CONTENTS OF VOL. XV. IN THE WAKE OF THE "CHALLENGER." By J. G. Galton, M.A., PROFESSOR TYNDALL'S EXPERIMENTS ON SPONTANEOUS GENERATION, ON THE EXTINCT ANIMALS OF NORTH AMERICA. By Professor William H. Flower, F.R.S. Illustrated ... ... ... ON THE PROGRESS OF AERONAUTICS. By Fred. W. Brearey THE PARALLEL ROADS OF GLEN ROY. By Professor Tyndall, D.C.L. REVIEWS OF BOOKS ... 84, 185, 299, 406 |