292 
Journal of Agricultural Research 
Vol. XIV, No. 8 
TEMPERATURE AND HUMIDITY CONTROL 
The question of automatically controlling the temperature and 
humidity is perplexing to the Experiment-Station worker whose funds 
Fio. a.—Graphs showing the effect of humidity upon the elasticity of the wool fiber. 
are limited. The humidity room operated by the writer is simple in 
its method of control and can be readily installed at a minimum cost. 
The room used is an inside one, 6 feet wide, 6 feet long, and 12 feet 
high. The walls are made of hollow 4-inch gypsum blocks plastered 
