
Volume 41, Issue 1066supp
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Features
Machines for Composing Letterpress Printing Surfaces
Compound Marine Boilers
An Old Newcomen Steam Engine
Economy of Mechanical Traction for Street Railways
The Link Movement Engine
Honigmann's Method of Boring Mine Shafts
Selected Formulæ
The Toning of Bromide Prints
Engineering Notes
Electrical Notes
Miscellaneous Notes
Automatic Firing Guns
II. —INTRODUCTION OF RIFLING.
The Bessemer Process Again —Reply of Joseph D. Weeks to His Critics
To the Editor of the SCIENTIFIC AMERICAN :
The Chemical Laboratories of Germany
HISTORIC LABORATORIES.