Toxio AND ANTITOXxIC EFFEOTS oF Ions’ 715 
pure NaCl solution in a way similar to that of Ca ions 
(see Table IV). 
TABLE III 
Percentage 
Solution of Eggs Yielding 
Embryos 
100 c.c. $m NaNO, 5 
100 ae +he.c. 7 Ca(NO,), 48 
100 “ “ + 1 “ 6c 40 
100 “ “ + 9 it “ 63 
100 “ “ce + 4 “ o 66 
100 “ iT3 + 8 “ “c 70 
100 sf 1 
100 “ ity + $ “ “ 8 
100 6 “ + 1 6c oe 9 
100 “ “ + 2 “c iy 45 
100 “ 66 + 4 [79 it 42, 
100 “c “ce + 8 “ “ 70 
100 “ 0 
100 it “ “ 6“ 
100 6c “ce a “ « : 
100 6c 73 +2 6“ 7 
100 7] “ + 4 “ “ 10 
100 iT3 “ + 8 [77 ty 50 
TABLE IV 
Percentage 
Solution of Eggs Yielding 
Embryos 
AL erative 100 c.c. £m NaCl 0 
De barred ans 100 es “« +4¢.c.m BaCl, 75 
® gon weds 100 & 90 
Wate tes Benes 100 ff « +492 “ MgCl 75 
ae 100 « « 149 ee. 4m SrCl, 90 
nee 1002 4 aE «OF & Ga(NO,), 80 
That the threshold for the antitoxic effects of Ba, Mg, 
Sr has the same magnitude as that of Ca may be indicated 
by a single experiment with Ba (Table V). 
It can be seen that the threshold of the antitoxic effect 
of barium is almost identical with that for Ca under similar 
conditions. 
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