398 Miscellaneous Intelligence. 



The next compound is the golden sulphuret of antimony ; the 

 methods of preparing which are well known. It is considered as 

 containing 5 proportionals of sulphur, and by calculation, there- 

 fore, is composed of — 



Antimony 61.59 



Sulphur 38.41 



The results of experimental analyses differed too little, it is 

 said, from the calculated results, to require that they should be 

 given. 



The native compound of sulphuret of antimony, with oxide of 

 antimony, was found to contain — 



Sulphuret of antimony . . 69.86 

 Oxide of antimony . . . 30.14 



or, according to M. Rose's views, 1 proportional of oxide of 

 antimony, with 3 proportionals of oxygen, and 2 proportionals of 

 sulphuret, with 3 proportionals each of sulphur. — Arm. de Chim. 

 xxix. 241. 



12. On the Detection of Arsenic by Lime Water. — The paper 

 from which the following extracts are made is by M. Aug. Ludw. 

 Giseke, and has been published in Schweigger's Journal. We 

 are induced to notice a part of it in consequence of the import- 

 ance which attaches to any circumstance affecting the indications 

 of arsenical tests. The following process for the detection of 

 arsenic in cases of poisoning, is the joint production of Rose and 

 Berzelius : — " Cut up the coats of the stomach, and place them in 

 the liquid, which is boiled with a few drachms of caustic-potash, in 

 order to'dissolve any arsenious acid that might be contained in it. 

 The solution obtained is filtered, heated till it boils, and during 

 the boiling mixed with nitric acid, which is added in small portions 

 as long as any thing separates, and till the liquid has become 

 strongly acid, clear, and of a bright yellow colour ; it is filtered 

 while hot ; afterwards nearly, not completely, saturated with 

 carbonate of potash, and made to boil, in order to expel the car- 

 bonic acid ; then it is boiled with clear lime-water as long as any 

 precipitate is formed ; the lime-water first saturates the excess of 

 acid, and then precipitates with the arsenious acid as arsenite of 

 lime, and with the phosphoric acid and other animal substances 

 decomposed in the nitric acid. If, instead of saturating the 

 acid with lime-water, you add first caustic alkali till the liquid 

 becomes alkaline and then add lime-water, no precipitate will be 

 formed, because the arsenite of lime is held in solution by the alkali ." 



This statement of the solubility of arsenite of lime in a solution 

 of alkali, being in contradiction with certain facts, M. Schweigger 

 was induced to examine the circumstances more minutely, and 



