1917] Mitra: Toxic and Antagonistic Effects of Salts on Wine Yeast 



93 



been increased to IIV2 millions. On the other hand, the smaller con- 

 centrations of MgCL with higher concentrations of KC1 did not show 

 any antagonism. The reason for this unexpected result is perhaps 

 that previously mentioned in the case of KC1 vs. CaCl, in Series VII. 



Table 10 — Antagonistic Effects Between KCl and MgCl 2 



KCl vs. 

 Xo. MgCl 2 M. Cone. 48 hrs. 96 hrs. 144 hrs. 192 hrs. 240 hrs. 



A .00 x .00 2,356,000 9,701,000 12,170,000 14,890,000 17,526,000 



B .00 x 1.2 



C .001x1.0 226,000 1,130,000 2,260,000 3,845,000 



D .01 x .9 226,000 1,356,000 6,780,000 10,070,000 11,560,000 



E .1 x .8 1,130,000 6,780,000 7,408,000 10,975,000 12,180,000 



F .2 x .7 1,356,000 7,458,000 11,578,000 13,449,000 L4,328, 



G .4 x .6 2,486,000 4,838,000 7,006,000 14,690,000 15,500,000 



H .6 x .5 904,000 3,816,000 5,296,000 12,850,000 16,280,000 



I .8 x .4 678,000 2,612,000 4,852,000 8,286,000 9,856,000 



J 1.0 X .3 452,000 2,260,000 3,706,000 5,463,000 5,902,000 



K 1.2 x .2 452,000 2,040,000 3,295,000 4,895,000 5,240,000 



L 1.4 x .1 678,000 1,926,000 2,940,000 3,656,000 4,864,000 



M 1.6 x .05 226,000 904,000 3,050,000 3,006,000 4,628,000 



N 1.8 x .01 226,000 2,260,000 2,990,000 3,862,000 



O 2.0 X .001 2,226,000 1,130,000 



P 2.2 x .00 



B C 

 KCl 



D 



F G H I J 



Concentration of salts 



M X 

 MgCl 2 



Fig. 10. — Curves of yeast growth showing antagonism between KCl and 

 MgCL. The ortlinates represent the number of yeast cells in millions ami the 

 abscissae, the concentration of salts in combination. Th* 1 ordinate at A repre- 

 sents the number of cells in blank cultures. 



