Chapter six: Heady Days

The contents of the National Security Council’s agenda and mention of Lay’s phone calls to Alan Waterman (page 58) are among Waterman’s papers in the Library of Congress.

Information about Tycho Brahe and Johannes Kepler (page 59) comes principally from an essay on Kepler by Sir Oliver Lodge in The World of Mathematics, edited by James R. Newton (Tempus, 1956). Textbooks con­sulted for pages 60 and 61 are Introduction to Space:The Science of Spaceflight, by Thomas D. Damon. A foundation series book, chapter three deals with orbits (Orbit Book Company, 1989); The Feynman Lectures on Physics, vol­ume one, chapter 7 (Addison Wesley, 1963).

Bill Guier and George Weiffenbach supplied the information for pages 61 to 65.

The textbook consulted for pages 65 to 69 is The Feynman Lectures on Physics, volume one, chapter 34 (Addison Wesley, 1963).

The material on pages 70 to 72 is based on the memories of George Weiffenbach, Bill Guier, and Henry Elliott. They all spoke to me inde­pendently. Guier and Weiffenbach spoke to me many times. Each remem­bered things a little differently, but their memories differed little in sub­stance. These memories are, to my knowledge, the only sources of information for Guier’s and Weiffenbach’s work in October at APL. As far as I know, there are no written records, not even laboratory notes, that support the assertion that Guier’s and Weiffenbach s work was unofficial and an indulgence of curiosity.