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The Sea-Side Zoological Laboratory at Naples

The Progress of the Fur Trade

Michel Chasles

New Method of Raising Sunken Vessels

By W. Raydt

Preliminary Report upon the Improvement of the Navigation of the Missouri River

By R. Suter

The Institution of Naval Architects

The Hydraulic Machinery Applied to Operating the Lock Gates of the Des Moines Rapids Canal

A New Trap

Laying and Repairing Submarine Telegraph Cables

Expansion Sleeve Coupling

Division of the Electric Light

Mercadier's Researches on the Photophone

The Dent Chronograph

Determination of Colors by Rotatory Disks

By A. Rosenstiehl


Hydrophobia Five Years After Inoculation

The Purification and Softening of Water

On the Law of Avogadro and Ampere

Sea Sickness

Early Dentistry


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    May 14, 1881

    20% Sitewide for President's Day