370 INFLUENCE OF LIGHT AND RADIANT HEAT ON TRANSPIRATION. 
= after removing the glass, I pass my hand under the blotting- 
and turn it over with a curved movement, so as = nee the 
e 
paper with very dilute gum-water Page with a small camel’s per 
operation when the first coating is quite dry. After this the spores 
remain perfectly secure, and retain their colours for years. This 
answers as well for Polyporet as for Agaricini—in the former case the 
es and forms of the spores, and in the latter those of the gills, being 
shown on the paper.— A. LtsTER. 
Extracts and Abstrarts. 
InFLuENcE or Lieut anD Raprant Hear on TRANSPIRATION. 
Untersuchungen iiber den Einfluss des Lichts und der arakiontes vwe 
auf die Von Dr. Jurivs W: 
(Sitzb. der K. Acad. d. Wiss. 1876. Translated in Ann. "i 
Se. Nat., 1877, p. 145.) 
Davzeny, who worked at the question of the relation between trans- 
piration and the different rays of the spectrum, did not come to any 
definite conclusion about such a relation ; but recently Déherain has 
found that the luminous rays exert the greatest effect, and thinks that 
inside the plant. cited the results of some ex perineal 
which tear out his view. 
ton during alternations of light and obscu- 
rity —When a plant is transferred from obscurity scan t, — 
tion is at first more active, but it gradually diminishes, external con- 
ditions Aerts same, and finally becomes shicheniaah The sam 
th amount, is observed when the etary is 
light, Thus a plant of Hartwegia comosa 
