Automatic Saw Filing Machine, Essence of Disease

Arctic and Antarctic Oceans

Practical Suggestions on Tanning Leather

Illuminating Gas-What it is, and How it is Made

Design for a Block of Six Dwellings

Progress of the Velocipede

Intermediate Bearing Pulley for Short Belts

Hutton's Patent Automatic Sash Lock

On the Poisonous Effects of Bisulphide of Carbon, and its use for the Extermination of Animals Living Underground

Solution

The New Administration

Drowsiness and Remedies For it

The Sum of All the Motions in the Universe

Periodical Scientific Publications

Connection on English Railway Trains

Scenting, Deodorizing, and Ventilating

Protection Considered as a Conservative Element in National Affairs

Education of Idiots

Editorial Summary

Manufacturing, Mining, and Railroad Items

Answers to Correspondents

Recent American and Foreign Patents

Official List of Patents

Issued by the United States Patent Office

New Publications