80 Chittenden and Painter—Influence of Therapeutic 
known, increase or decrease in the amount of ferment is not always 
followed by a proportionate change in the amount of reducing bodies 
formed. Of these two views the former is by far the most probable. 
Certainly the ferment is not mechanically precipitated by the formation 
of a mercury-albumin prcipitate; if such were the case with 10 c.c. of 
saliva and 0-001 per cent. of mercuric chloride, decided retardation 
ought to have been observed. 
Action of cupric sulphate in the presence of larger amounts of 
CusO4 +5H» O. 
0 
0°0005 per cent. 
0 
0°0005 per cent. 
0 
0:0005 per cent. 
Wt. Cuin 4. 
Serment and proteid matter. 
a. witn 10 ¢c.c. saliva. 
Total amount 
reducing bodies. 
0°1830 gram. 03748 gram, 
01775 0°3628 
Difference, 
b. with 5 c.e. saliva. 
0°1745 gram. 0°3568 gram. 
0°1640 0°3352 
Difference, 
c. with 2 c.c¢. saliva. 
0:1645 gram. 0°3360 gram. 
0:1140 0°2320 
Difference, 
Starch 
conyerted. 
33°73 per cent. 
32°65 
1:08 
32°11 per cent. 
30°16 
1°95 
30°24 per cent. 
20°88 
9°36 
Action of zinc sulphate in the presence of larger amounts of ferment 
ZuSO4 +7H,0. 
0 
0°05 per cent. 
0 
0°05 per cent. 
0 
0°05 per cent. 
Wt. Cuin 4. 
and proteid matter. 
a. with 10 ¢.c¢. saliva. 
Total amount 
reducing bodies. 
0°3748 gram. 
0°3552 
0°1830 gram. 
O-1737 
Difference, 
b. with 5 c.c. saliva. 
0°1745 gram. 0°3568 gram. 
01610 3288 
Difference, 
c. with 2c. ¢. saliva. 
0°1645 gram. 0°3360 gram. 
0:1320 0°2688 
Difference, 
Starch 
converted. 
33°73 per cent. 
31°96 
Lr rf 
32°11 per cent. 
29°59 
2°52 
30°24 per cent. 
24.19 
6°05 
