The

Scientific American Supplement.

PUBLISHED WEEKLY.

Terms of Subscription, $5 a Year.

Sent by mail, postage prepaid, to subscribers in any part of the
United States or Canada. Six dollars a year, sent, prepaid, to any
foreign country.

* * * * *

All the back numbers of THE SUPPLEMENT, from the commencement, January
I, 1876, can be had. Price, 10 cents each.

* * * * *

All the back volumes of THE SUPPLEMENT can likewise be supplied. Two
volumes are issued yearly. Price of each volume, $2.50, stitched in
paper, or $3.50, bound in stiff covers.

* * * * *

COMBINED RATES--One copy of SCIENTIFIC AMERICAN and one copy of
SCIENTIFIC AMERICAN SUPPLEMENT, one year, postpaid, $7.00.