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The Use and Economy of Gas Engines

Our Leather Industry

Railway Inventions Wanted

The “City of Puebla”

Improved Furnace Feeder

Improved Railroad Spike

Improved Sash-Cord Guide

American Industries--No. 81

Hemlock Sole-Leather Tanning

Improved Circular Sawmill

Mechanical Inventions

New Automatic Pencil

Improved Quartz Stamper

Engineering Inventions


  • Departments


  • New Inventions

  • Recent Inventions

  • Index of Inventions

  • Business and Personal

  • Notes & Queries

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