14 Mr. Smithson’s chemical Analysis 
effervescence, and yielded clear colourless glasses ; but which 
became opaque on cooling, if over saturated. Carbonate of soda 
had not any action on it. 
c. b8.o grs. of this calamine dissolved in dilute vitriolic acid 
with a brisk effervescence, and emitted 9.2 grs. of carbonic acid. 
The solution was white and turbid, and on standing deposited a 
white powder, which, collected on a small filter of gauze paper, 
and well edulcorated and let dry, weighed only 0.86 gr. This 
sediment, tried at the blowpipe, melted first into an opaque 
white matter, and then partially reduced into lead. It was there- 
fore, probably, a mixture of vitriol of lead and vitriol of lime. 
The filtered solution, gently exhaled to dryness, and kept over 
a spirit-lamp till the water of crystallization of the salt and all 
superfluous vitriolic acid were driven off, afforded 96.7 grs. of 
perfectly dry, or arid,* white salt. On re-solution in water, 
and crystallization, this saline matter proved to be wholly vitriol 
of zinc, excepting an inappretiable quantity of vitriol of lime in 
capillary crystals, due, without doubt, to a slight and accidental 
admixture of some portion of the calcareous fragments on which 
this calamine had been deposited. Pure martial prussiate of 
tartar, threw down a white precipitate from the solution of this 
salt. 
In another experiment, 20.0 grs. of this calamine afforded 
28.7 grs. of arid vitriol of zinc. 
d. 10 grs. of this calamine were dissolved in pure marine 
acid, with heat. On cooling, small capillary crystals of muriate 
of lead formed in the solution. This solution was precipitated 
* Dry, as opposed to wet or damp* which are only degrees of each other, merely 
implies free from mechanically admixed water. Arid, may be appropriated to express 
the state of being devoid of combined water. 
