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Features

M. Krantz, Commissioner General of the Paris Exhibition

The Gallery of French Furniture

The Metallurgy of Platinum

Improved Locomotive Exhaust Chamber

Paris Exhibition Elevator

The Jablochk off System of Electric Illumination at the Paris Exhibition

The Pneumatic Process of Sinking Piles

By John W. Glenn

The Sewage System of Paris

The Pioneer Railway

New Safety Valve

Improved Feed-Water Heater

A New Form of Toothed Gearing—Elliptical Bevel Wheels

By C. W. MacCord

Making Electrotype Plates from Drawings

By Joseph Brown

The Leaching of Silver Ores at Baranca, Mexico

Sun Spot Screen for small Telescopes

By B. Templar

A New Method of Grinding Glass Specula

By Elihu Thomson

An Improved Camera Lucida

Photographic Engraving in Half-Tones

Cleaning of Glass Plates and Lenses

Professor Henry Draper's Eclipse Observations

Recent Photographic Observations of the Solar Surface

Poisoning by Paris Green

Concerning Bread

Design for an Album Cover

By E. De Zuloaga Madrid

Hygienic Congress

The Electro-Capillary Phenomena of the Human Body

From the French of E. Ouimus and Charles Legras

By E. L. Sheldon

Annual Meeting of the American Association for the Advancement of Science

Scientific Phenomena and their Relations

Magnesium Nitride

By J. W. Mallet

Chemical News Notices

The Temperature of Flames

Thermometric Scales

The Evolution of Vertebrate Limbs

The Precious Metals

Total Yield of the Earth Since the Creation

California Gold Mining

The Plows of all Nations

Utilization of Waste Products

Prize Cattle-Paris Exhibition

How to Build a Greenhouse

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