464 Scientific Intelligence. 
would call particular attention to it, in the hope of further obser- 
vations and independent confirmation. We are told that the blade 
incurves from apex to base, in the manner of its vernation. What 
higher Cryptogamia as well, and now also in Phanerogamous 
plants, both aquatic and terrestrial. The paper in Bull. Acad. St. 
etersb. vol. 13, 1869, is reproduced. in the Ann. Sci. Nat., ser. 5, 
% 33; mna, Ceratophyllum and Callitriche are among the 
aquatic plants in which the phenomenon has been observed, and 
Stellaria media among terrestrial. Lemna trisulea isone of the 
best plants for these observations. Under diffuse day-light the 
grains of chlorophyll are distributed over the cell-walls parallel 
to the surface of the leaf or frond. Under the direct light of the 
po i 
became grouped in clusters. In darkness the chlorophyll is like- 
is . Thus absence of light produces 
essentially the same effect as direct sunshine, but less strikingly. 
ther these changes are passive and caused by movements of 
the colorless protoplasm, as Sachs supposes, or active, is not made 
ut. But the movements, according to Borodin, are in response 
only to the more refrangible rays. aa 
7. Dehérain: Evaporation ‘of Water and decomposition of 
Carbonic acid by foliage-—Some notice of Dehérain’s papers, 
abstract published last summer in the AR, Sci. Nat. (ser. 5, tome 
2). and least expected results, 
which came to light early in the investigation, and simplified the 
experiments considerabl as :— 
—- ter fr young leav q 
_(4.) And is mainly caused by the luminous rays (yellow and re ). 
(5.) The difference in this respect is manifest even when the ar 
refrangible and more refrangible rays are brought to an eq 
y: en 
aporation of water is much more copious from oe oe 
from the lower face of the leaf, This result, in seas 
