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Features

Bentley's Hay-Loading Machine

The Most Important American Discoveries and Inventions

Miscellaneous Summary

Polytechnic Association of the American Institute

New Experiments in Working Steam Expansively

Special Notice

The Drill and its Office

Patent Extension Schemes

Spare the Centers

Water as Fuel

Mudsills

The Dictator.

Coppering Iron Ships

New Books and Publications

Recent American Patents

Patent Claims

To Our Readers

Patents Granted for Seventeen Years!

Rates of Advertising

The Cheapest Mode of Introducing Inventions

Chesney's Sorghum Evaporator

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    Correspondence

  • Notes and Queries

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