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SCIENTIFIC AMERICAN SUPPLEMENT NO. 324




NEW YORK, MARCH 18, 1882

Scientific American Supplement. Vol. XIII, No. 324.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


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TABLE OF CONTENTS.

I. ENGINEERING AND MECHANICS--Machine Tools for Boiler Makers.
2 figures.--Improved boiler plate radial drill.--Improved
boiler plate bending roller.

Modern Ordnance. By COLONEL MAITLAND.--Rifled cannon.--Built