48 



Patent chromate of amniODia. 



A curious form of plate sulphate coloured with a trace of 

 sulphate of chromium. 



Chromate of calcium. 



Patent pure crystallised bichromate of soda (as packed in 

 casks). 



Chromate of barium. 



Chromate of potash. 



Chrome iron ore. 



Chrome iron ore (Russian). 



Chromate of soda (2) calcined and crystallised. 



Chromate of strontium. 



Pyrites. 



Patent bichromate of soda,. 



Chromic oxide. 

 Limestone. 

 White chemical salt. 

 Burnt pyrites. 

 Salt cake. 

 Nitre cake. 

 Sulphate of potash. 

 Black ash. 

 Solutions of : 



Bichromate of soda (saturated) (sodium bichromate). 

 Bichromate of potash (saturated) (potassium bichromate). 

 Muriatic acid (hydrochloric acid). 

 Vitriol (sulphuric acid). 



Muriate of potash (kelp) (potassium chloride). 

 Muriate of potash (German) (potassium chloride). 

 Trichromate of potash (potassium trichromate). 

 Chloro-chromate of potash (potassium chloro-chromate). 

 Bichromate of potash, large crystals. 



Bichromate of potash, crystals in form of a crown on pedestal. 

 Bichromate of soda, large crystals. 

 Chrome alum crystal in form of an octahedron. 



158. Specimens of bichromate of potash and bichro- 

 mate of soda. 



Exhibited by Eglinton Chemical Company, Glasgow . 



1885. 



159. Collection of chemical substances. 



1876. Messrs. SoucJc $ Co. 



Sulphate of copper ; copper precipitate ; copper oxide ; agri- 

 cultural sulphate of copper ; nitrate of lead ; sulphate of am- 

 monia ; sulphate of zinc ; red prussiate of potash ; yellow 

 prussiate of potash ; crude sulphur ; roll sulphur ; flour sulphur ; 

 crude carbolic acid ; coal tar solvent naphtha ; coal tar creosote ; 

 benzole, 50 per cent. ; anthracene ; anthracene oil ; naphthalene ; 

 pitch. 



