351 
The influence of temperature on the rennin coagulation has been 
studied by Fuld (46). Some of his results are given in the following 
table : 
Temperature (°C.). 
25.05 
54 
185 
30 
32 
312 
327 
35 
17 
588 
574 
40 
10.2 
980 
980 
44 
9 
1,111 
1,491 
50 . 
14.7 
680 
2, 742 
Time (sec.), k, observed, k, calculated. 
(The values of k, observed equal 10 000 divided by time.) 
It will be observed that there is a good agreement between the 
observed and the calculated values up to 40° C. Above this tem- 
perature the observed values of k become smaller than the calculated 
values on account of the gradual destruction of rennin by heat. 
In 1870 Segelke and Storch (47) showed that rennin coagulates 
milk in intervals which are inversely proportional to the concentra- 
tion of the rennin solution. This conclusion has been confirmed by 
the later work of a number of observers. Thus Lorcher (48) obtained 
the following results from his measurements: 
Quantity 
I of rennin, 
incc. 
Time of co- 
agulation, 
minutes. 
Product. 
0.01 
.02 
245V 
490 | 
.03 
155 
465 
.04 
126. 5 • 
485 | 
.05 
92 
460 
.06 
78 
468 
.07 
69. 25 
485 
.08 
63 
504 
.09 
56 
504 
.10 
43 
430 
.20 
24.5 
490 
.30 
16 
480 
.40 
12.5 
500 
. 50 
10 
500 
.60 
8. 75 
525 
.70 
8. 16 
561 
.80 
7. 5 
600 
.90 
6. 7 
603 
L0 
6. 
600 
Recently Madsen (49) has also investigated the effect of concen- 
tration of the rennin on the rennin coagulation, working at a tern- 
