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Recent Decisions Relating to Patents

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

Expansion Sleeve Coupling

A New Trap

Laying and Repairing Submarine Telegraph Cables

Division of the Electric Light

The Dent Chronograph

Mercadier's Researches on the Photophone

Tele-Photography

Determination of Colors by Rotatory Disks

By A. Rosenstiehl

The Purification and Softening of Water

Hydrophobia Five Years After Inoculation

On the Law of Avogadro and Ampere

Early Dentistry

Sea Sickness

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    May 14, 1881