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Hon. Benjamin F. Tracy, Secretary of the Navy

Masonry Bridges with Semi-Free Joints

The Construction of Race Courses

By F. B. krause

H. M. First-Class Cruiser Gibraltar

Detecting Water in Petroleum Tanks

Electric Meters, Motors, and Money Matters

By W. E. Ayrton

The Technology of the Paper Trade

The Electric Organ of the Raia Torpedo

Protection of Telephone Lines against Induction

By Dollivo Von Dobrowollsky

Apparatus for Examining the Cavities of the Face by Electric Light

The Blended Tocci Brothers, of Locana, Italy

By Robert P. Harris

The Tocci Twins


Soiree of the Royal Society

A Century of American Weeds

Their Root Systems Tabulated

By Byron D. Halsted

Musk Seeds

Protea Nana

Useful Engineering Books

Death Watches


The Scientific American Supplement. Index for Vol.33


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