Will the Tungsten Lamp Raise Rates? The Bunsen Centenary and more

Combating the Sleeping Sickness

The Tasteful Use of Light

Color in Artificial Illumination

Light and Shadows

Ministering to Eye Comfort by Modern Methods

Good Coal and Poor

Purchase of Coal on the Basis of Its Heating Value

Drawing the Charge--Our Cover Design, The Adoption of Greenwich Standard Time in France

Heating the Home

Methods of Providing Warmth with Proper Ventilation

Lamps of To-day

Some Recent Improvements in Artificial Light Sources

Light and Power on the Farm

Independent Electric Generating Plants

Inventing the Light of the Future

The Eye as the Ultimate Judge

Science in the Current Periodicals - April 15, 1911

In this Department the Reader will find Brief Abstracts of Interesting Articles Appearing in Contemporary Periodicals at Home and Abroad

The Inventor's Department - April 15, 1911

Simple Patent Law; Patent Office News; Inventions New and Interesting

The Current Supplement, Tipping the Shores of Hudson Bay