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Features

Improved Water Ballast Steam Road Roller

Steam Navigation

The Hawkesbury Bridge, Australia

New Additions to the French Navy

The Reproduction of Negatives

By W. H. Rau

The Propelling Machinery of Modern War Vessels

The Projected Railway from Winnipeg to Hudson's Bay

A New Method of Measuring the Time of Exposure Given by Photographic Shutters

Photographic Notes

Improving Defective Negatives

Apparatus for Dyeing, Cleaning, and Bleaching Textile Materials

Distillation of Peppermint

By Albert M. Todd

Yellow Prussiate of Potash

The Photometry of Color

Microscopical Measurements

Effects of Food Preservatives on the Action of Diastase Pancreatic Extract and Pepsin

By Henry Leffmann and William Beam

Norfolk Island and its Resources

By Isaac Robinson

Geology

Introductory

By Archibald Geikie

Coal, Asphalt, and Petroleum Deposits in Venezuela

A Study on Whirlwinds

Fungus Diseases in Plants–Their Treatment

Building Plans and Specifications

Refrigerating Mixtures Obtained with Solid Carbonic Acid

By L. Cailletet and E. Colardeau

Departments

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August 11, 1888

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