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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

Note on the Construction of a Distillery Chimney

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

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 Manufacture of Cocaine

The Commercial Exchange, Paris

The Chemical Basis of Plant Forms

By Helen C. De S. Abbott

New Method for the Quantitative Determination of Starch

By A. V. Asboth

Synthesis of the Alkaloids

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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    December 10, 1887