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A New Assistant Commissioner of Patents

Australian Progress—Melbourne

An Aid to Community Life

Clinical Study of Bacteria

By A. Clifford Mercer

Base Ball

Steam Jet Phenomena

An Early Railway

Improvement of the Port of Havre

A Theory of the Straight Stack

Steel Cross Ties for the New York Elevated Roads

The Original Bicycle

The Philadelphia Carpet Industry

The Manufacture of Nitro-Glycerine

Cold Prepared Extracts

Machine for Compressing Coal Dust

Manufacture of Chloride of Lime

By R. Hasenclever

Extraction of Gold from Ores

By T. R. Jordan

Electric Traction on Tramway and by Accumulators


By Rush Shipped Huidekopek

Battery Cells made of Paper

John Dalton

James Joseph Sylvester

The Sounding Rocks of Guildo

The Artesian Well at City Park, Davenport, Iowa

By A. S. Tiffany

The Economic uses of Flowers

By P. L. Simmonds

The Origin of Petroleum

Useful Engineering Books

Building Plans and Specifications


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