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Features

The Mont Cenis Tunnel

On the Inflammability of Petroleum and Schist Oils

What Makes the Difference

Ross' Patent Oil or Tallow Cup

Engraving for Calico Printing

Middleton & Haller's Safety Horse Hitch

Repeating Fire-Arms

Design for Toilet Table

Types-What Machinery Can Do

From the New York Mail

Editorial Summary

Answers to Correspondents

Recent American and Foreign Patents

Tact--What is it?

New and Important Patent Office Rule

Our “Greasy Mechanics”--Who and What Are They?

Strength in Buildings and its Appearance

Preservation Of Wood--Prevention of Decay

The Sugar Business in Cuba

Patents and Claims

Issued by the United States Patent Office

On Some Constituents of Cotton Fiber

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Know Before You Vote