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AT THE OFFICE OF THE SECRETARY, LAFAYETTE COLLEGE.

187 9.

210675

PHILADELPHIA:

SHERMAN & Co., PRINTERS.

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Hydraulic Mining in California. By A. J. BOWIE, JR., A.B.,

27 The Strength of Wrought Iron as affected by its Composition and by its Reduction in Rolling. By A. L. HOLLEY, PH.B., M.I.C.E.,

101 The Manhattan Salt Mine, at Goderich, Canada. By Oswald J. HEINRICH, 125 The Late Operations on the Mariposa Estate. By CHARLES M. ROLKER, E.M.,

145 Fluxing Silicious Iron Ores. By T. F. WITHERBEE,

164 A New Method of taking Blast-Furnace Sections. By T. F. WITHERBEE, . 170 Memoranda showing the percentage of the different Expense Accounts in

Mining Hematite Ore at the Manhattan Mine, Sharon Station, New
York. By J. F. LEWIS,

172
Notes upon the Drainage of a Flooded Ore-Pit. By John BIRKINBINE, 174
The Fire Clays and Associated Plastic Clays, Kaolins, Feldspars, and Fire
Sands of New Jersey. By Prof. John C. SMOCK, ·

177 Manganese Pig. By RossitER W. RAYMOND, Ph.D., .

192 Note upon the Cost of Construction of the Converting Works of the Edgar

Thomson Steel Company, of Pittsburg, Pa., 1873-1875. By P. BARNES, 195 Vote upon the “Blue” Process of Copying Tracings. By P. BARNES, . 197 The Economy effected by the Use of Red Charcoal. By B. FERNOW, . 199 On the Use of Red Charcoal in the Blast Furnace. By WILLIAM KENT, M.E.,

206 The Nickel Ores of Orford, Quebec, Canada. By W.E.C. Eustis, A.B., S.B., 209 On the Manufacture of Artificial Fuel at Port Richmond, Philadelphia. By E. F. LOISEAU,

214

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