In these globes an endeavor has been made to combine a degree of accuracy such as is only possessed by the best modern maps, with the lowest price at which excellence can be attained. The terrestrial globe has been compiled from the most recent geographical surveys, with the aid of the accounts given by the best travellers. The astronomical information which has been supplied of late years upon the position and nomenclature of the fixed stars, has rendered a perfectly new celestial globe a most desirable acquisition to the student of astronomy. The labors of Piazzi, Bradley, Lacaille, Johnson, &c., in determining the places of the stars, and those of Baily in the correction of their nomenclature (in the new edition of the "British Catalogue"), have been carefully consulted in the celestial globe which is now advertised. The stars in the northern hemisphere are all which are given by Piazzi, with the addition of such of Bradley's (from the Tabulæ Regiomontana) as are not in Piazzi. The stars in the southern hemisphere comprise all those given by Lacaille and Johnson. SLATE GLOBES. Malby's 12-inch Slate Globe, $10 00-18-inch Slate Globe, $25 00. AMERICAN GLOBES. 3-inch Terrestrial Globe, $1-5-inch do., $1 50 9-inch Celes. and Terres. Globes (pair), $16 07 9-inch Terrestrial Globe, 8 00 10-inch 10 00 13-inch 13 00 16-inch 44 46 66 66 18 00 64 25.00 66 40 00 10-inch 13-inch Terrestrial Globes on neat mahogany bases, inclined axis, without horizon3-inch, 75 cts.; 5-inch, $1 25; 7-inch, $3 25. 13-inch Globes, with High Mahogany Stands and Compasses (the pair), 18-inch 18-inch $8.00 15 00 $40 00 $68 to $80 $100 00 Globes in neat Mahogany Cases, 1-inch, Terrestrial, 75c.; 1 inch, $1 00; 2-inch (the pair), $3 00. Mattison's Astronomical Maps, size 38 by 45 inches, on Cloth and Rollers, at $16 50 the set. Astronomical Diagrams for the Magic Lantern, of every variety and size. SET OF APPARATUS FOR MOTION, MECHANICS, AND MATHEMATICS. Price, $72 00. The Mechanical Powers, figures 6, 7, 8, 9, and 10, consisting of levers and puileys, arranged on a mahogany frame 24 inches long and 26 inches high, with four systems of pulleys attached. On each side of the frame, behind the pulleys, are graduated scales, with cords passing across the length of the frame and dividing the space into 24 equal parts, to show the number of inches, rise and fall, of the weights, and that it is inversely as the power gained. Brass levers on the top of the first, second and third orders; bent lever and pulley for passing over the cord; and on one end is fixed the wheel and axle with four different diameters. The ac companiments are, a large and well-made inclined plane, with graduated arch and carriage, wedge jointed in two parts, screw and lever, and screw as an inclined plane, and a set of 10 brass weights, from one-quarter of an ounce to eight ounces. Price $16 00. Also, Larger Sets, at $35 and $60. Atwood Machines, at $25, $40, $100 and $120. Whirling Tables and Apparatus, $30 and $75. SET OF APPARATUS FOR OPTICS. Price $163 00. A good Compound Microscope may be had for $3 50; larger, $5 50, $9 50, $10, and $20. Superior Magic Lanterns, $15; Sliders, 4 inches wide, on Astron omy, $20 the set; Natural History, $20; Botany, $20; Scripture History, $27 50: Humorous and Comic Sliders, $1 25 each. Also, Views and other subjects in great variety. A pair of Lanterns, with Dissolving Apparatus, $50. Astronomical Telescopes, with mahogany tube, on Stands, according to size, $30 to $48. Others of various kinds and styles, with brass tubes, varying from $25 to $400. The Eye Models in four parts. A Dissected Eye, four inches diameter, showing the cornea. iris, ciliary process, choroid tunic, crystalline lens, vitreous humor, retina, black pigment, optic nerve, &c., showing the eye in its socket with the muscles; the Bye with the rays of light passing from an object and forming the image on the retina; the object and image movable, showing the cause of long sight, short sight, and perfect sight. A 4-inch ball, with convex lens on one end, and a ground glass fixed to a sliding brass tube on the other end, and on which may be seen the inverted image, representing the eye as a camera obscura, and by the aid of the set of lenses, the use of spectacles to the eye explained. SET OF PNEUMATIC APPARATUS. (Price $42 00.) Consisting of a Double-barrel Air Pump, worked by racks and cog wheel, by double lever handles, mounted on a polished mahogany frame. Price $23. 