536 SEC. 13. CHEMISTRY. 



is run into iron vessels, where a large part of the soda crystallizes 

 out. 



Gaskcll, Deacon, $ Co., Lancashire. 

 Composition : 



Na 2 CO 3 +10 Aq. 



2718. No. 1. Alkaline Silicate of Soda (glass), suitable for 

 soap making. William Gossage fy Sons, Lancashire. 



Composition : 



100 parts, Nag O. 

 180 SiO 2 . 



2719. No. 2. Silicate of Soda (glass), suitable for calico 

 printing. William Gossage fy Sons, Lancashire. 



Composition : 



100 parts, NasO. 

 310 SiO 2 . 



2720. No. 3. Silicate of Potash (glass). 



William Gossage fy Sons, Lancashire. 

 Composition : 



100 parts, K 2 O. 

 310 SiO 2 . 



2721. No. 4. Solution of Alkaline Silicate of Soda, made 

 from No. 1. 1,500 specific gravity. 



William Gossage Sons, Lancashire. 



2722. No. 5. Solution of Silicate of Soda, 1,375 specific 

 gravity. Made from No. 2. 



William Gossage fy Sons, Lancashire. 



2723. No. 6. Solution of Silicate of Potash, 1,350 specific 

 gravity. Made from No. 3. 



William Gossage Sons, Lancashire. 



2724. No. 1. Cupreous Iron Pyrites, employed in the 

 manufacture of sulphuric acid. 



Widnes Metal Company. 



Water - ... -70 



Sulphur - - 49 '00 



Arsenic - '47 



Iron - 43*55 



Copper - - - 3 -20 



Zinc - - -35 



Lead - - -93 



Lime _ 10 



Siliceous residue - - . *63 



Oxygen, and traces of various metals - 1 07 



100-00 



