Volume 30, Issue 7
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Features
Microscopic Crystals in Plants
Velocity of Nervous Impulses
The Autopsy of Professor Agassiz
The Fireless Locomotive
The Death of Dr. Livingstone
The Origin of the Diamond
Steam Boiler Explosions.—The Work Accomplished by the United States Commission
Allan's Floating Batteries and Saloons
Improved Wood Screw
Captain Galton's Ventilating Fireplace
How Greenbacks are Cancelled
Drawing and Sketching--Practical Hints and Recipes
Scientific and Practical Information - February 14, 1874
About Ourselves
Barker's Heating and Ventilating Apparatus
Monson's Improved Auger
Improved Gaining Machine - February 14, 1874
Self-Pumping Well-Boring Drill
Improved Wash Boiler
The Australian Fever Tree
Decisions of the Courts - February 14, 1874
United States Circuit Court—District of Massachusetts
How Shall I Introduce my Invention?
Recent American and Foreign Patents - February 14, 1874
Answers Correspondents - February 14, 1874
Communications Received - February 14, 1874
Canadian Patents - February 14, 1874
List of Patents Granted in Canada, January 23, 1873