We use cookies to provide you with a better onsite experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy.

Skip to main content

    Features

    The Cere Viaduct, Railway Economy

    On Tin

    By Charles A. Joy

    The Century Plant

    By John Ramsay Gordon

    On a New Method of Straightening High Chimneys

    J. D. Michael's Patent Egg Box

    Working Millstones With an Air Blast

    William's Improved Tracelock

    Apparatus for Purifying the Air

    By the Evaporation of Coal Tar, Pitch, Carbolic Acid, Phenic Acid, or Any other Disinfectant for Apartments, or Hospitals

    By C. Widemann

    Platinized Looking-Glasses

    By C. Widemann

    L. S. Clark's Improved Shaft-Bar for Single Sleighs

    Spring Balance for Chemicals

    An Inexplicable Power

    Wood Engravings

    Inertia and Vis Inerti

    Hardening and Tempering Steel

    Lockage Waste on Our Canals

    The Water Wheel Tests at Lowell

    Restrictions on the Weighing of Coal

    Answers to Correspondents- March 12, 1870

    Recent American and Foreign Patents- March 12, 1870

    Official List of Patents- March 12, 1870

    Departments

    • Letters

      Correspondence- March 12, 1870

    • Recommended

      New Books and Publications- March 12, 1870

    • Departments

      Business and Personal- March 12, 1870

    Purchase To Read More

    Already purchased this issue? Sign In to Access
    Select Format
    March 12, 1870

    See the World from a Different Perspective

    Subscribe to Scientific American MIND

    Subscribe