685 
such treatment would be safe for human use by the mouth so far as 
tubercle bacilli are concerned. 
It is difficult, if not impossible, to briefly summarize the work of 
others upon the thermal death point of the tubercle bacillus in milk. 
The following table necesarily leaves out. many factors: 
Table showing the thermal death point of the tubercle bacillus as found by 
V a rio u s inv esti gator's. 
Investigator. 
KiUed at— 
Not killed at— 
Martin, 1882 
May. 1883 
Sormani, 1884 
Schill and Fisher, 1884 
Voelsch, 1887 
By cooking 
Bolling, 5 minutes 
80°. 
90° for 10 minutes, 
100°. 
100°, boiling twice. 
Yersin, 1888 : 
Bitter, 1890 
Bang, 1891 
Bonhoff, 1892 
Gancher and Ledeux-Lebard, 1892 . . 
[60°, 10 minutes (—spores) 
[60°, 10 minutes (+spores) 
68°, 20 minutes 
p0°, 5 minutes (enfeebles) 
60°, 5 minutes (sometimes en- 
feebles). 
80° (sometimes kills) 
[85° (always kills) 
60°, 20 minutes 
60°, 5 minutes (attenuates) 
70°, 1 minute (kills) 
50°, 60 minutes. 
Forster, 1892 
[60°, 6 hours 
[95°, momentary 
[•55°, 3 hours. 
60°, 45 minutes, 
[80°, momentary. 
DeMan, 1893 .., 
Scbroeder, 1894, 
Woodhead, 1895 
Marshall, 1899... 
Th. Smith, 1899.., 
Morgenroth, 1900 
[55°, 4 hours 
[60°. 1 hour 
60°, 15 minutes 
50°, 15 hours 
60°, 8 hours 
60°, 45 minutes 
70°, 45 minutes 
70°, minutes 
68°, 20 minutes 
60°, 15 to 20 minutes. 
55°, 3 hours 
>60°, 45 minutes. 
•90° (results contradictory). 
60°, 10 minutes. 
[70°, 10 minutes. 
[100°, momentary. 
50°, 4 hours.. 
100°, 3 hours 
Kobrak, 1900 
Beck, 1900... 
Galtier, 1900 
Russell and Hastings, 1900 . , 
Herr, 1901 
Hesse, 1901 
Levy and Bruns, 1901 
Berthcl and Stenstrom, 1901 
Bang, 1902 
Tjaden, 1903 
Rullmann, 1903 
Barthel and Stenstrom, 1904 
Russell and Hastings, 1904 
Zelenski, 1906 
Rosenau, 1907. 
60°, 20 minutes 
65°, 15 minutes 
60°, 20 minutes 
65°, 15 minutes 
85°, 1 to 2 minutes 
65°, 30 minutes 
80°, 1 minute (uncoagulated) — 
71°, 1 minute 
60°, 20 minutes 
[ 100 °. 
[80°, 30 minutes. 
85°, 6 minutes. 
80°, 5 seconds. 
70°, 15 minutes. 
60°, 15 minutes. 
60°, 20 minutes. 
80°, 1 minute (coagulated). 
76°, 20 minutes. 
