Chapter Vii.--Methods and Cost of Laying Concrete in

FREEZING WEATHER. 112

Introduction--Lowering the Freezing Point of the Mixing Water; Common Salt (Sodium Chloride):--Freezing Temperature Chart--Heating Concrete Materials; Portable Heaters; Heating in Stationary Bins; Other Examples of Heating Methods, Power Plant, Billings, Mont., Wachusett Dam, Huronian Power Co. Dam, Arch Bridge, Piano, Ill., Chicago, Burlington & Quincy R. R. Work, Heating in Water Tank--Covering and Housing the Work; Method of Housing in Dam, Chaudiere Falls, Quebec; Method of Housing in Building Work.