Volume 15, Issue 7
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Features
Notes on Boilers
Foreign Scientific News
Thunder Storms--Protection Against Lightning
The Markets
New Publications
Birdsall's Pulley
The Atlantic Telegraph
Toshach's Sash Support
Success the Popular Estimate of Value
The Charges of the Atlantic Telegraph Company
An Absurd Tool
Important Decision--Extension of Tanners's Car-Brake Patent
Patent Claims
Issued from the U. S. Patent Office