14 



HYDROCYANIC-ACID GAS FUMIGATION IN CALIFORNIA. 



The number of strips in each section can now be readily calculated. The 21 strips 

 should be numbered on the diagram from left to right. Section A requires six strips 

 and 8.5 inches of the seventh. Similarly, section C requires six strips beginning at 

 the right (twenty-first to sixteenth, inclusive) and 8.5 inches of the fifteenth. Sec- 

 tion B requires the remaining 20 inches of strip No. 7. 20 inches of strip Xo. 15. and 

 seven entire widths, thus making the total of 21 strips required. 



The cutting of the cloth can be done without waste if the details of construction 

 are well planned. In the above tent seven strips 50 feet long (49 feet 10§ inches) 

 should first be cut out for section B. Strips Nos. 7 and 15 are next cut and the out- 

 side corners cut at an angle of 45 degrees, as indicated in the diagram. Each strip 

 for sections A and C is cut shorter by its own width outside at each end than the strip 



preceding it, Thus the 

 required lengths of the 

 side strips are found by 

 matching the inner edge 

 of the new one to the 

 outer edge of the one be- 

 fore it. It is desirable to 

 have the central section, 

 B, made up entirely of 

 full-length strips so that 

 the stress will not be 

 across seams. The stress 

 is so slight, compara- 

 tively, in the side sec- 

 tions A and C that this is 

 not an important point. 



Such is the con- 

 struction of a 50-foot 

 tent. The method of 

 constructing a tent 

 anY other size is 



E r 



Fig. 2. — Plan for construction of octagonal sheet tent 50 feet across, 

 showing lines used in constructing octagon: A, C, side sections; B, 

 central section of full-length strips; E, E, so-called "ends" of tent; 

 S, S, so-called "sides" of tent; E, R, reinforcements; 1-21, strips 

 of duck 29 1 inches -wide overlapped \ an inch at the seams. (From 

 Morrill.) 



of 



similar. Tents up to 

 45-foot size are con- 

 structed throughout 

 of either of the drills 

 or of 8-ounce duck. 

 Larger size tents should have the full length strips of 8-ounce duck, 

 while the shorter side strips, or " skirts, " as they are sometimes 

 called, are made of a light drill. The main strain and wear falls on 

 the middle, heavier and stouter, long strips; hence the use of the 

 lighter material for the "skirts" decreases the weight of the tent 

 without affecting its durability. The duck used in such tents should 

 be of the very tightest grade available, while the 6J-ounce or 7-ounce 

 special drill previously recommended is most suitable for the " skirts." 

 Amount of cloth required for different-sized tents. — It is very essential 

 in constructing tents to know the amount of cloth required for the 

 size which it is intended to make. The writer has calculated this for 

 the regular sizes and gives below the results. Calculations are based 



