Analyses of the Chrysoberyls from Haddam and Brazil. 105 
this, a bunch of iron wire will burn, as if ignited in oxygen 
gas, and will fall down in the form of fused globules in the 
state of proto-sulphuret. Hydrate of potash, exposed to 
the jet, fuses into a sulphuret of a fine red color. 
An easy mode of impregnating Water with Iron. 
f a few pieces of silver coin be alternated with pieces 
of sheet iron, on placing the pile in water, it soon acquires 
a chalybeate taste, and a yellowish hue, and in 24 hours, 
ocks of oxide of iron appear. Hence by replenishing 
with water, a vessel, in which sucha pile is placed, after 
each draught, we may have a competent substitute for a 
chalybeate spring. 
lean copper plates, alternating with iron, would an- 
swer; or a clean copper wire entwined on an iron rod; 
but as the copper when oxidated yields an oxide, it is safer 
to empioy silver. 
Art. VI.—Analyses of the Chrysoberyls from Haddam and 
Brazil. By Henry Seyvert.* Read 5th March, 1824. 
In the summer of 1823, I visited Haddam, in the state 
of Connecticut. Among the various substances there 
collected, was the Chrysoberyl, a mineral much esteeme 
on account of its rarity. It occurs disseminated in a 
coarse grained granite, in which the predominant ingredi- 
bite.t It is also associated with greyish quartz, mangane- 
sian garnet of a fine blood red color, and a yellow granu- 
lar substance, which some mineralogists supposed to be a 
* This paper will appear in a volume of the transactions of the Ameri- 
can Philosophical Society, now in the course of publication at Philadel- 
phia. In the mean time it has been, by permission, transmitted by the au- 
thor, for insertion in this Journal. 
¥ Essai de’ ? Emploi da Chalumeau, p. 243. 
Vou. nt) 14 
