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

Features

The Sponge Fisheries of the Bahamas

By J. F. Coonley

Economy of Flight

A Portable Hot Water or Steam Heater

A Wagon Maker's Spoke Puller

An Electric Lamp Cover and Switch

A Continuous Driving Ratchet Drill

A Design for Easels and Other Stands

An Improved Typewriting Machine

An Improved Churn

The World's Fair Lumber and Forestry Building

A Steam Engine Slide Valve

Largest Dry Dock on the Great Lakes

Some Suggestions in Photography

By M. Hopkins

Departments

  • Letters

    Correspondence- November 21, 1891

  • Recommended

    New Books and Publications- November 21, 1891

  • Departments

    Business and Personal- November 21, 1891

  • Notes and Queries- November 21, 1891

  • Recently Patented Inventions- November 21, 1891

  • To Inventors- November 21, 1891

  • Index of Inventions- November 21, 1891

  • Patents- November 21, 1891

Purchase To Read More

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