96 STORRS AGRICULTURAL EXPERIMENT STATION. 
TABLE 28—Continued. 







<5 $e a OE gs. st 
No. OF EXPERIMENT. ace ea UY ae Ys | Gs 
Hg om oo “3 Org inet 
pA A so AWA aa Par ors aR 
< 
9 hours—Continued. 
6, - - : 14,500 — — 4,000 |. 28°) 34525 
75. eae - 715500 = a 9,625 | 13 | 2,936 
Ot gi) Tamag - 10,775 at aa 33939 | 37 938 
9, - - - 6,250 —_ — T, 025 +026 525 
LO eee i - 5,021 ay aia 1,458 | 29 563 
ef - - - 5,958 — — 1,025. |) 27 “pase ao 
t2, : - d _ _- — cae — — 
Average, ie ¥ 165,576 ras tay 5,509 23 I,41t 
r2 hours. 
Ts a : - 114,250 — — 68,400 | 60 | I,900 
2, = = * 256,667 oar aa 5,417 2 | 4,917 
3; a 7 i 79,500 oe ar IT,250 2 6,250 
A, 2 - a | = Pos —- as — = 
5, : - =e Oe 20,000 — — 10,250 | O | 4,000 
6, 2 = z 41,938 eng. ie, 7500 18 17,312 
Fh - - ~ | Ey22638 — — 20,000 | I2 | 3,000 
8, : = * 28 ,042 me ase I4,900 | 53 | 2,155 
9, - - - 20,850 — — 5,107. | 25. an oeg 
10, : - : — — — — — — 
i: - = = — — = oe — — 
2. . z 2 = — — — — — 
Average, - : 930, 385 — L— .) | "16, O10 s 22gi ae eae 







of the so-called ‘‘germicidal action.’’ The amount of the de- 
crease varies greatly in the different experiments. Not infre- 
quently more than 50 per cent. of the bacteria present in the 
fresh milk had disappeared at the time when the organisms had 
reached the minimum. Frequently, however, the decrease was 
very slight, and a few experiments show no decrease whatever, 
but on the contrary a continuous increase. ‘This fact does not 
prove, however, that there was no decrease, for it may have 
taken place between the periods when the plates were made, so 
that its appearance was lost by our method of work. As pre- 
viously stated, the samples from which the figures in Tables 28 
and 29 were obtained were kept at a constant temperature of 
20°C., and, as might be expected, the decrease in numbers 
reached the minimum at a comparatively early hour, in most 
cases the plates made at the end of three hours showing the 
smallest numbers. In two instances, experiments 4 and 5, in 
Table 29, the minimum was not reached until the milk was 
eight hours old, there being a somewhat gradual decrease ‘up 
to that time. 
