XIX. Animal Parasites and Mess-mates. By Monsieur Van Beneden, Professor of the University of Louvain, Correspondent of the Institute of France. With 83 Illustrations. Second Edition. Crown 8vo. price 5s.
XX. Fermentation. By Professor Schützenberger, Director of the Chemical Laboratory at the Sorbonne. With 28 Illustrations. Second Edition. Crown 8vo. price 5s.
XXI. The Five Senses of Man. By Professor Bernstein, of the University of Halle. With 91 Illustrations. Second Edition. Crown 8vo. price 5s.
XXII. The Theory of Sound in its Relation to Music. By Professor Pietro Blaserna, of the Royal University of Rome. With numerous Illustrations. Second Edition. Crown 8vo. price 5s.
XXIII. Studies in Spectrum Analysis. By J. Norman Lockyer. F.R.S. With six photographic Illustrations of Spectra, and numerous engravings on Wood. Crown 8vo. Second Edition. Price 6s. 6d.
Forthcoming Volumes.
Prof. W. Kingdon Clifford, M.A. The First Principles of the Exact Sciences explained to the Non-mathematical.
W. B. Carpenter, LL.D., F.R.S. The Physical Geography of the Sea.
Sir John Lubbock, Bart., F.R.S. On Ants and Bees.