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Method for Purifying Hard Water

What is the Cause of Honey-Dew?

Parce's Hoisting Crane

Cannel Coal and its Oils

Corns and Chilblains

A Flying Trip to the West

Abstract Science and Philosophy

Canadian Lake and Ocean Navigation


The Scientific Association


Steamboat Disasters

To Keep Grapes Fresh

Hot-Air Ovens for Iron Furnaces

Grain and Rice Hulling Machine

Reaping-Machine Trial--Letter from Mr. McCormick

Hooper's Improved Steam Boiler

How the Pyramids Were Built


Improvement in Making Oil of Vitriol

New York Artificial River

Roofing the Victoria Bridge

To Cleanse Wool for Home Use

A Column of Interesting Varieties

Manufacture of the Otto of Roses

Safety for Steamboats

Improved Broadcast Seeding Machine

Sugar-Cane Mills

The Old Earth

Navigating the Air

Hard India-Rubber

Richard Cobden & American Mechanics

Deflection of Girders Under Different Speeds

Steam Boiler Explosions

The Cotton Crop

Foreign Summary—Metals and Markets

Weekly Summary of Inventions

Patent Claims

Issued from the United States Patent Office

Improved Life-Saving Raft

New Falling Rack for Mangers

Large Specimens of Titanium


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    Notes and Queries

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