WORKSHOP APPLIANCES, ETC.

_NORTHCOTT._--LATHES AND TURNING, Simple, Mechanical and Ornamental.
By W. H. NORTHCOTT. With 338 Illustrations. 8vo., 18_s._

_SHELLEY._--WORKSHOP APPLIANCES, including Descriptions of some of the
Gauging and Measuring Instruments, Hand-cutting Tools, Lathes,
Drilling, Planeing, and other Machine Tools used by Engineers. By C.
P. B. SHELLEY, M.I.C.E. With an additional Chapter on Milling by R. R.
LISTER. With 323 Woodcuts. Fcp. 8vo., 5_s._

MINERALOGY, METALLURGY, ETC.

_BAUERMAN._--Works by HILARY BAUERMAN, F.G.S.

SYSTEMATIC MINERALOGY. With 373 Woodcuts and Diagrams. Fcp.
8vo., 6_s._

DESCRIPTIVE MINERALOGY. With 236 Woodcuts and Diagrams. Fcp.
8vo., 6_s._

_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., 6_s._

_HUNTINGTON AND McMILLAN_--METALS: their Properties and Treatment. By
A. K. HUNTINGTON, Professor of Metallurgy in King's College, London,
and W. G. McMillan, Lecturer on Metallurgy in Mason's College,
Birmingham. With 122 Illustrations. Fcp. 8vo., 7_s._ 6_d._

_RHEAD._--METALLURGY. An Elementary Text-Book. By E. C. RHEAD,
Lecturer on Metallurgy at the Municipal Technical School, Manchester.
With 94 Illustrations. Fcp. 8vo., 3_s._ 6_d._

_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., 4_s._
6_d._

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., 2_s._

_BALL._--Works by Sir ROBERT S. BALL, LL.D., F.R.S.

ELEMENTS OF ASTRONOMY. With 130 Figures and Diagrams. Fcp.
8vo., 6_s._ 6_d._

A CLASS-BOOK OF ASTRONOMY. With 41 Diagrams. Fcp. 8vo.,
1_s._ 6_d._

_DE CAMPIGNEULLES._--OBSERVATIONS TAKEN AT DUMRAON, BEHAR, INDIA,
during the Eclipse of the 22nd January, 1898, by a Party of Jesuit
Fathers of the Western Bengal Mission. By the Rev. V. DE
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_GILL._--TEXT-BOOK ON NAVIGATION AND NAUTICAL ASTRONOMY. By J. GILL,
F.R.A.S., late Head Master of the Liverpool Corporation Nautical
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