496 
SEDGWICK AND WINSLOW 
BACILLUS OF TYPHOID FEVER. 
Race C. 
Series II. 
Race C. 
Series III. 
Niimbor 
of Tube. 
51 
52 
53 
54 
55 
56 
57 
58 
59 
60 
71 
72 
73 
74 
75 
76 
77 
78 
79 
80 
Average Number Bacteria per c.c. 
Unfrozen Water 
1920 
2G75 
2200 
2510 
20G5 
1605 
1G85 
835 
460 
1820 
6580 
7700 
2485 
6440 
5145 
4130 
3920 
3080 
3535 
510 
Thawed Ice. 
2 
2 
1 
3 
33 
10 
1 
13 
15 
Reduction 
per cent. 
99.9 
99.9 
99.9+ 
99.9 
98.4 
99.4 
99.1 
98.4 
96.7 

10 
1 
1 
3 
1 
1 
4 


100.0 
99.9 
99.9+ 
99.9+ 
99.9 
99.9+ 
99.9+ 
99.9 
100.0 
100.0 
Average qq 5 
*l.?iv^'^^^'^*'' oT'^''? January 23, 1899, in 1^ hours; 
tl.awo,]^ January 30, after 1 week. Minimal temperature, 
Tubes 71-80, frozen January 25, 1809, in ll hoiir'^ • 
tl.awe,y ebruary 1, after 1 .eek. MininJd ten'^,erature; 
Race C. 
Series IV. 
Number 
of Tube. 
61 
62 
63 
64 
65 
66 
67 
68 
69 
70 
81 
82 
83 
84 
85 
86 
87 
88 
89 
90 
Average N umber Bacteria per c.c. 
Unfrozen Water. 
3335 
3520 
195 
885 
235 
215 
2105 
555 
40 
500 
1855 
1830 
260 
935 
110 
3595 
4480 
315 
50 

6 
25 
10 
55 
25 
60 
10 
20 
20 
15 
85 
20 
55 
35 
95 
30 
35 
70 
40 
40 
Reduction 
per cent. 
A verage 
99.9 
99.3 
94.9 
93.8 
89.4 
72.1 
99.5 
96.4 
50.0 
97.0 
95.4 
98.9 
78.8 
96.3 
13.6 
99.2 
99.2 
77.8 
20.0 
Tubes 61-70, frozen January 24 1899 in 
tliawcil January 25, after 2A kmL lir: ' , 
H 
V20 C.). 
TiiIh 
, hours; 
al temperature. 
l.ihos 81-90, frozen January 26 180D in 
hawed January 27, nftcr ^4 A.ur.. MiniSiT. 
(-13° C.J. 
Minimal ten 
U ho 
urs ; 
il>erature. 
Number 
of Tube. 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
41 
42 
43 
44 
45 
46 
47 
48 
49 
50 
Average Number Bacteria per c.c 
Uiifrozeu Water. 
167G5 
17220 
14315 
900 
18270 
9170 
6930 
7385 
2925 
9555 
83475 
S3100 
64890 
6G570 
11200 
21350 
2030 
700 
185 
1625 
Thawed Ice. 
9 

2 
2 
3 
1 
F 



1 
6 
5 
2 
4 
1 
23 
3 
1 
Reduction 
per cent. 
99.9 
100.0 
99.9+ 
99.8 
99.9+ 
99.9+ 
100.0 
100.0 
100.0 
99.9+ 
99.9+ 
99.9+ 
99.9+ 
99.9+ 
99.9+ 
99.9 
99.9 
99.9 
98.9 
99.9 
Average 99.9 
Tubes 11-20, frozen January 17, 1899, in IJ hours; 
thawed January 20, after 3 dai/s. Minimal temperature, 
(-13° C). 
Tubes 41-50, frozen January 20, in 2 liours; tbawcd 
January 23, after 3 da//s. Minimal temperature, (-10° C. )• 
Race C. 
Series V. 
Number 
of Tube. 
Average Number Bacteria jier c.c 
91 
92 
93 
94 
95 
96 
97 
98 
99 
100 
111 
112 
113 
114 
115 
116 
117 
118 
119 
120 
Unfrozen Water 
10710 
7280 
9555 
4645 
7735 
1570 
1325 
Thawed Ice. 
20 
75 
90 
5 
35 
355 
20 
Reduction 
per cent. 
6440 
13090 
143610 
234360 
105525 
41265 
11655 
36855 
27195 
1 1 9070 
45360 
15855 
500 
10 
5 
105 
10 
135 
5 
20 
40 
50 
5 
9.9. 8 
99.0 
99.1 
99.9 
99.5 
77.4 
98.5 
90.8 
99.9 
99.9+ 
99.9+ 
99.9+ 
99.7 
99.9+ 
99.9 
90.9 
99.9+ 
99.9+ 
Ave 
rage 
98.0 
^ ■ ■ I ^ . . . .. _ I ^M I ■ •• I ^~"^^^^^"" 
Tubes 91-100, frozen January 27, 1899, in 2 hours; 
thawed January 28, after 15 hours. Minimal teniptraturc, 
(-14° C). 
Tubes 111-120, frozen February 3. 1899, in 2 hours; 
thawed February i, after 15 hours. Minimal temperature, 
(-15°C.). 
