116 Chittenden and Cummins—Influence of various Substances 
amylolytic ferment of saliva and on the proteolytic ferment of 
gastric juice was equally decided, even with very small pecentages. 
Undigested Fibrin Relative proteo- 
KCN. residue. digested. lytic action. 
0 0°2668 gram. 73°32 per cent. 100°0 
0°005 per cent. 0°2790 72°10 98°3 
0°025 0°2840 71°60 97°6 
0°050 0°2678 73°22 99°8 
0°100 0°2600 74:00 100°9 
; 0 0°3675 63°25 . 1000 
0°3 0:2076 79°24 125°2 
0°5 0°1985 80°15 126°7 
10 0:2697* 73°03 115°4 
115) 0°3315* 66°85 105°6 
Potassium ferrocyanide and Potassium ferricyanide. 
With these two salts the following results were obtained : 
Undigested Fibrin Relative proteo 
K4Fe(CN) 5+3H, 0. residue. digested. lytic action. 
0 0°3045 gram. 69°55 per cent. 100°0 
0°005 per cent. 0°3363 66°37 9574 
0°50 0°3293 67:07 96°4 
2°00 0°3753 62°47 89°8 
K,¢Fe(CN))¢ 
0°005 per cent. 0°3268 67°32 96°8 
0°05 0°3370 66°30 95°3 
2°00 0°3912 69°88 875 
Here, unlike the cyanide, there is no acceleration in the proteolytic 
action of the ferment, neither on the other hand is there very pro- 
nounced retardation; less indeed than is produced by a like per- 
centage (2°0) of sodium chloride. 
Sodium tetraborate. 
With this salt we obtained the following results: j 
Undigested Fibrin Relative proteo- 
NaeB407+10H20. residue. digested. lytic action 
0 0:4116 gram. 58°84 per cent. 10070 
0:05 per cent. 0°3729 62°71 106°5 
0°2 0°3260 67°40 114°5 
0° 0°2332 76°68 130°3 
1:0 071860 81°40 138°3 
2°0 0°1663 83°37 141.7 
3°0 0°2276 77°24 13i°2 
5°0 0°3141 68°59 116°5 
* Tt was impossible to wash these completely, consequently the weights are 
undoubtedly too high. 
