



Produced by Jon Niehof, Don Kretz, Juliet Sutherland, Charles Franks
and the DP Team





[Illustration]




SCIENTIFIC AMERICAN SUPPLEMENT NO. 446




NEW YORK, JULY 19, 1884

Scientific American Supplement. Vol. XVIII, No. 446.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


       *       *       *       *       *

TABLE OF CONTENTS

I.    CHEMISTRY.--Tin in Canned Foods.--By Prof. ATTFIELU.--Small
      amount of tin found.--Whence come these small particles.--No
      cause for alarm.

II.   ENGINEERING AND MECHANICS.--The Windmill.--By JAMES
      W. HILL.--The Eclipse wind.--Other wind mills.--Their operation,
      use, etc.

      The Pneumatic Dynamite Gun.--With engraving of pneumatic
      dynamite gun torpedo vessel.

      Rope Pulley Friction Brake.--3 figures.

      Wire Rope Towage.--Treating of the system of towage by hauling
      in a submerged wire rope as used on the River Rhine, boats
      employed, etc.--With engraving of wire rope tug boat.

      Improved Hay Rope Machine.--With engraving.

      The Anglesea Bridge, Cork.--With engraving.

      Portable Railways.--By M DECAUVILLE.--Narrow gauge roads
      in Great Britain.--M. Decauvilie's system.--Railways used at the
      Panama Canal, in Tunis, etc.

III.  TECHNOLOGY.--Improved Pneumatic Filtering Presses, and the
      Processes in which they are employed.--2 engravings.

      Pneumatic Malting.

      A New Form of Gas Washer