Watchers of the Sky

PREFACE: This volume while it is complete in itself, is also the first of a trilogy, the scope of which is suggested in the prologue. The story of scientific discovery has its own epic unity - a unity of purpose and endeavour - the single torch passing from hand to hand through the centuries; and the great moments of science when, after long labour, the pioneers saw there accumulated facts falling into a significant order.....Many of the earliest books, particularly those dating back to the 1900