Scientific American Magazine Vol 148 Issue 4

Scientific American Magazine

Volume 148, Issue 4

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Features

The Economics of Man-Made Weather

Willis H. Carrier

'Safety Lanes' for Motor Safety

A. P. Peck

Machines That Think

Thomas Ross

Melting Glaciers Supply Electricity

The Most Perfect Milk Possible

O. Erf

Building Model Stars

With a Glimpse at a Laborious Indoor Sport of the Mathematician-Astronomer

Henry Norris Russell

What is 'Telepathy'?

Watchmen Of Our Coast Line

Randolph Ridgely Jr.

Preserving Proof of Invention

Adequate Evidence of the Date of Conception Will Aid the Inventor if His Claims to Priority Are Contested

The Glory of Persian Art

Hidden as the Result of a Drunken Orgy; Uncovered by American Archeologists

The Truth About High-Altitude Flight

W. H. Whevers

More Amateurs' Telescopes

What Happens in a Grain Elevator

When Lacquer and Fabric Meet

Departments

Across the Editor's Desk, April 1933

Back of Frontispiece, April 1933

A Carillon Which was Hoisted by Tractor

Our Point of View, April 1933

Misconceptions on Ramie Fiber, New Fertilizer from Peat and more

Patent Office Catching Up, "Germania" a Geographical Mark and more

Books Selected by the Editors, April 1933