PLATE 84 
Character of arsenical injury. 
A.—Branch treated with a solution of arsenic acid. The portion photographed was 
inclosed by the bandage. Bark removed for photograph. The knot in the dark, 
injured streak was made by cutting off a limb just before the solution was applied. 
The other knots shown in the figure were old and showed no arsenical injury. X 1. 
B to I .—Portions of tree injured by a single treatment with sodium-arsenite solution. 
There were two fresh wounds under the bandage on opposite sides of the limb. 
B. —Cross section of main limb 1 foot below intersection with treated branch. 
C. —Cross section 16 inches below bandage and just above main limb. X 1. 
D. —Cross section under bandage just below wounds. X 1. 
E. —Cross section 1 foot above bandage. X 1. 
F. —Surface view 8 to n inches below bandage. X 1. 
G and H.—Cross sections of side branch that joined treated branch 8 inches 
below bandage. The wound made by its removal is shown in figure F. 
Figure G is 1 inch and figure H is 6 inches above the intersection with the 
treated branch. X 1. 
I.—Main limb with treated branch removed. The wound made by its removal 
is shown near the left end of the figure. X X* 
