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Features

The President's Message on the Panama Canal

Present Condition of the New York Tunnels

William Henry Welch

By Marous Benjamin

Catechism of a Scientist

The "Unilens" a Novel Form of Telescope

By the English Correspondent of the Scientific American

The New Lusol Lamp

By Jacques Boyer

A Simple Experimental Dynamo

By Paul H. Woodruff

The Solution of New York's Transportation Problem

The Apparatus of the United States Life-Saving Service

By Waldon Fawcett

Eye-Spotting in Nature

By Percy Collins

Increasing the Power of a Talking Machine by Means of Compressed Air

Business and Personal Wants

READ THIS COLUMN CAREFULLY--You will find inquiries for certain classes of articles numbered in consecutive order If you manufacture these goods write us once and we will send you the name address of the party desiring the information. In every case it is necessary to give the number of the inquiry

Departments

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    Correspondence

  • Recently Patented Inventions

  • Notes and Queries

  • Index of Inventions

  • New Books, Etc.

  • Patents

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