8
£ j. ( 1 .
Wind Mills on a new and superior construction.3 3 0
Copper Bottle, Beam, and Stand.2 15 0
Bell Experiment , .from 10s. to 1 1 0
Exhausting and Condensing Syringes.. . .070
Ditto, in one Instrument.0 10 0
Pocket Condensers for Instantaneous Light.0 3 0
Sliding Wire, and Collar.0 )2 6
Ditto ditto Thornthwaite’s Improved, with ball and socket joint . 0 17 6Model of Diving Bell . ....150
GALVANISM, OR VOLTAIC ELECTRICITY.
Cruikshank’s Batteries, in Mahogany Troughs . . • from \l. Is. Od. to 5 5
Grove’s Platinum Batteries, excited with dilute muriatic acid in connection
with the zinc, and strong nitric acid in connection with the platinum, from 1 15Smee’s Batteries, in round earthenware pots, so constructed that the zincs canbe readily replaced by means of a binding screw, without the trouble ofsoldering or bending: —
Pints. . . 0 10
Quarts ............. 0 12
4-Quart.15
G-Pint ditto, in mahogany tray, so constructed that they maybe arrangedfor quantity or intensity, with flexible conducting wires . . .33
G-Quart ditto, ditto ..3 17
Ditto ditto, in Wollaston’s troughs of 12 cells, with double zincs, and the silver
plates, presenting a surface of 252 square inches.5 5
Ditto ditto, of 432 inches.G G
Cast-Iron , or Maynooth Batteries, per cell.0 7
Every description of Apparatus connected with Magnetism and Electro-magnetism, for winch see General Catalogue.
ELECTRO-METALLURGY.
ELECTROTYPE APPARATUS for procuring, by galvanic action, perfect fac-similiesof engraved copper-plates, however elaborate; also, correct copies of medals, seals,plaster casts, and all kinds of metallic ornaments, from 10s. Gd. to 3/. 3s. Od. andupwards,
OPTICAL APPARATUS,
The Patent Pantoscopic Spectacles, the most recent and scientific invention for the im-provement of sight, from 7s. Gd. to 25s.; if gold mounted, to £3 3s. See “ Smee onVision in Health and Disease, and the Value of Glasses for its Restoration,” p. G4.Price Is.
MICROSCOPES.
Single Microscopes for Botanical and other purposes • • from 5s, to 1 10 0
ACHROMATIC MICROSCOPES.
Horne and Co/s improved Medical Compound Achromatic Microscope, withachromatic object-glass, box, brass forceps, &c. &c., magnifying power,from 1000 to 8000, packed in mahogany case or cabinet . . . .550
Ditto, with jointed pillar and fine adjustment, test objects, &c., magnifying
power varying from 1000 to 12,000 . 7 10 0
Ditto, ditto, magnifying power from 1000 to 25,000 . 10 10 0
Ditto, ditto, ditto 1000 to 50,000, with extra eye piece, &c.. 15 15 0
Very superior Compound Achromatic Microscope, with moveable and safetystage, fine adjustment, two eye-pieces, and two sets of achromatic object-glasses, capable of magnifying from 1500 to 100,000 time9, plane and con-cave mirrors, detached condensing lens, aquatic box, bras3 forceps, &c.,and six objects mounted in balsam, the whole packed in neat mahogany
cabinet. • . ... . . . 21 0 0
Ditto, ditto, of higher magnifying power, and fitted with achromatic condenser,
silver specula, polarizing apparatus, &c.from £35 to 80 0 0