Practical Mathematics FOR THE Engineer and Electrician BY ELMER E. BURNS Author of "The Electric Motor and Its Practical Operation," AND JOSEPH G. BRANCH, B. Š., M. Ei Former Chief of the Department of Inspection Boilers and Elevators, and of Mechanical Engineers, Etc. Author of "Stationary Engineering," " 'Conversations on Electricity,' "Prac- SECOND EDITION CHICAGO: The Joseph G. Branch Publishing Company |