15 SEPTEMBER 1883, page 20

The Early Caliphs.*

Tins is a nourishing book. Most men are conscious of a certain interest in the early Caliphs, the most distinct and notable series of men whom Asia has produced; and also of a......

A New Theory Of Force.*

THE pith of this volume will be found in the introduction and in the concluding chapter. The author's reading in physics, chemistry, physiology, and electricity has led him to......