20 The Appeal to Arms, by James
Kendall Hosmer, LL.D., formerly
Librarian Minneapolis Pub. Lib.
21 Outcome of the Civil War, by
James Kendall Hosmer, LL.D.
Vol. 22 Reconstruction, Political and Eco-
nomic, by William Archibald Dun-
ning, Ph.D., Prof. Hist. and Politi-
cal Philosophy, Columbia Univ.
23 National Development, by Edwin
Erle Sparks, Ph.D., Pres, Pa. State
24 National Problems, by Davis R.
Dewey, Ph.D., Professor of Eco-
nomics, Mass. Inst. of Technology.
25 America as a World Power, by John
H. Latané, Ph.D., Prof. Am. Hist.,
John Hopkins University.
26 National Ideals Historically Traced,
by Albert Bushnell Hart, LL.D., Prof.
Government, Harvard University.
27 National Progress 1907-1917, by
Frederic Austin Ogg, Ph.D., Prof.
Political Science, Univ. of Wisconsin.
28 Index to the Series, by David May-
dole Matteson, A.M., Harvard
19 Causes of the Civil War, by Rear-
Admiral French Ensor Chadwick,
U.S.N., retired former Pres. of
Naval War College.