Features
Electrical Novelties
The Origin of Petroleum
The Influence of Scientific Conventions
Barr's Improvement in Centrifugal Machines
Editorial Summary
Manufacturing, Mining, and Railroad Items
New Publications
Answers to Correspondents
Recent American and Foreign Patents
Dynamite--Review of a Paper by M. Nobel, the Inventor
Uniform Standard for Bolts and Nuts-Its Adoption by the Navy Department
Street Dust Laid by the Use of Chemicals
Things Easy and Difficult
The Earthquake Term
Inquisitiveness-Our Correspondents
Official Examination of Applications for Patents
Patent Office Matters
Coppered Iron Rollers for Calico Printing
The Quality of Illuminating Gas
Ventilation
The New Temple Emanuel
Patents and Claims
Isued by the United States Patent Office
Patents
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