CURRENT LITERATURE 393 
nts by Dandeno.* His most important conclusions are as fol- 
> Sale are absorbed in the same way. Certain plants (¢. ¢-, Thunber- 
ia) may be so arranged as to take up in this manner all the solutes 
sed growth. In the case of Justicia, plants whose leaves were 
a applied contained only 16.37 cee cent. of ash. 
3. Solutes diffuse outward fram leaf tissues when the surface of the 
wet with water. These may be resorbed as stated under 2. Guttation 
(tomato, Impatiens, Phaseolus, etc.) and dew drops upon leaves contain 
ts, mainly CaCO3. When evaporation is too rapid for complete ror 
» “ake place, incrustation results. Distilled water left in panos 5 ee 
leaves 
Solutions applied to the cut end of the petiole of a detached leaf are : : 
o and transmitted throughout the leaf. If they have a bad effect 
the leaf, this may be in one of two ways: (4) osmotically they may C 
sis and evident trans- 
water from the leaf cells, thus causing plasmoly: 
the affected parts through the presence of water in the intercel 
my nd affect the cells in a chemical way, in which ¢ seh onal : 
ung leaves, through the cut ends of the twig, or . 
8rown out. Water cannot be absorbed through mek 
hole. A rather copious literature is ¢ 
— being incompletely pee No 
