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An Enǵlish Water Dynamometer for Absorbinǵ 1,000 Brake Horse-power

By Frank C. Perkins

Handlinǵ Passenǵers on a Rapid Transit Railroad

Construction of a Rapid Transit Line as Illustrated by the Hudson and Manhattan Railroad

By J. Vipond Davies

Cement Sidewalk Paving

Simple Directions for Laying It

By Albert Moyer

A Few Shop Jobs on an Old Car

Hints for the Handy Man with Tools

By Herbert L. Towle

Modern Scientific Research

Its Object and Methods

By William A. Tilden

The World's Daily Weather Maps

Systems Used in Various Countries

New Physical Apparatus

Simple Instruments for the Laboratory

Illuminatinǵ Enǵineerinǵ

Its Value to the Commercial Man

By William T. Serrill

Index of Inventions


  • Letters

    Correspondence - March 25, 1911

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