FORMALIN SPRINKLED ON BLANKET. — TIME OF EXPOSURE, TWO TO 
FIVE DAYS. 
f- No. 42. 
If 
.. 
One and three-tenths cubic centimeters formalin per square foot. 
Cultures between layers of blankets, seventy-two hours. 
Two cubic centimeters formalin sprinkled on a blanket at the bottom 
of a box 15 by 15 by 15 inches. Slips of filter paper, moist and freshly 
prepared from bouillon cultures, were placed between layers of dry 
blankets, seventy-two hours’ exposure. 
Layers of blankets. 
Typhoid 
Anthrax 
spores. 
Diph- 
theria. 
0. 

(o)-f 

4 
— 
+ 
6 
— 
“T 
8 
+ 
+ 
Controls 
+ 
+ 
T 
(a) Light growth and retarded. 
No. 43. 
One and three-tenths cubic centimeters formalin per square foot. 
^ Cultures between layers of blankets, ninetj’ hours. 
I Two cubic centimeters formalin ^sprinkled on a blanket at the bottom 
! *of a box 15 by 15 by' 15 inches. 
I Slips of filter paper moist and freshly prepared from bouillon cul- 
! tures were, placed between layers of dry blankets, ninety hours’ ex- 
i posure. 
Layers of blankets. 
Typhoid. 
Anthrax 
spores. 
Diph- 
theria. 
o 
_ 
4 
— 
-f- 
+ 
6 
— 
-t- 
+ I 
8 
— 
-1- 
+ 
Controls 
4- 
-r- 
-h 
Experiments Nos. 42 and 46 plainly show that small amounts of for- 
malin sprinkled on blankets and exposed seventy-two and ninety hours 
do not kill anthrax spores through 2 layers of blanket nor diphtheria 
through 4 layers. 
Larger amounts of formalin were next used. 
