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Recent Decisions Relating to Patents

Chaudiere Bridge, Ottawa

Furnaces for Destroying the Refuse of Cities

On the Stability of Certain Merchant Ships

Air Regulator for the Air-Chambers of Pumps

Improved Canal Dredger

Apparatus for Conditioning Fibrous Materials

Aerial Navigation and its Possibility

By Tim. Choinski

The Stevens Institute of Technology, Hoboken, N. J.—Opening of the New Workshop

The Future Development of Electrical Appliances

By John Perry

Boston Artesian Well

Lake Tanganyika

The Theory of the Photophone

How is Petroleum to be Examined?

By F. Skalweit

How we are Poisoned

The Action of Certain Organic Substances upon the Rose Color Produced by the Solution of Platinic Iodide in Potassic Iodide

By Frederick Field

On Nitrification

On Ozone

On the Attenuation of the Virus of Chicken Cholera

By L. Pasteur

Micropathy

By Jno. W. Maclean

A Curious Result of Mental Derangement

The Ferns of the Pacific Coast

The Grass Crop

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