Scientific American Magazine

April 1910

Volume 102, Issue 16

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Features

The World's Fair of the Future, Gyroscopic Effect of Revolving Aeroplane Motors and more

Engineering, Electricity, Science

The "Viking"—Self-Dumping Deck Scow

By the English Correspondent of The Scientific American

Halley's Comet at its Brightest

Henry Norris Russell

The Mercury Vapor Lamp and its Effect on the Eye, The Current Supplement and more

Effect of Rainfall on the Cotton Industry

Government Irrigation in the Yakima Watershed--The Tieton Canyon Canal

Day Allen Willey

Macrographic Examination of Metals, Big Fir Trees of the Northwest

How Gamblers Cheat

Hereward Carrington

The Transformation of Sea Water into Fresh Water

How to Repair and Clean Typewriters

Louis A. Flemming

How to Cut Threads Without a Screw-Cutting Lathe or Thread-Chasing Tool

John Bergstrom

Handy Man's Workshop

A Tool for Centering Work in a Lathe

H. D. Chapman

Simple Methods of Finding the Center of a Circle

August Mencken

How to Sharpen a Pipe Die

Alfred F. Bishop

Grooved Pulleys for Experimental Work

Chauncey W. Nieman

A “Spanish Windlass”

George H. M'entire

An Illuminated Gas Heater

F. G. Williams

The Weighting of Tool Handles

A. J. Jarman

Files and Their Uses

Homer Cloukey

How Railway Traffic is Managed

C. C. Rice