11 
i f 
4 ' 
Xo. 7. 
; ' Two cubic centimeters on absorbent cotton, edge of blanket, twenty- 
' four hours. 
Two cubic centimeters formalin ou a strip of absorbent cotton placed 
along the edge of a blanket at one end of box 15 by 15 by 15 inches. 
Moist cultures at a distance of 8 inches between layers of the same 
blanket. Box opened in twenty-four hours. 
Layers of blankets. 
Typhoid. 
Diph- 
theria. 
] 
O 
3 
1 
4 
4 - 
Controls 
Xo. 8. 
Three cubic centimeters on strip of absorbent cotton, edge of blanket, 
twenty- four hours. 
Three cubic centimeters formalin on a strip of absorbent cotton placed 
along the edge of a blanket at one end of box, 3 feet 4 inches by 1 foot 
9 inches by 1 foot 9 inches. 
Fresh moist cultures placed at distances of 8 inches, 12 inches, 18 
inches, and 24 inches^ between layers of the same blanket. 
Box opened after twenty-four hours exposure. 
1 
1 
Layers 
of 
blankets. 
Inches — 
1 
8 
12 
18 
1 
24 
Typhoid 
1 
+ 
+ 
-1- 
I 
+ 
Diphtheria 
1 
-r 
-1- 
-1- 
-i- 
Typhoid 
2 
-t- 
+ 
+ 
-1- 
Diphtheria 
2 
-1- 
+ 
+ 
-h 
; Typhoid 
3 
-f- 
-f 
+ 
+ 
Diphtheria 
3 
-h 
-f 
+ 
-1- 
Typhoid 
4 
+ 
-f 
-f 
+ 
. Diphtheria 
4 
+ 
-f- 
-f 
+ 
Controls 
-f- 
+ 
+ 
+ 
Xo. 9. 
Four cubic centimeters i^oured along the edge of sheet, twenty- four 
hours. 
Four cubic centimeters formalin poured from a pipette on the edge 
of a sheet at bottom of box 15 by 15 by 15 inches, and fresh moist cul- 
