under the late Sir John Guest, Bart., subsequently at the Hirwain and Forest Works under Mr. Crawshay, second edition, revised from the manuscript of the late Mr. Truran by J. Arthur Phillips, author of "A Manual of Metallurgy," "Records of Mining," &c., and W. H. Dorman, C.E., royal 4to, cloth, illustrated by 84 plates of Furnaces and Machinery, £3 10s.

"It has seldom fallen to our lot to introduce to the notice of the scientific public a more valuable work than this. It is evidently the result of long, careful, and practical observation, and it forms at once a glorious monument to the memory of its author, and an excellent guide to those who are directly or indirectly interested in the great Subject of which it treats."-Mechanics' Magazine, September, 1862. JONATHAN HULLS.

A description and draught of a new invented Machine for carrying Vessels or Ships out of or into any Harbour, Port, or River, against Wind and Tide, or in a calm, by Jonathan Hulls, 1737, reprint in fac-simile, 12mo, half morocco, reduced to 2s.

LIFE CONTINGENCIES.—

A Brief View of the Works of the earlier eminent writers on the doctrine of Life Contingencies, by Thomas Carr, 8vo, sewed, 1s.

LOCKS AND SAFES.

A Treatise on Fire and Thief-proof Depositories and Locks and Keys, by George Price, in one large vol. (916 pages), with numerous woodengravings, 8vo, cloth gilt, 5s.

LOCKS AND SAFES.

A Treatise on Gunpowder-proof Locks, Gunpowder-proof Lock Chambers, Drill-proof Safes, Burglars' methods of opening Iron Safes, and the various methods adopted to prevent them; why one maker's safes are better than another's; the Burnley Test, its history and results, by George Price, author of "A Treatise on Fire and Thief-proof Depositories and Locks and Keys," demy 8vo, cloth, with 46 wood-engravings, 1s.

Railway, Bridge, and other Engineering Works,
with Essays and Reviews, edited by W. Humber,
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lished monthly, price to subscribers, payable in
advance, £2 2s. Each part contains 3 large plates
and 4 pages
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MINING.

Records of Mining and Metallurgy, or Facts and
Memoranda for the use of the Mine Agent and
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engravings by F. Delamotte, reduced to 4s., in
boards 3s.

OBLIQUE BRIDGES.

A practical Treatise on the Construction of Oblique
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ORNAMENT.—

The Book of Ornaments of every style applicable
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ORNAMENT.—

Gleanings from Ornamental Art of every style,
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PERPETUAL MOTION.

Perpetuum Mobile, or Search for Self-motive
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