20 The Wanderings of Peoples. By Dr A. C. Haddon, F.R.S.
29 Prehistoric Man. By Dr W. L. H. Duckworth.
GEOLOGY
35 Rocks and their Origins. By Prof. Grenville A. J. Cole.
44 The Work of Rain and Rivers. By T. G. Bonney, Sc.D.
7 The Natural History of Coal. By Dr E. A. Newell Arber.
30 The Natural History of Clay. By Alfred B. Searle.
34 The Origin of Earthquakes. By C. Davison, Sc.D., F.G.S.
62 Submerged Forests. By Clement Reid, F.R.S.
72 The Fertility of the Soil. By E. J. Russell, D.Sc.