8

A. B. DAVIDSON. B. G. HARRIS.

A. B. DAVIDSON & HARRIS,

IMPORTERS AND DEALERS IN

AND TAILORS' TRIMMINGS,
249 MARKET STREET, BALTIMORE.

F. W. & R. KING,

(SUCCESSOES TO JAS. GREEN,)

No. 33 SOUTH STEEET,

Manufacture and keep constantly on hand a general
assortment of

MATHEMATICAL PHILOSOPHICAL

AND DAGUERREOTYPE APPARATUS,

Surveying Instruments, Drawing do., Tele-
scopes, Pocket Compasses, Sun Dials, Baro-
meters, Thermometers, Hydrometers, Out
Sticks, Lumber Sticks, &c. Also, DAGUER

REOTYPE PLATES, Cameras, Chemicals, Cases, Frames, &c., of the best manufac-
ture. From our long acquaintance with the trade in New York, we are enabled
to furnish all articles in our line of business at the lowest New York prices.

RICHARD PATTEN & SON,

MANUFACTURERS OF

MATHEMATICAL INSTRUMENTS

TO THE UNITED STATE STATES GOVERNMENT
No. 25 SOUTH STREET.

For sale, an assortment of superior LEVELS and TRANSIT INSTRUMENTS,

for Engineers, Surveyors, &c.
Instruments made to order as they should be, and warranted.

JOHN JONES,

MATHEMATICAL, OPTICAL & PHILOSOPHICAL

INSTRUMENT MAKER,

No. 18 SOUTH STREET, BALTIMORE,

Keeps constantly on hand a large assortment of School and Chemical Apparatus,
Drawing and Surveying Instruments, Hydrometers, Thermometers, Barometers,
&c. Microscopes, Telescopes, Linen Provers, Magnifiers, and a variety of arti-
cles useful for scientific research and manufacturing purposes.

THOMAS P. LAMB,

WIRE AND SIEVE MANUFACTORY

No. 25 SOUTH CALVERT STREET, BALTIMORE.

T. P. L. manufactures and sells the following articles, viz : Wire for Roll-
ing and Standing Screens, Merchants' Mills, &c., Riddles for Brass and Iron
Foundries ; Fancy Wire Work of every description for Libraries, Cellar Win-
dows, Warehouses, Sky-Lights, &c.; Rat and Mouse Traps, Oyster Broilers, &c.
Also, Bird Cages of all kinds, all of which are made of the best materials, and
will be sold at low prices.