CHEMISTItT. 811 



stantly stirring. A yellow powder is soon formed, and the heat is raided to red- 

 ness. Dissolve in (rater, precipitate oxide of load by carbonic acid or by sulpburet 

 of ammonium, evaporate, fuse, uud redissolve. 



ANTIMoNIAL VERMILION. 



Mathieu-Plessy has obtained a sulphide of antimony rivalling vermiiion in its 

 colour, by the action of a solution of hyposulphite of soda upon chloride of anti- 

 mony, aided by heat. 



SULPHATE OF SODA. 



Marguerite prepares this salt by heating sulphate of lead with chloride of sodium, 

 sulphate of soda and chloride of lead are formed, which latter is evaporated by the 

 heat and condensed in a cooling apparatus. On being triturated and kept suspended 

 in a solution of sulphate of magnesia or other soluble sulphate, it. is reconverted 

 into sulphate of lead ; this can tie effected with very iittle loss, and the original 

 quantity of sulphate can be made to convert a large amount of the chloride of 

 sodium. 



Processes are also described for obtaining caustic soda and its carbonate direotly 

 from common salt, and sulpuric acid from sulphite of lime and other sulphates ; 

 but the methods do not appear to be very availi 



CHEMICAL AFFINITY, 



Calvert has shown that sulphate of baryta is not so insoluble in nitric acid as was 

 supposed, its solubility being affected in a much higher degree by the bulk of the 

 acid than by its strength, and that its non-formation in a mixture is influenced not 

 only by the respective bulks of an acid of specific gravity 1.167, and the respec- 

 tive quality of sa!ts employed, but that the relative quantity of matter put in pret- 

 ence has a decided influence on chemical affinity. These observations are of consid- 

 erable importance as affecting quantitative determinations of baryta and sulphuric- 

 acid. 



L. I. tXJUM. 



Peiigot has obtained th:3 metal by act;. • hloride with sodium or 



aluminum ; ickel or iron in colour, acquires a yellowish tint from 



partial oxidation, burns brilliantly when heated, forming a black oxide, and pos- 

 sesses the remarkably high specific gravity of 18.4. 



SANGUINABINE. 



The princi] ned in the Sanguinaria Can di i been suppi 



be identical with Chelcrythrine obtained ! 

 has been proved by Dr. 



IATOTDIHE. 



Hoemntozine, the red colouring matter of 1 ! globules, i? uncrystallizable, 



but when blood is effused into the tissues of n:\ organism, microsco - are 



formed in from four to twenty days; these were called Hcematoidinc by Virchow in 

 1847. ('-?ee Lehman: ry anl Funke's supplementary platen, in publica- 



tions of Cavendish Society.) M. Robi •grammes'. ,nce 



in a crystalline form from a cyst of the liver. Its properties were investigated 

 and it's composition determined to be the same 88 Ho matozine, with the substitu- 

 tion of one equivalent of water for the one eq iron. 



