GORE.—THE ART OF ELECTRO-METALLURGY, including all known Processes of Electro-Deposition. By G. Gore, LL.D., F.R.S. With 56 Woodcuts. Fcp. 8vo., 6s.
MITCHELL.—A MANUAL OF PRACTICAL ASSAYING. By John Mitchell, F.C.S. Revised, with the Recent Discoveries incorporated. By W. Crookes, F.R.S. With 201 Illustrations. 8vo., 31s. 6d.
RHEAD.—METALLURGY. An Elementary Text-Book. By E. C. Rhead, Lecturer on Metallurgy at the Municipal Technical School, Manchester. With 94 Illustrations. Crown 8vo., 3s. 6d.
RUTLEY.—THE STUDY OF ROCKS: an Elementary Text-book of Petrology. By F. Rutley, F.G.S. With 6 Plates and 88 Woodcuts. Fcp. 8vo., 4s. 6d.
ASTRONOMY, NAVIGATION, ETC.
ABBOTT.—ELEMENTARY THEORY OF THE TIDES: the Fundamental Theorems Demonstrated without Mathematics and the Influence on the Length of the Day Discussed. By T. K. Abbott, B.D., Fellow and Tutor, Trinity College, Dublin. Crown 8vo., 2s.
BALL.—Works by Sir ROBERT S. BALL, LL.D., F.R.S.
ELEMENTS OF ASTRONOMY. With 130 Figures and Diagrams. Fcp. 8vo., 6s. 6d.
A CLASS-BOOK OF ASTRONOMY. With 41 Diagrams. Fcp. 8vo., 1s. 6d.