Botany and Zoology. 407 
the current series, co mes to the conclusion that, cscs leaves des- 
titute of chlorophyll a not decompose any carbonic ea et that 
they begin to do so as soon as any chlorophyll is pr 9 
8 igi absolutely repeats to the decomposition “of carbonic 
acid in green foliage, and how much is necessary ?—These ques- 
tions are yustisthgtonlye shania by Boussingault, through a series 
of experiments in which a leaves were introduced into a mix- 
ture of carbonic acid and hydrogen, over mercury, and the evolu- 
tion of oxygen tested by the introduction of phosphorus, and its 
Beer oreecence in the dark, or by the white cloud in light. He 
Ss 
us found, 1, that leaves do no ose any carbonic acid in 
the dark, nor in twilight after sunset; but they do so very well 
peer oe sip oe light of a north sure, and under ordina 
decomposition 
owing ?—Prilli using light t of different colors but of equal 
ony teow ale colored sak thought he had ascertai 
irrespective of the nature of the rays; that the pang and yellow 
rays and those of that part of ws sah ia are most efficient merely 
because Ao they a Epon lumin But Dehérain, repeating these 
concludes that ge (tte and violet rays are not so effective as the 
yellow and red, when both are brought to the same intensity. 
‘Also that the same holds true of the evaporation of water from 
er vod denser uppers 
been ex 
The mo t of Protoplasm an citi with it, in the 
cells of begs on the other stat wh cae 0 hag fined ne i of 
r 4 
This is shown by Borodine (Acad. a ern who has seen 
remarkable movements of the chlorophyll-grains in terrestrial sal pease, 
especially in the leaves of nium, a Moss, Co confirming an 4 
covery of Famintzin, In diffused light the of chlorophyll 
are applied to the surfaces of the cells pa el to the arinon 0 
the leaf or other organ: under inn light they Rent is y move 
away to the side walls, to return again when the dimin- 
