Scientific American Magazine Vol 46 Issue 3

Scientific American Magazine

Volume 46, Issue 3

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Features

The Use and Economy of Gas Engines

Our Leather Industry

The “City of Puebla”

Railway Inventions Wanted

Improved Railroad Spike

Improved Sash-Cord Guide

Improved Furnace Feeder

American Industries--No. 81

Hemlock Sole-Leather Tanning

New Automatic Pencil

Mechanical Inventions

Improved Circular Sawmill

Improved Quartz Stamper

Engineering Inventions

Departments

Correspondence

New Inventions

Recent Inventions

Notes & Queries

Business and Personal

Index of Inventions