6 



BULLETIN 4D4, V. S. DEPARTMENT OF AGRICULTURE. 



scribed about 10 per cent per hour in the range from 70 to 00 per cent 

 of relative humidity. In a condition below 50 per cent of relative 

 humidity tin* humidifier arts more quickly, -while at about 90 per cent 

 it works very slowly: in fact, it has been impossible in these experi- 

 ments to raise the humidity in the curing rooms during very dry 

 days much above 95 inn- cent with this apparatus. 



CONSTRUCTION OF THE HUMIDIFIER. 



The illustrations of the humidifier (figs. 1 and 2) show its general 

 arrangement and its position on a truck, whereby it can be moved 

 from place to place when needed. The detailed structure of the 



humidifier is shown 

 in figures 3, 4, 5, G, 

 and 7. The upper 

 pan (1) is 36 inches 

 long, 24 inches wide, 

 and 6 inches deep. 

 The lower pan (2) is 

 of the same dimen- 

 sions. The side (4) 

 of the cloth chamber 

 (3), which is open at 

 both ends, is 36 inches 

 long and 20 inches 

 high, connecting the 

 upper and lower 

 pans. The raised slots 

 (5) are 4 inches high 

 and extend to within 

 half an inch of either 

 end of the upper pan, 

 so that they are held 

 firmly in p o s i t i o n. 

 The upper ends of 

 the raised slots are 

 spread slightly, so as to allow the easy passage of the strips of 

 cloth (0). The pans, sides, and other metal parts are made of 

 galvanized steel of medium weight. The corners of the cloth 

 chamber are strengthened, with angle iron. The upper edges of the 

 strips of Russian crash are drawn through the raised slots and 

 allowed to drop down into the water in the upper pan, as shown 

 in figure 7 at 7. The bottom edges of the cloths are bound with 

 strips of sheet metal (8), so as to hold them in place. These bound 

 edges of the cloth strips are held in the lower pan by means of spring 

 clips or clamps (9) which are soldered to the bottom of the lower pan. 

 The strips of cloth are 35 inches wide, so as to fit the raised slots, 



Pig. -J. 



P1706IHP 



-Hear view of the humidifier, showing the arrange 

 ment of the electric fan in the hood. 



