Londres, y W. G. M'Millan, Profesor de Metalurgia en el Mason's College de Birmingham. Con 122 ilustraciones. 8vo en entresijo (Fcp. 8vo.), 7s. 6d.

RHEAD.—METALLURGY. An Elementary Text Book. By E. C. Rhead, Lecturer on Metallurgy at the Municipal Technical School, Manchester. With 94 Illustrations. Fcp. 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.

ASTRONOMÍA, NAVEGACIÓN, 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.—Obras de Sir ROBERT S. BALL, LL.D., F.R.S.

ELEMENTOS DE ASTRONOMÍA.

Con 130 figuras y diagramas.

En 8.º en avena, 6s. 6d.