﻿1903] 



CHEMICAL STIMULATION 



165 



TABLE XII. 



December 4. Test of 



M 



Time 



I'^A^^ 5*32 



8 : 10 



8 : 10-10 : 10 



M 



1000 



1000 



ZnS04 at 36^ C, 



Experiment 



0.109 



ZnSO^ in exp. bottle 



0.207 



TABLE XIIL 



If the results of these experiments 

 with zinc are roughly summed up for 

 comparison, it will be seen that the 



high acceleration bj 



M 



4000 



presents the 



only exception to the rule that the 

 more zinc applied, the more CO^ is 

 driven off. The figures here are the 

 per cent, increment of CO3 evolved 

 after poisoning. The numerator (M) 

 of the fractions is omitted. 



The experiments on the influence of 



copper will be taken up next. The temperature in all of these 



was in the neighborhood of 20^ C. 



TABLE XIV, 



i 



January 20. Test of 



M 



80000 



CuSO^ 



Time 



Control 



10:08-3:55 



3:55 



3:55 

 5:01 



7:35 

 7:35 



M 



80000 



5:01 

 7: 16 



Same 



-8:36 



M 



respiration. 



0.030 



CUSO4 in exp. 



0.030 

 0.027 

 dose given to 

 0.031 



bottle. 



0.030 

 0.027 

 control. 



is then without demonstrable influence on the 



