1923] Density of the Cell Sap of Plants 69 



above should not be expected, chiefly because of the fact that the entire 

 state lies in a humid region. However, notwithstanding the warning 

 of the sages that speculation is dangerous, even here the writer would 

 expect to find notable differences between typical habitats, as, for 

 example, between the hot pine lands and the cool spruce-fir forests 

 which are often enveloped in dense fog. Likewise, at intermediate 

 elevations in the mountains rather striking contrasts should also be 

 expected between the sap densities of species indigenous to the dry 

 slopes and ridges and those of the moist slopes and coves. 



ASHEVILLE, N. C. 