2. Swelled Air-Pump Receiver, 3. Hand and Bladder Glass, 4. Pressure Glass, 5. Fountain in Vacuo, and Receiver, 4 00 10. Air Shower Experiment, 2 25 11. Magdeburg Hemispheres, 6. Bell With the above represented Air Pump, and ten different appendages, many interesting experiments may be performed, and all the most important principles connected therewith, illustrated in a satisfactory manner. All but the last two are drawn in the cut. On the left of the cut is represented a brass Condensing Pump, the barrel ten inches long, and one and a half diameter, and a strong glass Air Chamber, with cap, stop-cock, and pipes, attached; also, a Revolving Jet, Straight Jet and Rose Jet. The whole being a complete apparatus for the condensation of air and experiments therewith. The jets may be used by the passage of either air or water through them. Price $12. An apparatus with cylindrical copper air chamber, at the same price. Also, a Brass Tube for illustrating the principle of the Air Gun, price $1 50. The Air Pump Apparatus, or any portion of it, may be used with a Single Barrel Air Pump, at $7, $9, or $12, according to size, or with Pike's Improved Single Barrel Air Pump, price $20, being the largest, most powerful and durable pump made for the price. Also, Pike's elegant Lever Air Pumps, 4 feet high, price $63, or with gauge, $70. Larger Double-barrel and Lever Air Pumps, and more extended apparatus constantly on hand. SET OF APPARATUS FOR HYDROSTATICS. Price $45. SET OF ELECTRICAL APPARATUS. Price $31 50. Consisting of a well-made, 7-inch Cylinder Electrical Machine, with mahogany frame, neat, turned pillars, Insulated Prime Conductor, Brass Ball and Wire, Pair of Chains, and Box of Amalgam. Price $14 00. 4. Quadrant Electrometer, 1 25 5. Image Plates and Pith Images, 1 25 11. Electrical Chase-Four Revolving 2.50 6. Chime of three Bells, 2 00 12. Insulating Stool, 3 00 7. Revolving Flyer, 8. Luminons Spiral Tube, 0 50 13. Electrical Swan, 0 25 The above described Set is one much approved, and is warranted superior to any other sets that have yet been before the public, for its price; and the working of the machines is unsurpassed, if equalled, by any of their size. Any portion, or all of this Electrical Apparatus, may be used with a 4-inch cylinder machine, costing but $8, or 5-inch, $10; 6-inch, $12; 8-inch, $16; 9-inch, $18; 10-inch, $20. A 16-inch Plate Electrical Machine, handsomely finished, the Prime Conductor and Rubber Conductor of brass, supported on stout, swelled glass pillars, having brass sockets and mahogany frame, and mounted on four turned feet. Price $25 00, or, with the Apparatus, $42 00. A 20-inch plate Electrical Machine, mounted as the preceding one, but much larger in all its parts, $38, or with above apparatus, $55. Larger Machines and more extended Apparatus, in great variety of form and price. Grove's Battery, 12 series of Zinc and Platina in Glass Cups, arranged in a neat Black Walnut Case. with Cover, with a set of Conducting Wires, tipped with fine copper, steel and iron wire, watch-spring, &c., which burn with bright and varied colors, brilliant scintillations, &c.; a pair of Carbon Points, for producing the Galvanic Light, and a Glass Globe, with wires tipped with platina, for collecting the gases in the decomposition of water. Price of the Battery, according to size, $15, $18, and $20. SET OF APPARATUS FOR CHEMISTRY. Price $47 00. A great variety of other Chemical Apparatus on hand. A Compound Blow Pipe and Pneumatic Cistern Combined, $8 50; larger, $12. Hydrogen Generator, $4. Gas Bags to hold three or four gallons, with Stop-cock, $3 25; larger size, $7 to $10. Sheet Iron Furnaces, $8. Davy's Safety Lamp, in Brass, $3. Apparatus for Specific Heat, $4; for Unequal Expansion of Fluids, $4; for Ball and Ring Experiment, $2 25; for Condensation by Mixture, $1 25. Marcet's Steam Boiler, with Barometer and Thermometer, $15. Copper Still, Worm and Tub, $6 to $8. Ure's Eudiometer, $2 50, if graduated, $4; Flask Holder, $1 50; Wolf's Apparatus, 4 bottles and tubes, arranged in a tray, $6 to $7 50; Glass Alembics, $1 to $2. Twelve 6-inch Test-Tubes, in mahogany polished frame, $1 50. Marsh's Arsenic Apparatus, $2 50. Bulb Tubes, 37c.; two Bulb Tubes, 50c. Drying Tubes, 37 to 75c. Chemical Materials on hand and furnished to order at regular orices. |