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Condensers for Steam Engines

By J. H. Kinealy

The Eiffel Tower at the Paris Exhibition

The Canalization of Rivers

Electric Locomotive for Mines

Some Recent Developments in Artificial Illumination

By Henry Morton

The Latest Development of Roller Flour Milling

By Henry Simon

Horse Shoe for Soft Ground

Improved Wheel Chill

Light and Color

By W. De W. Abney

Rivets

Favorite Numbers

By Albert Williams

Amphitrite—An Optical Illusion

The Aurora Borealis

Gymnastic Exercises and Apparatus

The Strophanthus

Strophanthus and Strophanthin

Biographical Sketch of Chesley Heal, 1778-1888

Strophanthus as an Anæsthetic

Useful Engine ering Books

Building Plans and Specifications

Departments

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March 16, 1889

Help Us Reforest the Mississippi River Valley

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