6THE DUTCH AND QUAKER COLONIES IN AMERICA
19DARWINISM, AND OTHER ESSAYS
7NEW FRANCE AND NEW ENGLAND
20MYTHS AND MYTH-MAKERS
8THE AMERICAN REVOLUTION
21THE UNSEEN WORLD
9THE CRITICAL PERIOD OF AMERICAN HISTORY, 1783-1789
22EXCURSIONS OF AN EVOLUTIONIST
10THE WAR OF INDEPENDENCE
23A CENTURY OF SCIENCE
11THE MISSISSIPPI VALLEY IN THE CIVIL WAR
24CIVIL GOVERNMENT IN THE UNITED STATES
12A HISTORY OF THE UNITED STATES FOR SCHOOLS
25HOUGHTON MIFFLIN COMPANY
13AMERICAN POLITICAL IDEAS
