Scientific American Magazine

Improved Screw and Stud Machinery

Science Familiarly Illustrated

Treatment of Animal Refuse in Europe

Editorial Summary

Application of the Lever Escapement

Recent American and Foreign Patents

Answers to Correspondents

New Publications

Extension Notices

Swift's Sash-Weight Attachment

Hutton and Mee's Improved Blind Rod

Caution

A Word About Almanacs

The Value of Mechanical Skill in the Arts

The Teredo, or Ship Worm--Important Trial

Gravel and Cement Mining

Patent Claims

Scientific American

Increased Force in the Patent Office

Correspondence

Business and Personal