408 Scientific Intelligence. 
shed. This should be considered in connection with the observa- 
tions, recorded above, that blanched plants do not turn green so 
readily under direct as under diffused light. Rose, more recently, 
concludes, as did Mohl long ago, that these movements do not ori- 
ginate in ‘the grains of chlorophyll, but belong to the protoplasm 
in which they are imbedded. 
- Leaves Bec rissciete by artificial light also decompose meg 0 
acid, as illieux shows, Hacer by electrical, the Dru 
mond, sd even —_- Joe 
any considerably seta but only becomes available as it rises 
into the air and reaches e foliage. So unlikely a conclusion 
needs more decisive med ae the favorable action of car- 
bonie acid in respect to the solution of the mineral matters needed 
by the plant and ahaa md it, may be in some sort independent 
of its own absorptio 
Tater, Schultz-Schultzenstem, with 
e of the vessels’ of the latex an, 
_ nourishing fluid. ‘Treviranus led off in the o — opinion, which, 
drawing its strongest ab rutents from the tau 
are found in a Sieg erin small number of plants, an 
‘that wu largely con con ee a me! and the like, pronounces this 
to bea senetion and this view was 
“maintained ioe ee Mohl.. Trécul, “who has in these 
ozen year done 80 much excellent work in vegetable mrpre 
m late vessels,—and who discovered th 
