Relative Amylolytic Action of Saliva and Diastase of Malt. 129 
Series VIII.—Mautt Extract. 
Temperature. Wt. Cu in 4%. caameines Dodies. conrartedl 
30° C. 01301 gram. 0:2648 gram. 23°83 per cent. 
40 01471 0°2996 26°96 
45 0°1542 03148 28°33 
50 01488 0°3036 27°31 
55 0°1320 0°2688 24°19 
60 0°0691 0°1412 See) 
65 0°0654 0°1340 12°06 
Series [X.—MaAtr ExtRAct. 
Total amount Starch 
Temperature. Wt. Cuin 4. reducing bodies. converted. 
30n C0; 01283 gram. 0°2612 gram. 23°50 per cent. 
35 0°1435 © 0°2924 26°31 
40 0°1507 03072 27-64. 
45 , 071562 0:3188 28°69 
484 071573 0°3208 28°87 
50 0°1588 0°3244 29°19 
55 0°1445 0°2944. 26°45 
60 0:0742 0°1516 13°64 
65 00561 0°1152 10°36 
SERIES X.—MALT EXTRACT. 
Total amount Starch 
Temperature. Wt. Cu in ¥. reducing bodies. converted. 
40° C. 0°1419 gram. 0:3042 gram. 27°36 per cent. 
2 0°0299 0°:0636 572 
By a study of these results, it is evident that in the case of the 
salivary ferment, variations in amylolytic action are not very great 
between the temperatures of 20° and 50°, or even 55° C. With the 
temperatures experimented with, however, amylolytic action appears 
to reach its maximum, in the case of saliva, at 40°; although in one 
single instance, for some unaccountable reason it appeared to be 
greater at 50°C. With the diastase of malt on the other hand, 
amylolytic action reaches its maximum at 50° C., although in one in_ 
stance it appeared somewhat greater at 55° C.; great variations, how- 
ever, are not to be observed between the temperatures of 30° and 55° 
C. Brown and Heron,* working with extract of malt and pure potato 
starch at different temperatures, obtained results by determination of 
both specific rotary power and cupric oxide-reducing power, which 
point to the same conclusions as those obtained by us. Thus at 40° C., 
the malt extract having been previously heated at the same temperature 
for 20 minutes, these investigators found at the end of 30 minutes, as 
* Liebig’s Annalen der Chemie, vol. excix, p. 221. Also Journal Chem. Soc., 1879. 
TRANS. Conn. Acap., Vou. VII. 17 Oot., 1885. 
