PLATE IV 

 Field stations for the collection of weather data at Rocky Ford, Colo., in 1913: 



Fig. I. — Weather shelter, anemometer, and rain gauge at edge of sugar-beet field. 



Fig. 2. — Weather shelter among beet plants, showing hygrothermograph and cog 

 psychrometer. 



Fig. 3. — Weather shelter of the local Weather Bureau station about 3 miles from 

 sugar-beet field. 



27469°— 16 5 



