Volume 97, Issue 22
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Features
Train Ferries for the English Channel
National Swamp Reclamation
The Use of the Gyroscope in Connection with Airships
Electric Sunstroke
The New Bridge over the Wissahickon at Philadelphia
The Transit of Mercury
The Peters Self-Registering Electric Target for Rifle Ranges
By the English Correspondent of the Scientific American
The Enlargement and Reconstruction of Governor's Island
The Nests and Nurseries of Insects
Some Experiments with a Mirror
Combined Water Heater, Filter, and Cooler
Improved Boring Bar
Patent Department - November 30, 1907
An Improved form of Reinforced Concrete Pipe