500 
SEDGWICK AND WINSLOW. 
BACILLUS OF TYPHOID FEVER. 
Kace a. 
Series I. 
NuiiiJ>er 
of TuJ*«. 
91 
92 
9i 
9(» 
97 
98 
100 
111 
112 
113 
114 
115 
116 
117 
118 
120 
Average befortj 
JjVeeziiig. 
41)010 
22785 
348:590 
308385 
107580 
li77515 
50820 
COO 
34090 
23875 
29750 
o 
8290 
31500 
4G585 
21 
48335 
38430 
25200 
A I'cragcs 
After One Freezing 
Average. 
175 
26320 
1735 
535 
40 
745 
180 
190 
380 
2G5 
1785 
75 
17 
4450 
155 
215 
Reduction 
f)er cent. 
99.3 
92.5 
99.5 
99.7 
99.9 
98.5 
70.0 
99.4 
99.5 
97.1 
99.3 
04.3 
99.8 
90.8 
99.0 
99.1 
90.1 
After Two Freezings. 
Average, 
6 
2495 
171 
G 
1 
290 
4 
65 
80 
355 
40 
1232 
3 
15 
3895 
11 
14 
Reduetion 
per cent. 
99.9 
99.3 
99.9 
99.9 
99.9 
99.4 
99.3 
99.9 
99.9 
98.5 
99.9 
96.1 
99.9 
91.9 
99.9 
99.9 
98.9 
After Three Freezings. 
Average. 
1 
644 
59 
2 
3 
200 
1 
16 
22 
33 
3 
416 
23 
2 
2440 
2 
2 
Reduction 
per cent. 
99.9 
99.9 
99.9 
99.9 
99.9 
99.6 
99.8 
99.9 
99.9 
99.9 
99.9 
98.7 
99.9 
95.0 
99.9 
99.9 
99.5 
After Four Freezings. 
Average 
8 
20 
13 

42 
I 
3 
2 
2 
3 
ReductioTi 
per cent. 
3 
99.9 
147 
99.9 
2 
99.9 
2 
99.9 
2 
99.9 
120 
99.8 
F 
99.9 
99.9 
99.9 
100.0 
98.6 
99.9 
99.9 
99.9 
99.8 
TuhoR 91-100, frozen March 28, 1898; thawed and sampled and refrozen, on each of the four days succeeding. Tubes 
rLiiiaintd frozen 18 hours ea(;h time. 
Tubes 111-120, treated in same nuinner week of April 11, 1898. 
Race B. 
Series I 
Namber 
of Tube. 
1 
3 
4 
6 
7 
8 
9 
10 
12 
13 
11 
15 
16 
17 
18 
19 
20 
Average before 
Freeziug. 
4G950 
222G0 
12810 
12145 
10(U0 
8715 
7945 
4190 
2520 
2450 
11.^290 
142G95 
1 8.".385 
74970 
138915 
227745 
104205 
107730 
163485 
120015 
Averages 
After One Freezing. 
Average. 
420 
155 
315 
215 
20 
120 
80 
G5 
85 
95 
775 
1980 
1140 
480 
11805 
670 
12.^0 
650 
390 
Reduction 
pPF cent. 
99.1 
99.3 
97.5 
98.2 
99.8 
98.6 
99.0 
98.4 
9G.6 
96.1 
99.3 
98.6 
99.8 
98.5 
99.7 
94.8 
99.4 
98.8 
99.6 
99.7 
98.5 
After Two Freezings 
Average, 
67 
24 
21 
52 
10 
10 
13 
13 
9 
7 
280 
1008 
96 
595 
276 
5733 
198 
403 
139 
171 
Reduction 
per cent. 
99.9 
99.9 
99.8 
99.6 
99.9 
99.9 
99.8 
99.7 
99.6 
99.7 
99.8 
99.3 
99.9 
99.2 
99.8 
97.5 
99.8 
99.6 
99.9 
99.9 
99.6 
'■sissssassssr -"'-•' 
After ■Three Freezings. 
Average. 
38 
23 
19 
29 
7 
5 
9 
7 
4 
1 
161 
356 
85 
354 
116 
458 
129 
269 
65 
75 
Reduction 
per cent. 
99.9 
99.9 
99.9 
99.8 
99.9 
99.9 
99.9 
99.8 
99.8 
99.9+ 
99.9 
99.8 
99.94- 
99.5 
99.9 
99.8 
99.9 
99.8 
99.9+ 
99.9 
99.8 
liours more ; refrozen April 12 and 
