ELECTRIC HEATING BY EDWIN J. HOUSTON, Ph. D., (Princeton) AND A. E. KENNELLY, Sc. D. NEW YORK NEW YORK THE W. J. JOHNSTON COMPANY. 253 Broadway 1895 THE NEW YORK ASTOR, LENOX AND 1838. COPYRIGHT, 1895, BY THE W. J. JOHNSTON COMPANY. PREFACE entitled IN preparing this volume on ELECTRIC HEATING, as one of a series The Elementary Electro-Technical Series, the authors believe they are meeting a demand, that exists on the part of the general public, for reliable information respecting such matters in electricity as can be readily understood by those not especially trained in electro-technics. The subject of electric heating is today attracting no little attention. The wonderful growth in electric street railways, coupled with the readiness with which the current can be applied to the heating of the cars, together with the marked efficiency of the electric air heater as an apparatus for transforming electric energy into heat energy, have, during the last decade, caused a develop |