The 



Pi ant World 



A Magazine of General Botany 



VOLUME 16 

 U M B E R 5 

 MAY 1913 



CONTAIN I NO 



II. Some Quantitative Researches on the Permeability of Plant Cells 



By W. J. V. Osterhout 129 



A Much Desired Oenothera 



By Bradley Moore Davis 14S 



Evaporation Conditions at Skokie Marsh 



By Earl E. Sherff 154 



Booka and Current Literature 161 



Notes and Comment 164 



PTTBLIBHBD UONTBLT 



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Entered as second-claaa matter March 9, 1912, at the post office at Baltimore, Maryland, under tba Aotot JuJy IS, 1S94 



