LIGHT AND METABOLISM 



25 



Welsh. Proc. nat. Acad. Sci. (Wash.), 16, 

 386 (1930). 

 Quart. Rev. Biol., 13, 123 (1938). 

 Biol. Bull., 77, 119 (1939). 

 J. e.rp. ZooL, 86, 35 (1941). 

 Welsh and Osborn. J. com}). Neurol., 66, 



349 (1937). 

 Whitaker. Proc. Soc. e.vp. Biol. Med., 34, 

 329 (1936). 



Wigglesworth. Principles of Insect Physio- 

 logy, London, 5th Ed. (1953). 



Wilson, Woodard and Abplanalp. Biol. 

 Bull., Ill, 415 (1956). 



Witschi. Wilson Bull., 47, 177 (1935). 



Young. J. exp. Biol., 12, 254 (1935). 



Zoond and Eyre. Philos. Trans. B, 223, 

 27 (1934). 



