[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