16 



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4 i it long sewc 1 to the tent in the form of a right angle as sh 



in figure 7, page 2 As fumigation tents should be pulled onto or off 

 the trees in the direction in which the strips of cloth run. the rings 

 should be so placed as to make this method of manipular: in 

 ssible. This is accomplished by having two rings at either end of 

 the tent and apart by about the width of the average-size tree treated. 

 They -liould be placed from S t 5 feet back from the edge, the dis- 

 tance depending on the size of the tent. A small link of chain 

 called a "'jingler" is usually attached to the ring, the sole pur] ise 

 of which is f lirect the operator to its location. By merely giving 

 the sheet a shake this simple device enables the tent pullers : : 



easily locate the rings on the darkest nights. 

 Such a great -:rain is localized at the place 

 where the rings :hed that it is well 



tc have this part reenforced by stitching 

 on an extra thickness of cloth. The same 

 material of which the tent i- instructed 

 is very suitable. The strip used should be 3 

 or 4 feet long. 



1 Jiiginally the bell, or hoop, tent was the 

 kind in use in California, and even now it en- 

 joys a li m ited use in some countries. This 

 tent is dome shaped, having the mouth held 

 d a circle of f-inch gas pipe. It is 

 suited only for covering small trees. Plate I 

 illustrates the character of this tent and the 

 method of its manipulation. Experiments in 

 California have resulted in the disuse of bell 



books to tent when covering 



Ttt; — ::i ;.. 1 ;;' :-::;;>;: ; 



"'urliT :: ::Ji-: ?;.::." ^ :':- 

 jeet: b. stoat cord for attach- 

 ing ring; e, eaten ring; d . nook 



:•- Z -~7 ''-'-'- : ^ : ■ ~-'-Z '--^ 



tents in favor of sheet tents, the latter style 

 )eing not only easiei . : nstruction and manipulation, but als 

 more easily kept in repair. 



-.-_- -: : j: 



The treatment of covers with various substances to increase their 

 :_ ss - been in practice to a gre r less extent since the 



jinning of fumigation. Linseed oil was one of the first tried. 

 It renders the tents perfectly tight but greatly increases their weight. 

 Experience has proved that tents so treated are liable to burning and 

 rotting under the conditions to which they are subjected in the field. 

 Treating tents with the mucilaginous concoction resulting from 

 soaking the common cactus Opuntia engtJmanrd) in water for 



• four - r as practiced - me extent during the nine 



Numerous other methods have been tried, such as painting with a 

 flexible paint: treating with glue dissolved in water: treating with 





