Volume 30, Issue 25
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Features
The Horse in Market
How to Treat Fruit Trees
Water as Fuel
Coffee Grounds
Everybody's Centennial
Steep Gradients
The American Museum of Natural History
A New Domestic Steam Engine
Dr. Marey's Chronograph
May's Patent Butter Worker
Practical Mechanism - June 20, 1874
Number II. Side Rake
Improved Punch and Screwdriver
Improved Hammer
Remarkable Balloon Ascent
A Microscopic Aquarium
Decisions of the Courts - June 20, 1874
United States Cireuit Court-District of Massaehusetts
Recent American and Foreign Patents - June 20, 1874
Answers Correspondents - June 20, 1874
Communications Received - June 20, 1874
Canadian Patents - June 20, 1874
List of Patents Granted in Canada May 19 to May 28 1874