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The Four-Day Liner

Three Months of Denatured Alcohol

Theory and Practice

The Scientific American Gold Medal for Safety Devices

The Current Supplement

The Evaporation of Solid Metals and their Compounds

A Great Ice Jam on the Susquehanna River

A Combined Sleeper and Chair Car

A Time-Controlled Phonograph

The Construction of a Magnetic Detector

By Edward G. Gage

A Continuous Variable-Speed System of Rapid Transit

How Church Bells are Cast

By F. P. Lotz

A Babylonian Vase Inlaid with Ivory and Precious Stones Dating from 4500 B. C

By E. J. Banks

The Gyroscope as a Compass

By A. Frederick Collins

A Lecture Room on a Railroad Train

By Katherine Louise Smith

An Unsinkable Motor Lifeboat

By L. Ramakers

A Wire Rope Railway Used in the Construction of an Italian Fortress

By Alfred Gradenwitz


  • Departments

    Recently Patented Inventions

  • Index of Inventions

  • Notes and Queries

  • Patents

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April 06, 1907

20% Sitewide for President's Day