160 BLBLIOGHAPHY 



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 Bates, Carlos G. and A. J. Henry. 1921. Stream flow at Wagon Wheel Gap, Colorado. 



Mon. Wea. Rev., vol. 49, December 1921 : 637-650. 

 and Raphael Zon. 1922. Research methods in the study of forest environment. 



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 Bauer, Franz. 1922. Periodic oscillations of annual temperatures in Germany. Mon. 



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 . 1925*. The 3 to 3£ year periodic pressure oscillation in the free atmosphere. Mon. 



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 . 1925. Date of channel trenching (arroyo cutting) in the arid southwest. Science, 



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 Burns, George P. 1920. Eccentric growth and the formation of redwood in the main stem 



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