166 
TRANSACTIONS OF THE 
TABLE III. 
Orothocresol—0.125%. r—=10.7-+1.98t 
| r—obs. 
r—cale. 
: eee | minutes minutes 
| | 
| (17.5) 28.9 
46.8 A7.1 | 
66.4 65.3 
82.3 83.6 | 
102.4 101.8 
119.5 119.6 | 
Pee 8 EEG SANTEE SE. 
TABLE IV. 
Pyrocatechin—0.5 %. r—2.52t-36.3 
——————— 
t |  r-obs. r—cale. 
minutes | minutes minutes 
TABLE V. 
Resorcin—0.25 %. r—=9.03-+-0.15t 
oF r—obs. r—cale. 
minutes minutes minutes 
70 
140 
210 
