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Features

The Dinosaur Beds of the Grand River Valley of Colorado

By Elmer S. Briggs

Mosquitoes Attracted by Sounds

The Muskrat—Principal Fur Producer in America

Sound Experiments in a Balloon

The Principal Vegetable Products of the Hawaiian Islands

The Incandescent Electric Lamp–How Manufactured and Tested

By William A. Del Mar

Industrial Triumphs of Electrochemistry

By Samuel Sheldon

London's Latest Census

New Railroads in Switzerland

Loss of Life in the United States by Lightning

Science in the Theater

Forerunners of Modern Inventions

St. Mark's and St. Antonio's

Ten-Ton Hydraulic Graving-Dock Crane

Charlier Oil-Fuel Brass-Furnaces

Borax and its Manufacture

Lac and the Art of Lacquering

Weights and Measures used in the Philippines

Artificial Silk

Chabiwnnet Process of Making it

Machine for Testing Bicycle Hubs

A Steam Automobile of Novel Design

Portable Folding Stairs

Protection against Burglars

Food as Building Material and Fuel

By W. O. Atwater

Selected Formulæ

Trade Suggestions from United States Consuls

Patents!

Trade Notes and Recipes

Departments

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    May 24, 1902

    Beyond XX and XY

    Biology. Identity. Equality.