THE PECTIC SUBSTANCES 



69 



zyme and calcium salts were unknown, there was nothing 

 to be gained by calculating the measurements as absolute 

 values. Accordingly, they were all recorded as seconds of 

 time for the emptying of the bulb of the standard^at the 

 temperature of the experiment. The times of flow for 

 water at were from 3-0 to 3-8 seconds, and the initial 



z . 







. 



TIME IN HOURS 



FIG. 3. 



values for the solutions, measured five minutes after mix- 

 ing, were from 3-8 to 7 seconds. The results of five experi- 

 ments are shown in the accompanying viscosity time graph. 

 The first series of determinations (Experiment I.) was 

 carried out at 0. In it, after several hours had elapsed, 

 but little change in the viscosity could be perceived. It 

 then increased rapidly, till after eight hours, when the 



