Thresholds of Science
A SERIES OF HANDY SCIENTIFIC TEXT-BOOKS, WRITTEN IN SIMPLE, NON-TECHNICAL LANGUAGE, AND ILLUSTRATED WITH NUMEROUS PICTURES AND DIAGRAMS.
Crown 8vo. 2/6 net per volume.
Mechanics. C. E. Guillaume. 200 + xiii pages. 50 Illustrations.
Chemistry. Georges Darzens. 122 + x pages. 31 Illustrations.
Botany. E. Brucker. 185 + xv pages. 235 Illustrations.
Zoology. E. Brucker. 219 + xiii pages. 165 Illustrations.
Mathematics. C. A. Laisant. 158 + viii pages. Over 100 Illustrations.
Astronomy. Camille Flammarion. 191 + xi pages. 184 Illustrations.