70 Chittenden and Painter—Influence of Therapeutic 
Here, unlike the cyanide, there is stimulation of the ferment. 
Retardation of amylolytic action requires much larger percentages ; 
thus 1°0 per cent. of ferrocyanide completely prevented the formation 
of reducing bodies, although soluble starch was apparently formed, as 
also in the presence of 5-0 per cent. of the salt. 
Potassium ferricyanide. 
The action of this salt is almost identical with that of the ferro- 
cyanide. 
Total amount Starch 
KgFeeg(CN) 1 2- Wt. Cu in ¥. reducing bodies. converted. 
0 0:1417 gram.. 0°2884 gram. 25°96 per cent. 
0°025 per cent. 071515 0°3088 27°79 
0°100 0°1295 0°2636 23°72 
0°250 0:0975 0°1984 17°85 
Like the ferrocyanide, this salt in 1:0 and 5-0 per cent. solutions 
allows the partial conversion of starch into soluble products, but 
no reducing bodies are formed. 
Potassium nitrate and potassium chlorate. 
Potassium Total amount Starch 
salt. Wt. Cuin ¥. reducing bodies. converted. 
0 0°1513 gram. 0°3080 gram. 27-72 per cent. 
KNQ3. 
0°20 percent.  0°1550 0°3164 28°47 
0°50 0°1528 0°3108 27°97 
1:00 0°1462 0:2976 26°78 
KCIO3. 
0°20 071581 0°3228 29°05 
0°50 0°1580 0°3228 29°05 
1:00 0°1600 0°3268 29°41 
With 5-0 per cent. of the salts, the following results were obtained: 
Potassium Total amount Starch 
salt. 
Wt. Cuin 4. reducing bodies. converted. 
0 0°1672 gram. 0°3416 gram. 30°74 per cent. 
KNOs (5:0 pr. ct.) 071559 0°3176 28°58 
KClO0; (5:0 pr. ct.) 0°1351 02752 24°76 
With these two salts it is very obvious that small fractions of one 
per cent. decidedly increase amylolytic action and that potassium 
chlorate is the more energetic of the two in this respect. With one 
per cent. of the salts, potassium chlorate still shows increased action, 
while the nitrate causes a decrease of amylolytic activity; in the 
presence of 5 per cent. of the salts, on the other hand, potassium 
chlorate causes the greatest decrease in ferment action. 
Of these two oxidizing agents, potassium chlorate does not appear 
to have been hitherto experimented with, but with potassium nitrate 
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a 
