Pupin’s Birthplace FACING PAGE 4 The Old Monument on Staro Selo 4 Olympiada Pupin, Mother of Michael Pupin 10 The Village Church in Idvor 36 Nassau Hall, Princeton University 68 An Early View of Cooper Union 74 Men of Progress--American Inventors 78 Photograph of Pupin Taken in 1883 136 Joseph Henry 204 John Tyndall 204 Michael Faraday 220 Herman von Helmholtz 232 The Hertzian Oscillator page 265 Henry Augustus Rowland 290 James Clerk Maxwell 290 Electrical Discharges Representing Two Types of Solar Coronæ 294 Solar Corona of 1922 294 Sir J. J. Thomson 306 Wilhelm Konrad Rœntgen 306 Pupin’s Residence at Norfolk, Conn. 328 Dr. George Ellery Hale, Honorary Chairman of the National Research Council 372 The National Research Council Building, Washington, D. C. 372 Facsimile of Letter from President Harding page 386 FROM IMMIGRANT TO INVENTOR I WHAT I BROUGHT TO AMERICA When I landed at Castle Garden, forty-eight years ago, I had only five cents in my pocket. Had I brought five hundred dollars, instead of five cents, my immediate career in the new, and to me a perfectly strange, land would have been the same. A young immigrant such as I was then does not begin his career until he has spent all the money which he has brought with him. I brought five cents, and immediately spent it upon a piece of prune pie, which turned out to be a bogus prune pie. It contained nothing but pits of prunes. If I had brought five hundred dollars, it would have taken me a little longer to spend it, mostly upon bogus things, but the struggle which awaited me would have been the same in each case. It is no handicap to a boy immigrant to land here penniless; it is not a handicap to any boy to be penniless when he strikes out for an independent career, provided that he has the stamina to stand the hardships that may be in store for him. * * * * *