Percentage change of weight. 
64 D. Thoclay. 
marked contrast with the rapid fall of the curves for all strengths 
of mercuric chloride. 
Mercuric cyanide. The toxic effect of mercuric cyanide in 
similar concentrations was at first simply evidenced (Fig. 5) by 
depression of the rate of entry of water below that in equi-molecular 
sucrose solutions. Eventually, however, a fall in weight ensued, 
which was less rapid and set in much later than with mercuric 
chloride, but was more pronounced than with osmic acid. 
Fig. 5. Mercuric cyanide. 
Chloroform. The effect of the M/20 solution of chloroform 
(Fig. 6) illustrates in a striking way the powerful effect of chloroform 
in increasing the permeability of protoplasm to solutes. The curves 
for the weaker solutions are similar to that for distilled water, but 
at lower levels—a type of curve apparently distinct from those 
already figured. 
