Thatcher's Calculating Instrument, by Keuffel & Esser Co., New York, No. 4012 / 4142, patd. by Edwin...
Richter Mathematical Blocks, red, stone, and blue shapes in two trays, in maker's box with...
Model 5 National Cash Register, by National, Dayton, Ohio, No. 168386, patd. dates to June 13. 1894...
Model 6 National Cash Register, No. S38760, with two rows of keys, marquee, and brass foliate-cast...
Hammond Model I Typewriter, with curved two-row keyboard of ebony "piano" keys, enclosed mechanism...
World Type Writer by the Typewriter Improvement Co., Boston, No. 13450, patd. October 12 1886, with...
Two Boxwood Rules, one by Merrifield & Co., New York, with navigational tables; the other a slide...
Fifteen Slide Rules, including Eugene Dietzgen Co. Maniphase rule in box; Keuffel & Esser Co...
Gurley Dry Capacity Measures, three nickel-plated measures and a nested set of four tubular...
Sike's Hydrometer, No. 6674, with bone thermometer, brass bulb, eight brass weights on bone pegs...
Zeiss Dipping Refractometer, Carl Zeiss, Jena, No. 8835, with vulcanite-covered tube, black enamel...
Pocket Coin Balance by Holt, with turned steel beam, pointer with finial at the tip, and two brass...
Weights and Measures, a cased pocket coin balance with weights; a set of American brass nesting...
Two Balances and Weights, a brass beam balance on mahogany base; a cast-iron counter scale; a set of...
Three Balances, a brass postage scale; a counter postage scale; a beam balance on oak base, ht. 12...
Fairbanks Cast-Iron Counter Scale, with transfer-decorated china tray depicting blind Justice, later...
Springless Auto-Scale, by Automatic Scale Co. Ltd., Manchester & London, No. 752461, with original...
Analytical Chain Balance by Griffin & George Ltd., London, with micrometer wheel, plummet, brass...
Early Cased Beam Balance by J.M. Evans, Essex, Connecticut, with brass pillar, finial, beam and...
Analytical Beam Balance by Seederer-Kohlbusch, New Jersey, with lacquered brass pillar, divided beam...
Apothecary Balance, with twin nickel-plated pans, marble platform, and polished cherry case with...
Victorian Brass Beam Balance, pat. 29876, with faceted vase-shaped pillar, scrolling bracket with...
Brass Beam Balance by Day & Millward, with steel beam on counterpoised bracket with screw-thread...
Grover & Baker Sewing Machine, No. 10574, with flywheel-operated mechanism, hinged bedplate with...
Salesman's Sample Model of a Farm Plow, lg. 11 in., with stand...
Patent Model of a Machine for Dressing Wood and Stone, No. 238290, granted March 1. 1881 to Nicholas...
Patent Model of an Apparatus for Carburetting Gases, with patent tag to S.T. Mc.Dougall, Jan 3 1865...
Two Miniature Brass and Steel Steam Engine Models, a single-cylinder horizontal engine with double...
Crosby Steam Gauge for A. H. Moulton, No. 542407, with 9 1/2-inch dia. silvered dial engraved in...
Rutland Railroad Steam Locomotive Bell and Number Plate, Vermont, a 14-inch dia. brass bell on...
Sorensen Tankless Air Compressor, Model 220, No. 5329, by C.N. Sorensen Co. Inc., Long Island City...
Jones Live-Map Meter, by Jones Live-Map Meter Co., Broadway & 76 St., New York, No. 215, brass dial...
Wet Cell and Electro-Magnetic Coil...
Three Early Electrical Items, including a 4-inch coil, and a compass with two brass terminals and 4...
Edison Home Kinetoscope Transformer, by Thomas A. Edison Inc., Orange, N.J., Underwriters' Model No...
Diehl Alternating Current Electric Motor, by Diehl Manufacturing Co., Elizabethtown, N.J., No...
Early Edison-Type Generator, with 9-inch vertical field poles, shaft with copper contacts supported...
Five Figural-Filament Light Bulbs, depicting birds and flowers; and a brass lamp...
Electric Steamer Model, Challenger, dated 1934, with carved wood hull containing the motor, single...
Two Sextants, a lattice-pattern brass sextant by Brandis & Sons Inc., Brooklyn, N.Y., No. 6000-5...
9-inch Radius Brass Lattice-Pattern Sextant, with silvered vernier scale divided 0-150°...
10-inch Radius Ebony Octant, with bone scale divided 0-100°, brass index arm with tangent screw...
Two Compasses, a gimbaled compass by Hildebrand, Freiberg, No. 2065, with silvered 3-inch dial, East...
Two Marine Navigation Instruments, a U.S. Navy Azimuth Circle, Mark III, Mod. 2, No. 1345 - 1941, in...
Gyro-Compass Repeater Ship's Compass, by Sperry Gyroscope Company, Inc. New York, No. 7382, Mark XV...
Deep Sea Diving Helmet, by A.J. Morse, Boston, Model 512, four-light helmet with tinned surface, the...
English Pocket Compass and Sundial, probably 18th century, with 2-inch dia. paper card, 16-point...
Pocket Compass, 18th century, with 2 1/2-inch engraved paper dial, 32-point compass rose...
Box Sextant by Troughton & Simms Ltd., London, No. 7315, with original bronzed finish, silvered arc...
Augsburg-Pattern Equinoctial Dial by Andreas Vogler, signed on the underside And. Vogler, of...
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