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Decisions Relating to Patents - December 10, 1887

French Disinfecting Apparatus

Benier's Hot Air Engine

Your Future Problems

By Charles E. Emery

Heating Marine Boilers with Liquid Fuel

The Change of Gauge of Southern Railroads in 1886

By C. H. Hudson

Torpedo Boats for Spain

The Spanish Cruiser Reina Regente

Film Negatives

How Different Tones in Gelatino-Chloride Prints may be Varied by Developers

Note on the Construction of a Distillery Chimney

The Production of Oxygen by Brin's Process

An Electrical Governor

The Electric Current as a means of Increasing the Tractive Adhesion of Railway Motors and other Rolling Contacts

By Elias E. Ries

Electric Launch

The Commercial Exchange, Paris

The Manufacture of Cocaine

The Chemical Basis of Plant Forms

By Helen C. De S. Abbott

Synthesis of the Alkaloids

New Method for the Quantitative Determination of Starch

By A. V. Asboth

A Group of Hampshire Downs

The Yale College Measurement of the Pleiades

Building Plans and Specifications

Deep Sea Dredgings: Examination of Sea Bottoms

By Thomas T. P. Bruce Warren

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