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Features

Influence of Electricity upon Plants

The Working of an Electrolytic Copper Refinery

By G. Gore

High Power Batteries

A Six Inch Quick Firing Gun

Improved Rope Railway—Aerial Carrier at the Laudun Sugar Works

Center Board Yachts on the Clyde

Paint Oils

A Chronometer giving the 1/1000 Of a Second

History of the Cotton Industry

A Concentrated Rapid Hydroquinone Developer

A Detective Photographic Camera

Combined Toning and Fixing Bath

Lippmann's Experiments in Photographing Colors

The New York “World”

Curious Musical Instruments

Exhibition at Budapest

African Notes

Adiabatic Compression and the Velocity of Sound

By Henry A. Mott

Memory

By J. O. Hirschfelder

A New Method of Embalming and Preserving Animal and Vegetable Tissues

Pharmaceutical Etymology

Protection of the Apple Crop

The Culture of Figs

By W. F. Massey

Fertilizers

Outline of the History of Commercial Fertilizers

Building Plans and Specifications

To Remove Tannin from Tea

By H. Grimshaw

A New Method of Testing Honey

By Oscar Haknlk

Useful Engineering Books

Extraction of Borax in California

Departments

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    Patents- June 13, 1891

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June 13, 1891