* 
‘tion of plants.”? Dr. Burgerstein’s papers make a most 
304 The Botanical Gazette. 
Some recent investigations on the evaporation of water 
from plants.+ , 
ALBERT F. WOODS. 
At the meeting of the American Association for the At 
vancement of Science in August, 1891, a paper was “7 
Prof. Bessey and myself on ‘‘Transpiration; or, the lose 
water from plants.” In that paper we gave in a very CO 
densed way the condition of this problem at that time 
We called particular attention to two papers by Dr. All 
Burgerstein, published in 1887 and 1889, and called “Mater: 
ials for a monograph relating to the phenomena of trample 
uable contribution to the literature of transpiration, ee, 
invaluable to one who desires to make a critical study of ft 
subject. Ay 
A pamphlet by Dr. Oscar Eberdt? is also a mastery 
sentation of the subject, and contains the record of many 
uable experiments. oe 
The Lavestipationd recently carried on by M. Henri Ju 
and published in the Revue générale de Botanique, eh 
forded us a clearer insight into the relation vener 
evaporation and assimilation. M. Jumelle pee sin 
of light, passing through the chlorophyll of a od 
used in assimilation and partly in chiorovep ‘oak 
supply of carbon dioxide is taken away eae sts 
similation is, of course, stopped, and more 0 vapor 
the absorbed light ray is left free to affect pert he 
In a series of experiments which I conduct of light 
nal temperature of plants, I found that a pe “fourths #4 
passing two parallel panes of clear glass t pee’ sf alu ® 
inch apart, filled between witha saturated 50 ton plant tise 
distilled water, had a remarkable calorific fe" al tem nena 
rich in chlorophyll, quickly raising the Ky ake light ( 
from 3° to 5°C. higher than the air. %! 
~ orsity of Nebrask® 
‘Read before the Botanical Seminar of the University : angen J © 
*Materialien zu einer Monographie betreffend de 1 Wien. | 
Piration der Pflanzen. Verh. K. K. Zool. Bot. angigkeit yon 
ie Transpiration der Pflanzen und ihre ‘ 
dingungen. Marburg 1889. 
4]. c. 1889, no. 1. 
+ 
