72 FUMIGATION METHODS 



for other purposes in orchards and farm work. In 

 some cases the sheets are used to cover fruit in wagons 

 as it is hauled to the station. The frames are put to- 

 gether with nails or screws, and are easily taken to 

 pieces and stored away for future use. This type of 

 f umigator is valuable for small trees and shrubs in or- 

 chards and on private grounds. The method of oper- 

 ating this type of fumigator is shown in Figs. 36 to 

 42, taken by the author expressly for this work. 



A box fumigator. A new style, much after the 

 old type of the Emory fumigator, has been designed by 

 Prof. V. H. Lowe, of the New York Experiment Sta- 

 tion. It is intended for use with the smaller orchard 

 trees, such as peach, pear, plum, and quince. A good 

 idea of the general construction of this apparatus can 

 'be gotten from a study of Fig. 43. The dimensions 

 are 10 x 6 x 6 feet. The frame consists of well-sea- 

 soned pine strips three inches wide and seven-eighths 

 inches thick, braced on three sides by double cross- 

 pieces of the same thickness and one and one-fourth 

 inches wide. The base is made of four-inch strips 

 and has but three sides, the fourth being omitted to 

 avoid the necessity of lifting the generator from the 

 top of the tree before putting it in place. The frame 

 is covered with eight-ounce ducking, such as described 

 for the Emory tents and other fumigators. The cloth 

 was oiled with boiled linseed oil, in which lampblack 

 was mixed to give it a dark color. To prevent trees 

 from penetrating the top of the fumigator a stout wire 

 netting was tacked on the inside of the upper half of 

 the frame. 



A strip of canvas one and one-half feet wide was 



