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Compound Metallic Columns and Connections

How to Test for Vanadium, and What We Know of the Metal

Government Pap for Austria

The Temperature Required for Ignition

The Promotion of Scientific Research

The Mystery of the Injector

The Great Sewing Machine Job before Congress

The Use of Arsenic Colors

Submarine Diving

Professor Tyndall's Fourth Lecture in New York--Polarized Light

Gleanings in Science and Art

Animal Charcoal and Its Use in the Refining of Sugar

Valved Oil Can Nozzle

Saw Clamp


New Tunnel Under the Harlem River, New York City

Three Cylinder Engine

Engineering Notes

The Government Submarine Works at Hell Gate

Nascent Elements as Fertilizers

A Typo-Statue to Horace Greeley

Scientific and Practical Information

Scientific and Mechanical Possibilities

Patent Office Decisions

Recent American and Foreign Patents

Answers Correspondents

Communications Received


  • Departments


  • New Books and Publications

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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January 25, 1873