Screening and Destruction 203 



teen-mesh gauze used on the Canal Zone is negli- 

 gible. The best proof that screening does not 

 materially interfere with the comforts of the house 

 occupants is the fact that not a single complaint 

 has ever been heard on that score from the people 

 on the Zone. 



It was occasionally necessary to use tents and 

 railway cars for quarters. The method of making 

 tents mosquito-proof was as follows: A matched 

 lumber floor is laid, and on this are built up the 

 sides of a framework of two by fours, with the 

 necessary doors. These frames are screened. The 

 ridge pole is formed by two vertical two by fours, 

 and one horizontal member, properly braced. 

 Brackets of the right length and height are fas- 

 tened to the wall frames at intervals. The tent is 

 fastened to these brackets by pulling it tightly over 

 the upper horizontal members of the wall frames, 

 and fastening it to the members by clamping 

 strips of wood to form mosquito-proof joints. 

 Over the tent roof a fly is drawn, and its edges 

 fastened near the ends of the brackets to leave a 

 space of at least fifteen inches between the tent 

 and the fly edges. 



In the railroad construction camps, screened 

 cars are used. The cars are screened in the same 

 manner as the dwellings. The illustration shows 



