CHAPTER VI 

 BELL AND HOOP TENTS 



T|HE tents known as bell tents are cylindrical in 

 shape, with the top rounded over like a dome. 

 They are used in connection with a derrick, 

 by means of which they are placed upon and 

 lifted from trees; the derrick also supports the weight of 

 the tent while it is upon the tree. The bell tent was one 

 of the original forms of tents, and while mostly sup- 

 planted by other styles, is still used to a considerable 

 extent, especially for very large trees. It is the only 

 form of tent now in use where the whole weight of the 

 tent is not carried by the tree, and many favor it for 

 this reason.* 



The derrick used with the bell tents at the present 

 time is that used with the Preble fumigator, or some 

 modification of it. This is shown in Fig. 13. It con- 

 sists of a wagon, which supports a mast considerably 

 higher than the trees to be fumigated, and is braced at 

 the bottom with stays that hold it rigidly in place. 

 Across the top of the mast a yard is fastened and 

 braced with trusses extending from the mast. The 

 length of the yard is about a third longer than the 

 distance between the rows of trees. Near each end of 



* This description is taken from the excellent bulletin 

 (No. 122) by Prof. C. W. Woodworth, of the California 

 Experiment Station. 



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