A FUMIGATOR FOR SMALL ORCHARD TREES.* 
-V. H. Lown. 
INTRODUCTION. 
The fumigator described herein was planned at the Station for 
use in a series of orchard fumigation experiments with hydrocy- 
anic acid gas. It has been carefully tested with such good results 
that a brief description in bulletin form seems desirable. This 
style of fumigator is intended for use with the smaller orchard 
trees, such as peach, pear, plum and quince. Trees larger than 
the dimensions of the fumigator can often be relied back suffi- 
ciently to go under it without injury. 
DESCRIPTION OF FUMIGATOR. 
CONSTRUCTION. 
A picture of the fumigator in position ready for use is shown 
at Plate XLVI.. The dimensions are 10x6x6 feet. The frame con- 
sists of well-seasoned pine strips three inches wide and seven- 
eighths inch thick, braced on three sides by double cross pieces of 
the same thickness and one and one-fourth inches wide, midway 
between the top and bottom, and short braces at the angles, as 
shown at Plate XLII. The base is made of four-inch strips and 
has but three sides, the fourth being omitted to avoid the neces- 
sity of lifting the fumigator over the top of the tree before 
putting it in place. To add to the rigidity of the base two strips 
three by seven-eighths inches extend from the rear strip to the 
*Reprint of Bulletin No. 181. 
1Since writing the bulletin the author has been told, by Prof. W. G 
Johnson, that he has designed and used a similar fumigator. 
