CHAPTER XL

THE CHEMICAL TRADES. By A. P. LAURIE, M.A., _Principal, Heriot-Watt College, Edinburgh_, 568

Introductory Remarks--The Le Blanc Process--Alkali Manufacture, other Methods--The Chemical Worker--Hours of Work in Alkali Manufacture--The Administration of the Alkali Act--Output Method of Paying Wages--Bichromate of Potash Manufacture--Coal Tar Products--Bisulphide of Carbon--Phosphorus--Health of Chemical Workers as shown by Statistics.