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Features

Improved Cooking Vessel

New Double Spindle Drill

The Preparation of Gelatin

The Spectroscope Simplified

Thick Cylinders

Pneumatic Foundations

The Digestive Apparatus

Freight Business of New York City Across the North River

Scientific and Practical Information

The American Institute Fair

The Chicago Inter-State Industrial Exposition

Silkworms

Improved Plow

Iron Ship Construction

A New Preventive for Slipping Belts

Lock Envelope

Tanite Emery Grinder with Adjustable Table

Improved Spindle Step

Car and Passenger Elevator

Sanitary Notes--Milk and its Adulterations

Recent American and Foreign Patents

Answers Correspondents

Communications Received

Departments

  • Departments

    Correspondence

  • Business and Personal

  • Notes and Queries

  • Index of Inventions

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June 21, 1873

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