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The New First-Class Japanese Battleship “Kashima.”

By Harold J. Shepstone

Cement Posts

By C. L. Catherman

Patina and its Chemistry

By Otto N. Witt

Friction Clutches

By George A. F. Pover

A Machine for Testing Springs

The Motor Spring and its Calculation

The Structure of the Atom

Occupations of the Philippine Islanders

The Standardization of Chemical Analysis

Railway Rate Regulation: Its Bearing upon Public Transportation

By James L. Cowles

A New Single-Phase Railway Equipment

By A. Frederick Collins

A California Hop Garden

By Janet Macdonald

Education of the Philippine Tribes

The Skins of Fur-Seals

By Charles H. Stevenson

Similarity of Greek and Nippur Pottery

By Clarence S. Fisher

Musical Instruments: Their Construction and Capabilities.—I

By A. J. Hipkins

Selected Formulæ


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    April 22, 1905

    20% Sitewide for President's Day