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No. 82.— THE PRESERVATION OF TIMBER BY THE USE OF ANTISEPTICS. By Samuel Bagster Boulton, C.E.
No. 83.-MECHANICAL INTEGRATORS. By Prof. Henry S. H. Slihaw, C. E.
No. 84.-FLOW OF WATER IN OPEN CHANNELS, PIPES, CONDUITS, SEWERS, ETC. With Tables. By P. J. Flynn, C.E.
No. 85.— THE LUMINIFEROUS ÆTHER. By Prof. de Volson Wood
No. 86— HAND-BOOK OF MINERALOGY; DETERMINATION AND DESCRIPTION OF MINERALS FOUND IN THE UNITED STATES. By Prof. J. C. Foye.
No. 87.— TREATISE ON THE THEORY OF THE CONSTRUCTION OF HELICOIDAL OBLIQUE ARCHES By John L. Culley, C.E.
No. 88— BEAMS AND GIRDERS. Practical Formulas for their Resistance. By P. H. Philbrick
No. 89.- MODERN GUN COTTON: ITS MANUFACTURE, PROPERTIES, AND ANALYSIS. By Lieut John P. Wisser, U S.A.
No. 90 — ROTARY MOTION AS APPLIED TO THE GYROSCOPE. By Gen. J. G. Barnard.
No. 91.— LEVELING : BAROMETRIC. TRIGONOMETRIC, AND SPIRIT. By Prof. I. O. Baker.
No. 92.— PETROLEUM : ITS PRODUCTION AND USE. By Boverton Redwood, F.I.C., F.C.S.
No. 93.— RECENT PRACTICE IN THE SANITARY DRAIN AGE OF BUILDINGS. With Memoranda on the Cost of Plumbing Work. Second edition, revised. By William Paul Gerhard. C.E.
No. 94.— THE TREATMENT OF SEWAGE. By Dr. C. Meymott Tidy.
No. 95.-PLATE GIRDER CONSTRUCTION. By Isami Hiroi, C.E.
No. 96.-ALTERNATE CURRENT MACHINERY. By Gisbert Kapp, Assoc. M. Inst., C.E
No. 97.-THE DISPOSAL OF HOUSEHOLD WASTE. By W. Paul Gerhard, Sanitary Engineer.
No. 98.— PRACTICAL DYNAMO-BUILDING FOR AMATEURS. HOW TO WIND FOR ANY OUTPUT By Frederick Walker. Fully illustrated.
No. 99.— TRIPPLE-EXPANSION ENGINES AND ENGINE TRIALS. By Prof. Osborne Reynolds. Edited, with notes. etc. by F. E. Idell, M.E.
