516 



SEC. 13. CHEMISTRY. 



3. Sulphur liquor. 



4. Precipitated sulphur. 



5. Sulphur in bulk. 



6. Roll sulphur. 



John Hutchinson Co. 



2472. Samples of Bicarbonate of Soda unground ; also 

 ground and dressed. John ftutchinson fy Co. 



2473. Specimens of Alum Crystals. 



H. B. J. van Rijn, Venlo, Netherlands. 



3 Crystals of potash-alum. 



>* j> 

 10 



4 Crystals of chrome-alum. 



2 covered with potash-alum. 



1 Crystal of potash-alum of o kilo. 

 1 3kilo. 



2474. Clement Winkler's Apparatus. Robert Galloway. 



This apparatus is for the technical analysis of gases, and may be fairly 

 termed a gas burette. 



2475. Chemicals for use in various Manufactures. 



Liquid archill, made from Orchella weed, for dyers and 



printers. 

 Sulphate of alumina, for sugar refiners, paper makers, and 



dyers. 



Aluminous cake, for paper makers. 

 Cudbear, made from Orchella weed, for dyers. 

 Bichromate of potash, with samples of chrome ore, limestone, 



and sulphate of potash, from which it is made. 



W. J. Norris and Brother. 



2476. Aniline and other Chemical Products used for 



Dyeing. 



Brooke, Simpson and Spiller. 



Commercial Name. 



Rosaniline base - - 



Rosaniline hydrochlorate 

 Crysaniline- - - 



Methyl-rosaniline acetate - 

 Tri-methyl rosaniline acetate 



Dim^hyl-phenyi-rosaniline ace- 

 Phenyl-rosaniline hydrochlorate - 



Roseine crystals. 

 Phosphine! 



H 2 O 

 Cl 

 s 



N S }C 2 H S O 2 Hofmann violet. 



*\ 

 N 3 ^C 2 H 3 O 2 



j 





3 

 N 3 JHC1 



Eclipse violet. 



Spiller purple . 

 Imperial violet. 



