358 



R. T. BINGHAM 





(A) 



(B) 



Figure 1. Inoculation chambers: (A) Earlier version, inner 

 walls and shading of canvas, covering 3,000 seedlings in one 

 run (Spokane, Washington, 1953); (B) Present version, inner 

 walls of 6-mil polyethylene film, shading of canvas, covering 

 75,000 seedlings in one run (Moscow, Idaho, 1966). 



