OSMOTIC PRESSURES AND ELECTRICAL CONDUCTIVITIES 165 



JAN FEB. MAR. APRIL MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC. 



V 





V-, 





e'9'3 



1913 



SYRINGA VULGARIS. Leaves 

 FIG. 20. 



The unbroken curves show the depressions of freezing-point and osmotic 

 pressures produced by the total solutes (A), carbohydrates (A A e ), 

 and electrolytes (A e ) of leaves of a deciduous tree treated with 

 liquid air. These were gathered in 1913. The dotted line shows 

 the values of A for untreated leaves gathered in 1911. 



