You have access to SA issues and articles on Sciam through institutional access. Click here if you'd like to opt out.

You have access to Scientific American issues and magazine articles through your institution’s site license

Skip to main content


Dangers of Large Fly Wheels

An Adjustable Picture Hanger

A Machine and Hand Needle Threader

A New Electric Light Support

A Trundler for Spooled Wire

Hog Killing at the Chicago Stock Yards

How Stone is Crushed and Screened

The Manchester Ship Canal


  • Letters

    Correspondence- November 7, 1891

  • Recommended

    New Books and Publications- November 7, 1891

  • Departments

    Recently Patented Inventions- November 7, 1891

  • Index of Inventions- November 7, 1891

  • Business and Personal- November 7, 1891

  • Notes & Queries- November 7, 1891

  • To Inventors- November 7, 1891

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
Scroll To Top