1914] 



OTIS— TRANSPIRATION OF WATER PLANTS 



491 



3. Wind is undoubtedly an important factor in plant transpira- 

 tion, at least up to a certain point, that is, to a point at which the 



CHART 



30 31 



August 



19 20 X 23 



2912. 



wind is strong enough to carry away the moisture as fast as it forms 

 on the surfaces of the plants. It is doubtful, however, if transpira- 

 tion is materially increased with winds in excess of this amount. 



