[Illustration]




SCIENTIFIC AMERICAN




A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS,
CHEMISTRY, AND MANUFACTURES.




NEW YORK, JANUARY 1, 1870.

Vol. XXII.--No. 1. [NEW SERIES.]

$3 per Annum [IN ADVANCE.]


* * * * *

Contents: (Illustrated articles are marked with an asterisk.)

*Engines of the Spanish Gunboats

The Torpedo Problem