FHYSIOLOGICAL ACTION OF AMIDOSULPHONIC ACID. 491 
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3 
4 
5 
6 
7 
8 
9 
10 
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A 
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7 
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Rice. 
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B 
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7 
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Barley . 
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A 
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Soya bean . 
B 
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7 
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Turnips . 
1 B 
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These results demonstrate again the noxious effects of the 
amidosulphonic acid, but how the differences in poisonous intensity 
are to be accounted for, I am unable to say. Perhaps the calcium 
salt of that acid penetrates more easily into the embryo of one 
kind than into those of the other. Thus it might also be explained 
why seeds of buckwheat and sunflowers were not damaged at all 
by the same treatment as killed all the soya germs completely 
(see table). 
V. Experiments with Yeast . 
It appeared to me of some interest to see whether the amido¬ 
sulphonic acid would also show a noxious influence upon yeast. 
For this purpose, I distributed 10 cc. of thick beer yeast in 
distilled water and diluted the mixture to 100 cc. After well 
shaking, I took 10 cc. of the mixture immediately after shaking 
and added 90 cc. of a glucose solution containing 6.856 grams 
pure glucose, o. 1 gram magnesium sulphate, 0.2 gram dihydro¬ 
potassium phosphate, and o. 1 gram, sodium amidosulphonate, A. 
In the control case instead of the last, ammonium sulphate 
was used, B. 
