The Earth's Shifting Crust by Charles Hapgood - wire of information

ACKNOWLEDGMENTS 7
correspondence, and in personal conference, his observations
either corroborated our findings or pointed out problems
that we should attempt to solve. With regard to our inquiry,
Einstein made an exception to his usual policy, which was to
give his reactions to new ideas submitted to him, but not to
offer his suggestions for their further development. In our
case, with an uncanny sense, he put his finger directly upon
problems that were, or were to be, most baffling to us. We
had the feeling that he deeply understood what we were trying
to do, and desired to help us. Our association with him
represented an experience of the spirit as well as of the mind.
In the later stages of our inquiry, many distinguished spe-
cialists and friends helped us with particular problems. Helpful
suggestions have been contributed by Professor Frank C.
Hibben, of the University of New Mexico, Professor Bridgman,
of Harvard, Dr. John M. Frankland, of the Bureau of
Standards, the late Dr. George Sarton, Professors Walter
Bucher and Marshall Kay of Columbia University, Dr. John
Scott, Mrs. Mary G. Grand, Mr. Walter Breen, Mr. Stanley
Rowe, Dr. Leo Roberts, Mr. Ralph Barton Perry, Jr., Mrs.
Mary Heaton Vorse, Mr. Heaton Vorse, Mr. Chauncey
Hackett, Mrs. Helen Bishop, and Mrs. A. Hyatt Verrill. To
Dr. Harold Anthony, of the American Museum of Natural
our debt is enormous. It was he who afforded Mr.
History,
Campbell and me our first opportunity of discussing our
theories with a group of specialists in the earth sciences, when
he invited us to talk to the Discussion Group of the Museum.
In addition, Dr. Anthony has helpfully criticized parts of the
manuscript, and has helped me to get criticism from other
experts. Captain Charles Mayo, of Provincetown, Massachu-
setts, in many long discussions over the years, has contributed
innumerable valuable suggestions.
One far-sighted scientist without whose generous help this
book in its present form would have been impossible is Dr.
David B. Ericson, of the Lamont Geological Observatory. He
has contributed many vitally important bibliographical suggestions,
has corrected numerous technical errors, and has