i8 
Mr. Smithson’s chemical Analysis 
Electrical Calamine. 
The Abb6 Hauy has considered this kind as differing from 
the other calamines only in the circumstance of being in distinct 
crystals; but it has already appeared, in the instance of the 
Derbyshire calamine, that all crystals of calamine are not electric 
by heat, and hence, that it is not merely to being in this state 
that this species owes the above quality. And the following expe- 
riments, on some crystals of electric calamine from Regbania in 
Hungary, can leave no doubt of its being a combination of calx 
of zinc with quartz ; since the quantity of quartz obtained, and 
the perfect regularity and transparency of these crystals, make 
it impossible to suppose it a foreign admixture in them. 
a. 23.45 grs. of these Regbania crystals, displaced 6.8 grs. of 
distilled water, from a stopple- bottle, at the temperature of 6 4* 
Fahrenheit; their specific gravity is therefore = 3.434. 
The form of these crystals is represented in the annexed 
Figure. 
ae = 150°. 
be = 115 0 . 
cd = 130°. 
They were not scratched by a pin ; a knife marked them. 
