NATURE SERIES.

POPULAR LECTURES AND ADDRESSES ON VARIOUS SUBJECTS IN PHYSICAL SCIENCE. By Sir WILLIAM THOMSON, D.C.L., LL.D., F.R.S.E., Fellow of St. Peter's College, Cambridge, and Professor of Natural Philosophy in the University of Glasgow. With Illustrations. 3 vols. Crown 8vo. Vol. I. Constitution of Matter. 6s.

ON THE ORIGIN AND METAMORPHOSES OF INSECTS. By Sir JOHN LUBBOCK, Bart., F.R.S., M.P., D.C.L., LL.D. With numerous Illustrations. Third Edition. Crown 8vo. 3s. 6d.

ON BRITISH WILD FLOWERS CONSIDERED IN RELATION TO INSECTS. By Sir JOHN LUBBOCK, Bart., F.R.S., M.P., D.C.L., LL.D. With Illustrations. Fourth Edition. Crown 8vo. 4s. 6d.

FLOWERS, FRUITS, AND LEAVES. By Sir JOHN LUBBOCK, F.R.S., &c. Second Edition. Crown 8vo. 4s. 6d.

THE TRANSIT OF VENUS. By G. Forbes, M.A., Professor of Natural Philosophy in the Andersonian University, Glasgow. Illustrated. Crown 8vo. 3s. 6d.

THE COMMON FROG. By St. George Mivart, F.R.S., Lecturer in Comparative Anatomy at St. Mary's Hospital. With numerous Illustrations. Crown 8vo. 3s. 6d.

POLARISATION OF LIGHT. By W. Spottiswoode, F.R.S. With Illustrations. Fourth Edition. Crown 8vo. 3s. 6d.

THE SCIENCE OF WEIGHING AND MEASURING, AND THE STANDARDS OF MEASURE AND WEIGHT. By H. W. CHISHOLM, Warden of the Standards. With numerous Illustrations. Crown 8vo. 4s. 6d.

HOW TO DRAW A STRAIGHT LINE: a Lecture on Linkages. By A. B. KEMPE. With Illustrations. Crown 8vo. 1s. 6d.