1913] Shaw : Studies on Influences Affecting Protein Content of Wheat 105 



The originals showed the following composition 



Two rows of each of these varieties were drilled parallel into 

 a bed 24 feet long. In the spring after the grain began to make 

 an upright growth a series of lath screens was constructed and 

 placed across the plat so as to shut off different proportions of 

 the direct sunshine. The plat was thus divided into sections. 

 At Tulare sectional screens were arranged so that they excluded 

 three quarters, one half, and one quarter of the sunshine respect- 

 ively. One quarter was left unshaded, and this received the full 

 sunshine. In this manner one fourth of each variety received the 

 same amount of sunshine. At Davis a similar arrangement was 

 used, except that the amount of sunshine admitted was one third, 

 one half, two thirds, and full. These screens were left in place 

 until the grain was matured and harvested. Each portion of each 

 variety thus treated was harvested separately and taken to the 

 laboratory for analysis. The results are stated below : 



