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Improvement in Hand-Power Sawing Machines

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


The New Temple Emanuel

Patents and Claims

Isued by the United States Patent Office



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September 30, 1868

Of Shamrocks and Science

Happy St. Patrick’s Day