TERMS FOR THE SCIENTIFIC AMERICAN.
| One copy, one year, postage included | $3 20 |
| One copy, six months, postage included | 1 60 |
Clubs.—One extra copy of The Scientific American will be supplied gratis for every club of five subscribers at $3.20 each; additional copies at same proportionate rate. Postage prepaid.
Single copies of any desired number of the Supplement sent to one address on receipt of 10 cents.
Remit by postal order. Address
MUNN & CO., 37 Park Row, New York.