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Scientific American Magazine Vol 92 Issue 13

Scientific American Magazine

Volume 92, Issue 13

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Features

Casualties--Military and Civil

“Consigned to the Scrap Heap”

The George Washington University

N. Monroe Hopkins

Electric Railways and Population

The Current Supplement

The Progress of Aviation Since 1891

Cables that Withstand 90,000 Volts

A Simple Rim for Detachable Tires

A Swimming School for Cavalry Horses

W. G. Fitz Gerald

A Home-Made Wireless Signaling Transmitter

A. Frederick Collins

Salt Making on San Francisco Bay

Enos Brown

The Barossa Dam, Southern Australia

Emile Guarini

The New Blackwell's Island Bridge

Patent Department

An Ink-Controlled Fountain Drawing and Writing Pen

Lineman's Support

Hose Coupling

Rail-Joint Connection

Railway Gage

Oddities in Invention

The New Trade Mark Law

Business and Personal Wants

Departments

The Heavens in April - April 1, 1905

Correspondence - April 1, 1905

Notes and Queries - April 1, 1905

Recently Patented Inventions - April 1, 1905

Index of Inventions - April 1, 1905