Thus the chronology of magic shadows, or the origin of the motion picture, concludes with a roll of names of men of many nations, a point illustrative both of the universal appeal of the motion picture and of the long and diverse collection of individuals who contributed to the development of the art-science. _Appendix II_ BIBLIOGRAPHY _and Acknowledgements_ The pursuit of the story of the origin of the motion picture has been carried on intermittently since the Winter of 1936–37. As historical books must be, it is based mainly on the written record. Efforts were made, whenever possible, to go directly to the source material. The whole field of books on the motion picture, as well as standard biographical and scientific works, was surveyed. Research was conducted principally at the following libraries: Library of Congress, Georgetown University, Surgeon General’s, in Washington, D. C., New York Public and Columbia University in New York City. Work was also done at the Academy of Motion Picture Arts and Sciences, Hollywood; New York Engineering Societies, the British Museum, London; Trinity College, Dublin, and Vittorio Emanuele--formerly Collegio Romano--library, Rome. Part of the original Kircher Museum at Rome, was inspected in the Summer of 1939. (The early projector models, according to the evidence now available were destroyed shortly after Kircher’s death.) The 1939 exhibit of the works of Leonardo da Vinci in Milan was visited. Terry Ramsaye, author of _A Million and One Nights--A History of the Motion Picture_, and editor of _Motion Picture Herald_, is responsible for suggesting lines of study which led to the decision to write this book. Also, he has rendered valuable guidance and assistance especially in connection with the early American motion picture pioneers, and in reading the manuscript and contributing the foreword. Special thanks are due to members of the faculty of Georgetown University for making available works in the Riggs Memorial Library of that institution and giving assistance on special aspects of the subject. The writer likewise is grateful for having had the opportunity of consulting books in the splendid Epstein Photographic Collection at the Columbia University Library, and for biographical notes on Robert W. Paul secured through the Cambridge Instrument Company. Appreciation is expressed to Rev. Hunter Guthrie, S.J., dean of the Graduate School, Georgetown University, and to Dr. Alfred N. Goldsmith, consulting engineer, for kindness in reading proofs and offering invaluable suggestions. BIBLIOGRAPHY