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Machines for Working Stone

A New Style of Pump Valve

Improved Frictional Driving Gear

Notes of a Voyage on the Nile

Sibley College Lectures.—1886-87

The Cornell University Non-Resident Lecturers in Mechanical Engineering III.—The Sale of Steam

By Chas. E. Emery

The Imperial Standard Photometer

Some Type Writers—Their Origin and Uses

By J. B. Huling

Improved Direct Acting Gas Furnace

By James Henderson

Fuel Calorimetry

By B. H. Thwaite

Photography upon Wood

An Electric Tachometer

Some Features of the Recent Earthquake

By W. J. McGee



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January 15, 1887

Confronting Common Wisdom