. Cu. Wt. Cu.8. Per cent. Cu 
la 0°5621 gram. 0:0081 gram. 1:13 0:0070 gram. 0:97 
b 0°5176 0:0078 1:19 0:0065 0:98 
With Cu(C,H,0,),. 
2a 0°5479 0:0088 1:27 ee x a 
b 05703 0-0091 1°26 0:0078 1:08 
Seriss IT. 
With CuSO,, 
la 0:5273 gram. 0.0067 gram. 1:00 0-0053 gram. 0:79 
b 0-7075 0:0083 0:93 00068 0:76 
With Cu(C,H,9,).. 
27 0:5697 0:0081 TeAg 0:0071 0:98 
b 0:5005 0:0073 1:15 0:0061 0:95 
Series III. 
With CuSO, 
la 0°6235 gram. 0°0085 gram. 1:07 age Sah 
b 0°6705 0:0091 1:07 0-0088 gram. 1.04 
With Cu(C,H,O,).. 
2a 0°8302 0:0130 1°24. 5 Ae E Tae 
b 0°9400 0°0151 1-27 Lane 
Trans. Conn. AcAD., Vou. VII. 39 Nov., 1886. 
