New York AGRICULTURAL EXPERIMENT STATION. ie 
Cover.—In all cases unbleached sheeting was used for cover- 
ing the frames. In order to have 4s few seams as possible nine- 
quarter cloth was used on the twelve-foot and eight-quarter on 
the eleven-and-a-half foot fumigators. These widths required 
but one horizontal seam, which in most cases followed the 
middle rail; they also permitted of an over-lap on the top-rail. 
For allowing an over-lap on the stile of each door and a slack 
on two of the hinged angles, to prevent binding when closed, 
twenty-four-and-a-half and twenty-and-a-half yards in length 
of the above sizes were used for the sides of the two sizes of 
fumigators. 
Before attaching cover, all the stiles and top rails of the frame 
were faced with strips of Canton flannel. This not only 
strengthened the hinged angles and increased the packing sur- 
face for doors and top-joints, but also prevented wearing of the 
cover on the rough frame-work. 
By using three pieces of the sheeting, each a few inches longer 
and wider than the middle section of the top-frame, two top 
covers were made as follows: First, one piece was cut length- 
wise into two strips of equal width. Each strip was folded on 
itself and the ends sewed together after which it was cut across 
diagonally forming two triangles. These were sewed to the 
sides of one of the remaining rectangular pieces completing the 
cover. In a similar manner the other strip was made into two 
triangles, sewed to the third rectangular piece and formed a 
second cover. 
When complete the cover was first fastened to bottom rail of 
frame and then stretched to top rail and tacked. In each case 
allowance was made for folds on angles where necessary, and 
excessive horizontal stretching avoided. 
The only difficulty in attaching cover to top-frame was on the 
four angles of the sides. Here a gore had to be inserted to 
allow opening of the top. 
Two grades of sheeting were tested, “ Lockwood ” nine-quarter 
wide costing 15c, and “ Palma” eight-quarter wide at 17$c per 
yard. The latter had a firmer thread and was woven more 
