26 



HYDBOCYANIC-ACID GAS FUMIGATION IN CALIFORNIA. 



width of the tree, which frequently makes tent pulling much easier 

 than when the poles are more broadly separated. The tent should 

 always be moved in the direction of the strips of cloth so as to prevent 

 pulling the seams apart. 



The" successive stages in the covering of a tree are shown in Plate 

 V. In brief, thev are as follows: When the tops of the two poles 

 have been attached to the edge of the tent the width of the tree 

 distant from each other, the bottoms are placed at the sides of the 

 tree opposite the trunk, as shown in Plate V, figure 1 . Each tent- 

 puller then places one foot 

 on the end of his pole to pre- 

 vent it from slipping and 

 pulls on the guy-rope, thus 

 raising the upper end of 

 the pole and the tent (see 

 Plate V, fig. 2). When 

 erected to such an angle 

 that the poles no longer 

 slip, the puller removes his 

 foot from the bottom and 

 runs away from the pole so 

 as to secure a greater lever- 

 age on the rope (see Plate 

 V, fig. 3). The direction 

 of the pulling should be 

 not only forward but also 

 somewhat to the side so 

 as to keep the tent taut 

 between the ends of the 

 poles and thus prevent it 

 from being caught in the 

 top of the tree by sagging. 

 After covering the tree the 

 edges should be kicked in- 

 ward so that the tent hangs straight from the tree to the ground, 

 thus preventing unnecessary space underneath and making the tent 

 lie close to the soil. 



The removal of tents from one tree onto another is done directly 

 without first having to pull them off onto the ground. In fact, it is 

 easier to draw a tent off of one tree onto another than to raise it from 

 the ground onto the tree. Attach the poles to the edge of the tent 

 as previously explained. The poles can then be laid flat on the 

 ground, as in Plate VI, figure la, or the end with the tent attached 

 raised up and leaned against the tented tree, as shown in Plate VI, 



Fig. 6 —Carboy -with handles attached to facilitate pour- 

 ing the acid and carrying the carboy. (Author's illus- 

 tration.) 



