_The value of the_ SCIENTIFIC AMERICAN _as an advertising medium cannot be over-estimated. Its circulation is ten times greater than that of any similar journal now published. It goes into all the States and Territories, and is read in all the princ.i.p.al libraries and reading-rooms of the world. We invite the attention of those who wish to make their business known to the annexed rates. A business man wants something more than to see his advertis.e.m.e.nt in a printed newspaper. He wants circulation. If it is worth 25 cents per line to advertise in a paper of three thousand circulation, it is worth $2.50 per line to advertise in one of thirty thousand._

RATES OF ADVERTISING.

Back Page $1.00 a line.

Inside Page 75 cents a line.

_Engravings may head advertis.e.m.e.nts at the same rate per line, by measurement, as the letter-press_.

FOR SALE--A 9-ft. Planer, 4 Lathes, 2 Shapers, Gear Cutter, Drill Press, Fanblower, Anvils, Vises, etc., at L. DUVINAGE'S, 209 Center st., New York.

TOSELLI'S Ice Machines, Simple in operation, makking transparent ice without steam power. Address G. B. NEWMAN,33 Maiden Lane, New York.

GALVANO PLASTIC IRON--For Bank Note Printing, Books, Engravings, etc.

Patent Rights for sale by C. M. CLAY & CO., No. 45 Liberty st. Box 4950.

CANCERS, SCROFULA, and all CUTANEOUS DISEASES cured by using the

SHELDON SPRING WATER.

Book of thirty pages, with certificates, sent free. Addres J. W. BEALS, Treasurer, Boston, Ma.s.s.

AGENTS WANTED IN EVERY COUNTY of the four following States:--Illinois, Indiana, Iowa, and Wisconsin, to sell B. F. Alexander's Patent Horse Hay Fork. For particulars address HOMER DUBREE, Glen Hope, Clearfleld Co., Pa.

_IRON & WOODWORKING_

Machinery Depot. New and Second-hand. GEORGE L. c.u.mMTNGS, 140 Center st., New York.

FOR SALE

_AT A BARGAIN_,

A BABc.o.c.k & WILc.o.x ENGINE, 16-in. cylinder, 42 in. stroke, NEARLY NEW.

This Engine is to be taken out by Wm. A. Harris, and replaced by a Corliss Engine, built by him. Address

WILLIAM A. HARRIS,

Providence, R.I., or 49 Murray st., New York.

HUNTER'S GUIDE--Revised, Enlarged, New Secrets Added. 24,000 already sold. Twenty-seventh edition of 5,000 copies Now Ready, enlarged, twenty new tanning secrets added (three cost $5 each). THE HUNTER'S GUIDE AND TRAPPER'S COMPANION tells how to hunt and trap all animals, from mink to bear, to make traps, boats, etc. How to tan and dress all hides, etc., etc., to color furs and skins. New secrets just added. The secret recipes in this book would cost $30 anywhere else. Tells how to hunt, fish, has hunting narratives, etc., etc. A New Book, well printed and bound, 64 pp. Price (not $1) but 25c.; six for $1; mailed free. Beware of "Recipes," "10-cent papers," and swindlers. Sold by all dealers. All wholesale news dealers sell it. Send for one. Worth $10 to any farmer, hunter, or boy. Only a "QUARTER." Address

HUNTER & CO., Publishers, Hinsdale, N.H.

COLLEGIATE & Commercial Inst.i.tute (Gen. Russell's School), New Haven, Conn. Winter term begins Jan.11

FOR SALE--A splendid set of Sub-marine Diving Apparatus, but little used, cheap. Address Box 1582, Norwich, Conn.

We rarely open a more readable magazine than "The Galaxy." There is not a dull page between its covers.--_N.Y. Times_.

Well sustains its reputation for vigorous and racy writing.--_N. Y.

Tribune_.

A model periodical; a credit to American periodical literature.--_Press, Philadelphia_.

THE GALAXY FOR 1870.

GREAT ATTRACTIONS.

ARTICLES SECURED FROM

CHARLES READE, MRS. EDWARDS, RICHARD GRANT WHITE, ANTHONY TROLLOPE, JUSTIN McCARTHY, PARK G.o.dWIN, DR. J. C. DALTON, DR. DRAPER.

AND ALL THE LEADING WRITERS OF THE DAY.

FIRST.

PUT YOURSELF IN HIS PLACE.--Charles Reade's Great Story will continue to delight the readers of the Galaxy the greater part of the year 1870.

Part First is is now ready in book form, and will be sent free with the Galaxy for 1870 on receipt of $4, the regular subscription price.

SECOND.

A NEW STORY BY MRS. EDWARDS, author of "Susan Fielding," "Steven Lawrence, Yeoman," etc. Mrs. Edwards is one of the very best female novelists now writing in the English language.

THIRD.

ANTHONY TROLLOPE will furnish a series of "Editors' Tales," in which he will work an entirely new vein.

FOURTH.