XVIII. The NATURE of LIGHT, with a General Account of PHYSICAL OPTICS. By Dr. EUGENE LOMMEL. With 188 Illustrations and a Table of Spectra in Chromo-lithography. Sixth Edition.
XIX. ANIMAL PARASITES and MESSMATES. By Monsieur VAN BENEDEN. With 83 Illustrations. Fourth Edition.
XX. FERMENTATION. By Professor SCHÜTZENBERGER. With 28 Illustrations. Fourth Edition.
XXI. The FIVE SENSES of MAN. By Professor BERNSTEIN. With 91 Illustrations. Seventh Edition.
XXII. The THEORY of SOUND in its RELATION to MUSIC. By Professor PIETRO BLASERNA. With numerous Illustrations. Sixth Edition.
XXIII. STUDIES in SPECTRUM ANALYSIS. By J. NORMAN LOCKYER, F.R.S. With Six Photographic Illustrations of Spectra, and numerous Engravings on Wood. Fifth Edition. 6_s._ 6_d._
XXIV. A HISTORY of the GROWTH of the STEAM ENGINE. By Professor R. H. THURSTON. With numerous illustrations. Fifth Edition.
XXV. EDUCATION as a SCIENCE. By ALEXANDER BAIN, LL.D. Ninth Edition.
XXVI. The HUMAN SPECIES. By Professor A. DE QUATREFAGES, Membre de l'Institut. Fifth Edition.
XXVII. MODERN CHROMATICS. With Application to Art and Industry. By OGDEN N. ROOD. Third Edition. With 130 original Illustrations.
XXVIII. The CRAYFISH: an Introduction to the Study of Zoology. By T. H. HUXLEY, F.R.S. Sixth Edition. With 82 Illustrations.
XXIX. The Brain As an Organ of Mind. By H. CHARLTON BASTIAN, M.D. Fourth Edition. With 184 Illustrations.
XXX. The ATOMIC THEORY. By Professor A. WURTZ. Translated by E. CLEMINSHAW, F.C.S. Seventh Edition.
XXXI. The NATURAL CONDITIONS of EXISTENCE as they affect Animal Life. By KARL SEMPER, Fifth Edition. With 2 Maps and 106 Woodcuts.
XXXII. GENERAL PHYSIOLOGY of MUSCLES and NERVES. By Prof. J. ROSENTHAL. Fourth Edition. With 75 Illustrations.
XXXIII. SIGHT: an Exposition of the Principles of Monocular and Binocular Vision. By JOSEPH LE CONTE, LL.D. Third Edition. With 132 Illustrations.
XXXIV. ILLUSIONS: a Psychological Study. By JAMES SULLY. Fourth Edition.
XXXV. VOLCANOES: what they are and what they teach. By JOHN W. JUDD, F.R.S. Fifth Edition. With 96 Illustrations.
XXXVI. SUICIDE: an Essay on Comparative Moral Statistics. By Professor H. MORSELLI. Third Edition.
XXXVII. The BRAIN and its FUNCTIONS. By J. LUYS, Physician to the Hospice de la Salpétrière. With numerous Illustrations. Third Edition.