308 ‘On Sedalite. 
water, and treated with muriatic acid. The whole dissolved; 
except 25 grains of a white powder, whieb proved on ex- 
amination to be silica. The muriatie acid solution was 
mixed with sulphuric acid, evaporated to dryness ; the re- 
sidue, digested in hot water, and filtered,- to separate the 
sulphate of barytes. The liquid was now mixed with an 
excess of carbonate of ammonia, boiled for an instant or 
two, and then filtered, to separate the earth and iron pre- 
cipitated by the ammonia. The liquid was evaporated to 
dryness, and the dry mass obtained exposed to a red heat 
in a silver crucible. The residue was dissolved in water, 
and exposed in the open air to spontaneous evaporation. 
The whole gradually shot into regular crystals of sulphate 
of soda. This salt bemg exposed to a strong red heat, 
weighed 50 grains, indicating, according to Berthollet’s 
Jate analysis, 23°5 grains of pure soda. It deserves to be 
mentioned, that during this process the silver crucible was 
acted on, and a small portion of it was afterwards found 
among the sulphate of soda, This portion was separated 
before the sulphate of soda was weighed. 
The preceding analysis gives us the constituents of soda- 
lite as follows: * 
StHEA sd pleitrersiale We 6 Sid’ elaavaeidye ERG SR 
Wjunaina’ fee hivk abe hip tse! Wiha 
TARIC ae tis State HMR a8 wie Dale’, (ATED 
Gide OF, 170M) a6 Seisteel Maid [nie 
SOAS diese vininidls deme’ vedi > 12a ee 
Maamatic; acid).ty. -aiya' 6 ao. eee) Hid0O 
Molavileanatten}'(: So Lnkhieesle ie 
LOSS} efe/ nn) Usieleis oe is te 3 Geely ATO 
100°00 
Mr. Allan sent a specimen of this mineral to Mr. Eke- 
berg, who ahalysed it in the course of last summer. The 
constituents which he obtained, as he states them in a letter 
to Mr. Allan, are as follows: 
SUCH vies dice Veer) tore isienine Nae 
‘Alumina, wig sien en ood cea Tees 
SGGR-) cased ab viele Fodlolis tbr Mts 
Miuriatic acid): issu theater One 
Oxide ol iron: say we efed Hebi Oreh 
160°00 
This result does not differ much from mine. ‘The quan- 
tity of muriatic acid is much greater than mine. The lime 
and 
