27 
In the followino* three experiments the })ottles were tio-htly corked, 
so as to keep the infected bone dust moist. All the other conditions 
were the same as the three preceding experiments (Nos. 42, 43, and 44). 
It is remarkable that the plague bacillus lived so long u time in 
watery suspension on this material — one hundred and twenty-tive days. 
It is especially to be noted how long the organism lived at 37^' C., a 
temperature which in this work has almost universally i)rov(‘d fatal 
foi’ the organism, even when kept moist on various objects. 
No. 4o. — A gar Scspensiox ox Moist Hoxk Dost, 17° to 19° C. 
Time. 
Result. 
Remarks. 
1 (lav 
+ 
Kept moist. 
:l (lavs 
+ 
5 days 
+ 
7 (lavs 
+ 
13 days 
20 days 
+ 
30 days 
+ 
43 days 
+ 
Contaminated with a long rod. 
')2 days 
+ 
03 days ; 
+ 
74 days 
+ 
8H days 
+ 
9H days 
+ 
Failed to kill a mouse. 
108 days 
+ 
Almost dry. 
125 days 
+ 
Dry. 
134 days . . 
144 days 
, 
ConUiminated. 
No. 4 (). — Agar Suspension o.n Moist Bone Dust, 22° to 29° 0. 
Time. 
Result. 
Remarks. 
1 day 
+ 
Kept moist. 
3 days 
5 days 
+ 
7 day.s 
+ 
14 days 
4- 
31 days 
+ 
43 days 
+ 
Failed to kill a mouse. 
52 day. s 
+ 
Do. 
03 day.s 
+ 
Mould eontamination. 
76 days 
+ 
88 days 
+ 
The bone dust is still moist. 
108 days 
+ 
The hone <lust is now dry. 
125 days 
— 
