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The Graphophone and Phonograph

Reducing the Density of Negatives by Various Agents

By Charles Ehrmann

Electric Lighting in America

By George Forbes

Covered Reservoirs

Ancient Covered Reservoirs

By Chas. H. Swan

On Variable Load, Internal Friction, and Engine Speed and Work

By Robert H. Thurston

The Relative Merits of the Various Types of Steam Boilers

The Great Lakes

Nature's Barometers

Filtration with Filters of Metallic Felt

By Charles E. Munroe

The History of a Scientific Doctrine

By S. P. Langley

On Tortoise (Chrysemys Picta) with Two Heads

By E. H. Barbour

The Geiser-Thingvalla Collision

Some Experiences with Birds

Statue of Buddha

A Botanical Atrocity

By Miller Christy

How Plants are Fertilized

High Meteorological Stations

Useful Engineering Books

Building Plans and Specifications


  • Departments

    Patents - October 27, 1888

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