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A Scientific City

Inside a Lighthouse


By R. Wood Brown


Sagnes' Machine for making Moulds for Objects in Copper and Bronze

Meinesz's Compressed Air Dredging Apparatus

Drainage of Large Marshes

By C. E. Hollister

The Cost of Steam Power

By Charles E. Emery

Forged Steel Wheels

The Hull and Barnsley Railway Swing Bridge

American and English Freight Cars

The Cable Railways of Chicago.—Some of the Difficulties and Objections to their use in Crowded Cities

Ceramic Photography

By A. L. Henderson

Relief Printing Blocks from Photographs

Division of the Weight Unit

The Dendrometer.—An Instrument for Measuring Heights of Trees

The Decay of Building-Stones

The Baume Hydrometer Scale

By John Tagliabue

The Magnetic Balance

By D. E. Hughes

Radiguet's Electric Light Apparatus

The New Morphological Element of the Blood

The Eruption of Krakatoa

Notes on New Caledonia

Rare Fishes

Trout and Trout Culture

By R. A. Koss

Experiments on the Colors of Gems

On the Condensation of Gases



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March 22, 1884

Science for the Modern World