Volume 13, Issue 9
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Features
The Oil Regions of Pennsylvania
Notes on New Discoveries and New Applications of Science
Commencement of Polytechnic College of Pennsylvania
Miscellaneous Summary
Breaking of the Atlantic Cable
Recent American Patents
Twenty Years Ago.--Volume I., Number 1
The Way the Distance was Measured to the Fault in the Atlantic Cable
The Expansion Controversy
Patent Claims
Issued from the United States Patent-Office