Chemistry and Physics. 265 
that relating to the action of heat upon amylo-sulphate of lime. When 
amylo-sulphate of lime is submitted to dry distillation, carbonic and 
sulphurous acids are given off and two liquids are obtained differ. 
ing in volatility ; the more volatile boiled at 42° C., was colorless 
by repeated distillation ; its formula is CioH10, it is consequently 
identical with amylene obtained by Balard by the distillation of amylic 
alcohol with chlorid of e substance analyz however 
not absolutely pure, but contained a small quantity of some sulphur- 
ompound. ‘The less volatile liquid obtained did not possess a constant 
boiling point—the portion boiling between 165°-175° gave pretty 
nearly the formula of amylic ether, C1oH110, with which however 
its boiling point does not correspond. From the results of this inves- 
tigation the author infers that in the dry distillation of an amylo- 
sulphate one portion of the oxyd of amyl passes over as such, one 
; : ind ; 
simply to the passage of the element into an allotropic state or form. 
Precisely the same change was produced by exposing phosphorus for 
Some time to a temperature of 226° C.; the mass assumed a fine red 
color and became gradually less fluid, darker, and finally perfectly 
opaque. The precise temperature at which the change takes place 
Be 
or brownish black: when washed it becomes violet, recovering its 
_ ginal color when cold. Its density at 10° C. is 1964. Amorphous 
