ADVERTISEMENTS.

_Advertisements will be admitted on this page at the rate of $1.00

per line for each insertion. Engravings may head advertisements at the

same rate per line, by measurement, as the letter-press._

* * * * *

_AN IMPORTANT FACT._

MARVIN & CO.'S

SPHERICAL SAFES

HAVE NEVER BEEN ROBBED.

Hundreds are in use by Banks, Bankers, and Merchants.

{265 Broadway, New York.

{721 Chestnut st., Philadelphia.

Warehouses, {108 Bank st., Cleveland.

{ 93 Main st., Buffalo.

* * * * *

L: L: SMITH & CO.,

NICKEL PLATERS,

6 HOWARD ST., NEW YORK,

Between Elm and Centre.

* * * * *

_SAVE YOUR FUEL._

[Illustration]

THE ORIGINAL L. B. TUPPER'S

FURNACE GRATE BAR.

Guaranteed to make from 5 to 10 lbs. more steam, with less fuel, than

any other bar. Adapted to all kinds of fuel; no alteration of furnace

required. Received Silver Medal at Cincinnati Industrial Exposition,

1870; Silver Medal at Worcester Co. Mechanics' Association, 1866;

Medal and Diploma at American Institute Fair, 1870; Honorable Mention

at Paris Exposition. Send for descriptive pamphlet. Now in use in

10,000 places.

Scientific American, Volume XXIV., No. 12, March 18, 1871 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 169 / 194 题