104 
Scientific Proceedings (43). 
but entirely from the extra protein which is destroyed, due to the 
presence of the toxic substance. We cannot state with any degree 
of certainty, what the character of the intermediary processes is, 
but that it is specific and peculiar seems very probable, for none 
of the extra N destroyed goes over into urea. It is all eliminated 
either as glycocoll or as undetermined N. 
Table II. 
Rabbit No. 6. 
Date, 191 1. 
Period. 
II 
Weight. 
Total 
N. 
D • 
Per 
Cent, of 
Total 
N. 
W 
Per 
Cent, of 
Total N. 
Hippu- 
ric Acid, 
N. 
Per 
Cent, of 
Total 
N. 
Benzoic 
Acid 
Fed. 
March 12 
March 13 
March 14 
I. 
II. 
III. 
1.8 
1.72 
1.60 
O.802 
1. 147 
0.913 
0.7024 
0.796 
0.782 
87.6 
69.4 
85.67 
0.232 
0.36 
0.166 
2.89 
3.177 
1.82 
0.088 
7-7 
1-7 
Rabbit No. 7. 
March 23 
March 24 
March 25 
I. 1 
II. 
III. 
I.96 
I.7I 
1.68 
0.596 
I.369 
1. 199 
0.487 
0.9673 
I.0898 2 
81.68 
70.66 
0.043 
0.1127 
7.23 
8.23 
0.082 
6.0 
1.7 
63 (588) 
Experiments on the diffusibility of alkaloids through rubbers 
By J. B. SIDBURY and WILLIAM J. GlES. 
[From the Laboratory of Biological Chemistry, of Columbia Uni- 
versity, at the College of Physicians and Surgeons, New York.] 
Rosenbloom and Gies have found that various ether-soluble 
substances, when dissolved in ether and placed in rubber bags 
immersed in ether, readily pass through the rubber membranes 
Period of about 12 hours. 
2 Urea-fNH 3 N =90.9 per cent. 
3 This study is one of a projected series on physico-chemical conditions in the cell, 
which in turn constitutes a section of a comprehensive plan of research on the com- 
position of protoplasm as well as the structural and dynamic relationships of cell con- 
stituents and products. These investigations are now in progress in the Laboratory 
of Biological Chemistry of Columbia University, at the College of Physicians and 
Surgeons, and under the auspices of the George Crocker Special Research Fund. 
