Chemistry and Physics. 215 
otherwise it may be broken by the rapid formation of the hydrate. 
In any case, the process enables the chemist to prepare, in a few 
hours, several liters of absolute aleohol.— Ann. der Chemie und 
Ww 
previously saturated with chlorine. The bulbs were so place 
that each could be illuminated, by a definite portion of the spec- 
trum. Their distance from the prism varied from 1 to 2 me 
observed. When A was placed in the blue, violet, or ultra-violet, 
and B was dark, the expansion amounted, as a maximum, to 7°". 
Corresponding results were obtained by aie the relative 
i e 
ere to the chemical rays, as all bodies do when exposed to heat. 
* 
verted into heat, and thus cause expansion. 
consider them as exerting no heating effect. i 
The author considers the first of these views as most probable, 
and promises a further investigation of the subject.—Pogg. oti 
bes x . * : 
n the Ammonia-platinum Bases.—Cixve has communi- 
