Volume 30, Issue 4
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Features
The Utilization of Iron Pyrites
New Iron Alloys
To Our Friends
Auguste De La Rive
Death in the School Room
Scientific and Practical Information - January 24, 1874
The Centennial Tower One Thousand Feet High
Recent Iron Bridge Construction
Wardwell's Adjustable Bench Jack
A Simple Freezing Machine
Improved Cooking Vessel
Improved Mallet
A Modern Orchid House
Decisions of the Courts - January 24, 1874
United States Circuit Court---District of Connecticut.
The New Exploration of the Amazon River, by Professor Orton.—Over the Andes
No. 7