152 TRANSACTIONS OF TNE CANADIAN INSTITUTE [VoL. VIII. 
VIII.—Coal-Tar and Asphalt. 
IX.—Calcium Carbide, Carborundum, Corundum and Graphite. 
X.—The Cement and Plaster Industry. 
XI.—The Beet-Sugar Industry. 
XII.—Natural Gas and Petroleum. 
XIII.—Pulp and Paper. 
XIV.—Asbestos and Mica 
I.—CoMMON Sat, ALKALI AND CHLORINE COMPOUNDS. 
Sodium chloride is found in the upper silurian beds in Ontario, and in 
the Devonian in Manitoba and Athabasca; salt springs also occur in Cape 
Breton and in New Brunswick, but these are comparatively unimportant 
sources of supply. In Ontario the salt area stretches through the counties 
of Middlesex, Huron, Bruce, and Lambton, large deposits being found 
along the shore of Lake Huron from Kincardine to Windsor. At Goderich 
there is a deposit 126 feet thick, and at Windsor a well extending to a 
depth of 1,672 feet passes through four beds of rock salt of an aggregate 
thickness of 392 feet.! The salt is obtained by evaporation, and is of an 
excellent quality. The following comparison serves to illustrate the purity 
of the natural product.? 
Natural Salt Natural Salt 
of Goderich, of Cheshire, 
Ontario. (England. ) 
Per Cent. Per Cent. 
Sodiumychlonridesjas- peice ace eo eee enc 99 .687 96.70 
Caleninyehlordesngpevecusins ieee sieis he eicks eheceteey ster 0.032 0.68 
Magrresttum: Chlornde toi. y-0- ac sists oma eon 0.095 0.00 
Caleniumn/sulphater cece sarin omens ose SE eS HIS 0.090 0.25 
IMOISELIRG § Heats thus ts aic WlaKeleiaiche eieze oe oS eishalea ele ELS 0.079 0.63 
Insoluble matter jac. %, 8 eves ccd iets nes eeu o 0.017 1.74 
100.000 100.000 
Total Am purcheiessyo-recie- aeleee eters 0.234 Dal O17) 
The total production of salt in Canada was valued in 1892 at $162,000, 
in 1901 at $262,328, and in 1903 at $334,000.° 
Apart from its use as a seasoning and as a preservative, common salt 
is employed in the electrolytic preparation of caustic soda and bleaching 
compounds. 
The alkali and bleaching powder industries throughout the world 
(1) W. Hodgson Ellis, M.B., in “‘ A Handbook of Canada,”’ 1897. 
(2) Wilmott, A.B., ‘‘Some Minor Minerals of Canada,’’ 1897. 
(3 bis.) Statistical Year Book, 1903. 
