274 BOTANICAL GAZETTE [APRIL 
is with the efficiency ratios for the diastase in the presence of the 
various concentrations of the different salts that this paper has to 
deal. These ratios should be comparable throughout the entire 
TABLE IV 
EFFICIENCY OF DIASTATIC ACTION AS AFFECTED BY VARIOUS CONCENTRATIONS OF 
SIUM AND CALCIUM CHLORIDES, SINGLY AND COMBINED 
SINGLE SALTS CoMBINATIONS 
(Molecular proportions, 
KCl CaCl: BCI 3:CaCh2) 
iris Total salt con- 
ig 2 ogg Efficiency ow Efficiency centration a Efficiency 
2m 5.77 Mol. Retardation | 3m Retardation 
m/2 2.19 m/4 1.33 3m/4 1.24 
m 1.61 m/16 2.80 3m/16 2.73 
m/32 1.39 m/64 3.69 3m/64 2.87 
m/128 0.85 m/256 3.01 3m/25 2.87 
m/512 ©.93 m/1024 1.88 3m/1024 2.13 
m/2048 I.00 m/4096 1.07 3m/4096 eae | 
TABLE V 
EFFICIENCY OF DIASTATIC ACTION AS AFFECTED BY VARIOUS CONCENTRATIONS OF 
TASSIUM AND MAGNESIUM CHLORIDES, SINGLY AND COMBINED 
SINGLE SALTS 
PO ge aeuetianh 
KCl MgCl. KCl 4:MgCh 1) 
‘oncen' : Total salt con- 
bas sore gg Efficiency gp eg Efficiency centration n in Efficiency 
—_ 1.77 m/2 Retardation | 5m/2 Retardation 
m/2 2.19 m/8 2.25 5m/8 1.07 
m/8 1.61 m/32 2.07 5m/32 1.83 
m/32 1.39 m/128 1.07 5m/128 2.07 
m/128 0.85 m/512 1.35 5m/512 1.20 
m/512 0.093 m/2048 I.07 5m/2048 1.12 
m/2048 1.00, m/8192 1.00 5m/8192 1.08 
study; where they are less than unity the salt or salts have exerted 
a retarding influence upon hydrolysis; where they equal unity 
the salt treatment has been without effect; and where they are 
greater than unity the effect of the salts has been to accelerate the 
