Chicago, Illinois: University of Chicago Press 1917. First Edition. xii, 268 pp, [1-advertisement, reverse blank]; 33 figures plus large chart of the elements in Appendix H. Original red cloth binding. Mild fading to spine panel, gilt title still readable if a bit faded. Extreme tips of upper corners bumped (not affecting textblock). Front flyleaf has previous owner name inked and some abrasions where (presumably) previous owner names were erased too aggressively. Acid ghosting from a few newspaper clippings on the front endpapers. Hinges sound and tight. Otherwise clean internally, gilding on front cover clean and sharp. A sound, above average copy. Very Good. Cloth. 
"In 1909 Millikan measured the charge of the electron, a feat for which he won the 1923 Nobel Prize in physics." (Concise DSB).