NEW YORK
GROSSET & DUNLAP
PUBLISHERS
COPYRIGHT, 1910, BY DOUBLEDAY, PAGE & COMPANY
PUBLISHED, OCTOBER, 1910
ALL RIGHTS RESERVED, INCLUDING THAT OF TRANSLATION
INTO FOREIGN LANGUAGES, INCLUDING THE SCANDINAVIAN
ACKNOWLEDGMENTS
A number of the photographs in this volume are used by permission of the American Museum of Natural History. The star maps and drawings of the constellations are by Mrs. Jerome B. Thomas. The poem by Longfellow, quoted in part, is with the permission of the publishers, Houghton, Mifflin & Co.