Schultz-Sellack

H. Rose says powdered potassium nitrate copiously absorbs the vapours of anhydrous sulphuric acid, H2SO4, to form a pasty mass and, according to C. Schultz-Sellack, potassium nitrate unites with liquid sulphur dioxide, forming a mixture or compound of the alkali nitrite and sulphate. 

J. Kerr found phosphorus to have a positive double refraction in the electric field. K. Schultz-Sellack showed that an 8-mm. layer of a soln. of 10 parts of phosphorus in one of carbon disulphide absorbs 52 per cent, of the rays emitted from a lampblack surface at 100° and 57 per cent, of the heat rays from a coal-gas flame. 

Antimony Sulphate.- -This is obtained by dissolving the metal or the oxide in concentrated sulphuric acid. On cooling, the sulphate crystallises out in long needles. Its specific gravity = 3-6246 and it is very hygroscopic Schultz-Sellack, Metd). When water is added to it, the hydi-ate, Sb2(S0 )3.2JH.20, is formed. When heated in air, it changes to the trioxide and the tetroxide, with the evolution of SO3. 

Wild found that thermoelectric currents are produced at the contacts of solutions in the tubes at different temperatures, and the thermoelectric forces are stronger than the liquid contact potentials. He used the same solution (e.g. CUSO4) in the lower parts of both tubes, and the same solution (e.g. ZnS04) above. He found a thermoelectric force between two solutions of the same salt of different concentrations. The thermoelectric forces obeyed Volta s law. E. du Bois-Reymond and Wild did not detect a Peltier effect by passing a current through the junctions, but the effect was later observed by Schultz-Sellack. ... 

Ann. Phys.y 1870, cxli, 467. Carl Schultz-Sellack (Potsdam, 31 March 1844-Berlin, 18 March 1879), first assistant to Magnus in Berlin, then professor of physics in Cordoba, Argentina (1873-4), returned to Berlin but travelled extensively. He described the modifications of sulphur trioxide Ann. Phys.y 1870, cxxxix, 480), anhydrous acid (Na2S206) and normal sodium sulphites jf. prakt. Chem.y 1870, cx, 459), and compounds of sulphur trioxide Ber.y 1871, iv, 109), and published on photography. 

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