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POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



determines in large part how the tent will hang. Over and over again 

 we have seen rows of trees appearing to the eye of any observer almost 

 identical in size and form, that showed differences of hundreds and hundreds 

 of cubic feet when the tents were thrown. The trees in Figures 101 and 102 

 looked almost perfectly uniform before being tented, though afterwards wide 

 variations were very evident, and these tents were "fired" in just the shape 

 shown in these photographs, the dosages of a necessity most uncertain by any 

 method. 



A great deal may be done to overcome the very uncertain element in- 

 troduced by the unsymmetrical form of trees, by careful attention to pulling 



Figure 104. This tree would be hard to tent, even iwith an unring'ed canvas 



the tent into some shape after being thrown. A little pulling will often entirely 

 correct the form of the top, while a little attention to gathering the slack in 

 around the base may save hundreds of cubic feet. It is far more difficult 

 to do good work with tents attached to rings as may be readily seen by an 

 examination of Figures 103 and 104. In the smaller trees wasted space and 

 variation in form may be even more evident than in the larger trees (Figure 

 105). It thus becomes very certain that in careless hands the marked tents 

 may give as variable results as the old guess-work, whereas in careful hands, 

 marked tents make possible a far more accurate dosing. 

 The foregoing facts seem to make it very evident that : 

 1. Trees should never be estimated until tents are on them. 



