18 
THE LENGTH OF TIME THE PEST BACILLUS WITHSTANDS DRYING. 
Author. 
Kitasato, 
Wilm 
Abel 
Ficker 
BatzarotF. 
Hankin 
German Plague Commis- 
sion. 
Germano, 
Giaxa and Gosio, 
Rosenau, 
Conditions. 
Resisted. 
Killed. 
Dried on cover glass slips at 28° to 30° C.. 
Dried on glass slips at 29° to 31° C 
Dried in vacuo 
Dried on various objects at 35° C 
Dried on various objects in vacuo over 
H 2 SO 4 at 20° C. 
Dried on cover slips from pus and 
culture at 16° to 20° C. 
Dried on threads, in linen, in tissue at 
1 to 36 hours.... 
43 ^ days 
14 days 
30 days 
4 days. 
After 43 ^ days. 
3 hours. 
2 to 4 days. 
3 to 4 days. 
After 14 days. 
16° to 20° C. 
Dried on piece of fresh skin, 16° to 20° C 
Dried on cover glasses in desiccator 
Dried and moistened alternately..... 
Dried splenic pulp, “ room tempera- 
ture.” 
Dried cultures mixed with infusorial 
earth. 
Dried on sheep’s wool, and gunny 
cloth and cotton. 
Dried on glass, filter paper, silk threads, 
pieces of silk and wool and linen, at 
30° to 32° C. exposed both in room 
and in desiccator. 
Dried on the same objects at 30° and 
32° C., and 22° to 24° C , infected with 
bacillus from plague organs. 
Dried and kept at 15° to 18° C 
In moist and dry room dust, 16° to 
10 days 
8 to 11 days 
20 to 36 hours.. 
28 days 
19 days 
7 days. 
8 days. 
28 days. 
20° C. 
Dried in fine sand and brick dust, 16° 
to 20° C. 
Dried in loam, tufa, and marl 
In moist sand, loam, tufa, marl, and 
brick dust at 16° to 20° C. 
On moist linen, wool, silk, and filter 
paper at 16° to 20° C. 
Dried on linen, 16° to 20° C 
Dried on wool, 16° to 20° C 
Dried on silk, 16° to 20° C 
Dried on filter paper 
Dried on linen and wool; agar cul- 
tures, pus and blood used. 10° to 
13° C. 
1 day. 
60 days. 
60 days. 
1 day 
30 days. 
4 days... 
4 days. 
30 days.. 
9 to 12 days. 
28 to 48 hours 
44 days. 
31 days. 
6 days. 
33 days, 
1 day. 
5 days. 
1 day. 
4 days. 
8 days. 
Dried on linen thread, 36° to 39° C 
Rabbit skin infected with plague-in- 
fected blood, 12° to 16° C. 
Dried on little balls of gelatin-albu- 
men, 20° to 23° C. 
Dried on little balls of gelatin-albu- 
men, 17° to 19° C. 
Dried on crash, 17° to 19° C. and 20 to 
23° C. 
4 days.., 
15 days. 
75 days. 
75 days. 
48 days. 
5 days. 
Dried on crash, 20° to 27° C 
Dried on paper, 20° to 27° C 
Dried on pine wood, 20° to 27° C, 
Dried on pine wood, 17° to 19° C, 
Dried on pine wood, 20° to 23° C, 
13 days, 
8 days.., 
4 days.. 
8 days.. 
11 days 
15 days. 
11 days. 
8 days. 
11 days. 
13 days. 
