, postal order, or registered letter.

ADDRESS MUNN & CO., 37 PARK ROW, N. Y.

SCIENTIFIC AMERICAN EXPORT EDITION.

The SCIENTIFIC AMERICAN Export Edition is a large and splendid
periodical, issued once a month. Each number contains about one
hundred large quarto pages, profusely illustrated, embracing: (1.)
Most of the plates and pages of the four preceding weekly issues of
the SCIENTIFIC AMERICAN, with its splendid engravings and valuable
information; (2.) Commercial, trade, and manufacturing announcements
of leading houses. Terms for Export Edition, $5.00 a year, sent
prepaid to any part of the world. Single copies 50 cents.
Manufacturers and others who desire to secure foreign trade may have
large, and handsomely displayed announcements published in this
edition at a very moderate cost.

The SCIENTIFIC AMERICAN Export Edition has a large guaranteed
circulation in all commercial places throughout the world. Address
MUNN & CO., 37 Park Row, New York.

VOL. XL., NO. 13. [NEW SERIES.] _THIRTY-FOURTH YEAR_.

NEW YORK, SATURDAY, MARCH 29, 1879.

* * * * *

CONTENTS.

(Illustrated articles are marked with an asterisk.)

Africa crossed again 193
Aluminum 197
Barometer, aneroid 201
Bolt, door, improved* 198
Bread, snow-raised 199
Buffalo, domestication of the 197
Carpet beetle, remedy for the 195
Chimney flues 198
Clocks, pneumatic 196
Cooper, Peter, as an inventor 193
Crusher, ore, novel* 194
Electricity, statical, phenom. in 194
Flour, banana 195
Furnace, imp., for burn'g garbage* 198
Hardware, English & American 201
Ice cave of Decorah, Iowa 196
Inventions, new agricultural 199
Iron, advance in 201
Light, albo-carbon 201
Magnetism, curious facts in