THE 



SCIENTIFIC PHOCEEDINGS 



OF TUE 



ROYAL DUBLIN SOCIETY. 



Vol. XIV. (I.S.), lo. 34. MARCH, 1915. 



OSMOTIC PEESSUEES IN PLANTS. 



V. — Seasonal Variations in the Concentration of the 

 Cell-Sap of some Deciduous and Evergreen 

 Trees. 



BY 



HENEY H. DIXON, Sc.D. (Duel.), F.E.S., 



UNIVERSITY PBOFESSOK OF BOTANY, TRINITY COLLEaE, DUBLIN j 

 AND 



W. E. G. ATKINS, Sc.D. (Duel.), F.LC, 



ASSISTANT TO THE UNIVEESITY PROFESSOK OF BOTANY, TRINITY COLLEGE, DUBLIN. 



[/I uthors alone are responsible for all opinions expressed in their Gommunications-I 



DUBLIN: 



PUBLISH P]D BY THE EOYAL DUBLIN SOCIETY, 



LEINSTER HOUSE, DUBLIN. 



WILLIAMS AND NORGATE, - 



U, HENRIETTA STREET, COVENT GARDEN, LONDON, W.C. 



1915. 



Price One Shi 



