1816.) during the Year 1815. 39 
of acid, he pours a quantity of ammonia. ‘The palladium is imme- 
diately separated in the state of a triple salt. ‘The residual liquid 
being evaporated to dryness, and digested in alcohol, all the foreign 
salts are removed, and pure ammonio-muriate of rhodium. remains. 
Laugier obtained this salt in regular crystals by the following 
method. He dissolved it ina very little water. A yellowish matter 
consisting of foreign bodies remained undissolved. The liquid was 
again evaporated to dryness, and the dry mass digested in alcohol. 
These solutions, evaporations, and digestions, in alcohol, being re- 
peated a number of times, the liquid left to itself deposits regular 
crystals of ammonio-muriate. These crystals appear nearly black ; 
but by transmitted light they exhibit a garnet-red colour. They 
have the shape of equilateral four-sided prisms. When reduced to 
powder, they assume a beautiful red colour. 
3. Chlorates.—M. Vauquelin has published a description of the 
chlorates (Ann. de Chim. vol. xev. p. 96). Except the chlorate of 
potash, which has been long known, none of these bodies had been 
examined by any other chemist than Mr. Chenevix, who published a 
description of them a good many years ago in the Philosophical 
Transactions. 
(1.) Chlorate of Strontian.—It may be formed by saturating 
ehloric acid with carbonate of strontian. It has a sharp and some- 
what astringent taste. It is difficult to obtain it in crystals, because 
it is very soluble in water, and even deliquescent. On red-hot 
charcoal it melts, giving out a fine purple flame. 
(2) Chlorate of Ammonia.—It may be obtained by saturating 
ehloric acid with carbonate of ammonia. It crystallizes in fine 
needles. It seems to be volatile. Its taste is extremely sharp. It 
detonates on a hot body, like nitrate of ammonia, but at a lower 
temperature, and it gives out a red flame. When heated in close 
vessels, it is decomposed, and converted into chlorine gas, azotic 
gas, witha little oxygen gas, or oxide of azote. At the same time 
a little muriate of ammonia is formed. 
(3.) Chlorate of Soda.—It may be obtained by saturating chloric 
acid with carbonate of soda. It crystallizes in square plates, like 
the chlorate of potash ; but it is very soluble in water, yet not deli- 
quescent. Its taste is cooling, and somewhat sharp. On red-hot 
charcoal it fuses into globyles, giving out a yellow light. 
500 parts of carbonate of soda saturated with chloric acid pro- 
duced 1100 of crystallized chlorate. When distilled, it yielded a 
great deal of oxygen gas mixed with a little chlorine. The residuum 
of the distillation was distinctly alkaline, though it had not been 
strongly heated. 
(4) Chlorate of Barytes.—It crystallizes in rectangular four-sided 
prisms terminated by an oblique face. Its taste is sharp and harsh. 
It dissolves at the temperature of 50° in about four times its weight 
of water. It is insoluble in alcohol. Its aqueous solution, when 
pure, is neither precipitated by nitrat® of silver nor muriatic acid. 
When well dried and heated, it loses 39 per cent., which loss is 
ewing to the escape of oxygen. ‘The residue of this decomposition 
