| TABLE OF CONTENTS. |
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| I. | BIOGRAPHY.—George W. Whistler, C.E.—ByProfessor G.L. VOSE.—Full biography of the eminent railroadengineer. |
| II. | CHEMISTRY.—A Newly Discovered Substance inUrine.—A substance possessing greater reducing power thangrape sugar found in diabetic urine. |
| On Electro Dissolution and its Use as RegardsAnalysis.—By H. N. WARREN, researchanalyst.—Interesting decomposition of cast iron withproduction of boron and silicon; experiments with other metals. |
| III. | ELECTRICITY.—No Electricity from theCondensation of Vapor.—Note on Herr S. Kalischer'sconclusions. |
| On Nickel Plating.—By THOMAS T.P. BRUCEWARREN.—Notes on this industry, and suggested improvement forprocuring a bright coat. |
| The Electro-Magnetic TelephoneTransmitter.—New theory of the telephone's action. |
| IV. | ENGINEERING.—Fuel and Smoke.—By Prof.OLIVER LODGE.—The second and concluding one of theseimportant lectures. |
| Gas Engine for Use on Railroads.—Theapplication of six horse power Koerting gas engine to a dummylocomotive.—1 illustration. |
| New Gas Holder at Erdberg.—The largest gasholder out of England.—3 illustrations. |
| Tar for Firing Retorts.—Simple arrangementadapted for use in ordinary gas retort benches; resultsattained.—1 illustration. |
| The Anti-Friction Conveyer.—An improvementon the screw of Archimedes; an apparatus of wonderful simplicityand efficacy in the moving of grain.—2 illustrations. |
| The Retiro Viaduct.—Combined iron and stoneviaduct over the river Retiro, Brazil.—5 illustrations. |
| Western North Carolina Location over the BlueRidge.—Interesting instance of railroad topography.—1illustration. |
| V. | METALLURGY.—Chilled Cast Iron.—Thevarious uses of this product; adaptability of American iron for itsapplication. |
| VI. | MISCELLANEOUS.—Coal in the ArgentineRepublic.—Note. |
| History of the World's PostalService.—Conclusion of this interesting article.—Theservice in Germany, China. Russia, and elsewhere.—10illustra ...
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