The electron, its isolation and measurement and the determination of some of its properties

THE UNIVERSITY OF CHICAGO SCIENCE SERIES
Editorial Committee ELIAKIM HASTINGS MOORE, Chairman JOHN MERLE COULTER PRESTON KYES
THE UNIVERSITY OF CHICAGO SCIENCE SERIES, established by the Trustees of the University, owes its origin to a belief that there should be a medium of publication occupying a position between the technical journals with their short articles and the elaborate treatises which attempt to cover several or all aspects of a wide field. The volumes of the series will differ from the discussions generally appearing in technical journals in that they will present the complete results of an experiment or series of investigations which previously have appeared only in scattered articles, if published at all. On the other hand, they will differ from detailed treatises by confining themselves to specific problems of current interest, and in presenting the subject in as summary a manner and with as little technical detail as is consistent with sound method. They will be written not only for the specialist but for the educated layman.
THE UNIVERSITY OF CHICAGO PRESS CHICAGO, ILLINOIS THE BAKER & TAYLOR COMPANY NEW YORK THE CAMBRIDGE UNIVERSITY PRESS LONDON THE MARUZEN-KABUSHIKI-KAISHA TOKYO, OSAKA, KYOTO, FUKUOKA, SENDAI THE MISSION BOOK COMPANY SHANGHAI
ITS ISOLATION AND MEASUREMENT AND THE DETERMINATION OF SOME OF ITS PROPERTIES
Robert Andrews Millikan
Formerly Professor of Physics, the University of Chicago Director Norman Bridge Laboratory of Physics California Institute of Technology
THE UNIVERSITY OF CHICAGO PRESS CHICAGO, ILLINOIS
COPYRIGHT 1917 BY THE UNIVERSITY OF CHICAGO All Rights Reserved Published August 1917 Second Impression February 1918 Third Impression November 1918 Fourth Impression December 1910 Fifth Impression February 1921 Second Edition October 1924
Composed and Printed By The University of Chicago Press Chicago, Illinois, U.S.A.
TO ALBERT A. MICHELSON AND MARTIN A. RYERSON THIS SMALL OUTGROWTH OF THEIR INSPIRATION AND GENEROSITY IS RESPECTFULLY DEDICATED