117. SUBTERRANEOUS SURVEYING, Elementary and Practical

Treatise on, with and without the Magnetic Needle. By Thomas Fenwick, Surveyor of Mines, and Thomas Baker, C.E. Illustrated. 2s. 6d.#

133. METALLURGY OF COPPER ; an Introduction to the Methods of Seeking, Mining, and Assaying Copper, and Manufacturing its Alloys. By Robert H. Lamborn, Ph.D. Woodcuts. 2s. 6d.t

134. METALLURGY OF SILVER AND LEAD. A Description of the Ores ; their Assay and Treatment, and valuable Constituents. By Dr. R. H. Lamborn. Woodcuts. 2s. 6d.#

135. ELECTRO-METALLURGY; Practically Treated. By Alexander Watt, F.R.S.S.A. 7th Edition, revised, with important additions, including the Electro-Deposition of Nickel, etc. Woodcuts. 3s.#

172. MINING TOOLS, Manual of. For the Use of Mine Managers, Agents, Students, etc. By William Morgans. 2s. 6d.t 172*. MINING TOOLS, ATLAS of Engravings to Illustrate the above, containing 235 Illustrations, drawn to Scale. 4to. 4s. 6d.; cloth boards, 6s.

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180. COAL AND COAL MINING, A Rudimentary Treatise on. By Warington W. Smyth, M.A., F.R.S. Fifth Edition, revised and enlarged. With numerous Illustrations. 3s. 6d.# [ Just Published.

195. THE MINERAL SURVEYOR AND VALUER'S COM-PLETE GUIDE, with new Traverse Tables, and Descriptions of Improved Instruments; also the Correct Principles of Laying out and Valuing Minera' Properties. By William Lintern, Mining and Civil Engineer. 3s. 6d #

214. SLATE AND SLATE QUARRYING, Scientific/Practical, and Commercial. By D. C. Davies, F.G.S., Mining Engineer, etc. With numerous Illustrations and Folding Plates. 3s.%

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225. THE SILVERSMITH'S HANDBOOK, containing full In-structions for the Alloying and Working: of Silver. By George E. Gee. 3s.*

220. MAGNETIC SURVEYING, AND ANGULAR SURVEY-

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