How We Stand and Walk
Abstract of a Lecture Delivered before the American Institute by Prof. Bart G. Wilder.
Manufacture of Saws in Sheffield
Condensed from The Ironmonger.
Improvement in Water Wheels
Perpetual Motion- January 7, 1871
Implement for Grinding Valves
The Hail-Storm of June 20, 1870
What Causes Aurora Borealis?
Eastern Long Island--Menhaden Oil and the Fisheries
Sag Harbor, Dec. 9, 1870.
Chubbuck's Patent Piston and Packing
Improved Self-Locking Stove Leg
Booton's Shot Case and Distributer
Where is the Limit of Invention?
The Profession of the Mechanical or Dynamical Engineer
The Mont Cenis Tunnel Completed
Spiritualism and Science
Waste Liquors of Paper Mills
Queries- January 7, 1871
We present herewith a series of inquiries embracing a variety of topics of greater or less general interest. The questions are simple, it is true, but we prefer to elicit practical answers from our readers.
1871 Special Club Premium.
Alloy of Lead and Platinum
Recent American and Foreign Patents- January 7, 1871
Applications for Extension of Patents- January 7, 1871
Answers to Correspondents- January 7, 1871
Official List of Patents- January 7, 1871
Issued by the U. S. Patent Office for the Week Ending Dec. 27, 1870. Reported Officially for the Scientific American.
Correspondence- January 7, 1871
Business and Personal- January 7, 1871