19th Century Scientific Instruments

Numbered No 25 and signed by J Duboscq a Paris. Louis Jules Duboscq was a French instrument maker, inventor and pioneering photographer. He was known in his time and is remembered t...

Each in the form of a ship's wheel with 2.5 inch silvered dial, contained in cases, one with seven turned banded agate handles, the other with eight banded agate handles, each on ova...

Manufactured in the Louis XVI style, both clock and barometer are encased within an ormolu case and flanked on either side by trumpet wielding cherubs, each surmounted with a patinated bronze sphere that is topped with a crown, the bases terminating in a pine cone finial. The barometer face signed 'E. Mottheau Paris', the clock movement signed 'LEMERLE CHARPENTIER' and 'LESIEUR'. This beautiful antique French clock and barometer...

Gilt-bronze and Tortoiseshell Clock and Barometer set by Gleizes French, 19th Century Height 115cm, width 30cm, depth 7cm In the Louis XV style, t...

A wonderful Victorian brass map or charge magnifying glass complete with it's original brass case. The lid of the case is signed by the maker using the anchor trademark together wit...

An unusual late nineteenth century Coddington magnifying glass made from English brass having been professionally polished. Excellent condition measuring 3" x 1" x 1". Item ID: 443...

Brass log in the shape of a harpoon, signed T. Walker’s Patent Harpoon Ship Log A 1 London, from the second half of the 19th century. It is an ancient nautical instrument, very rare and with a characteristic shape, which measured the distance and speed of a ship. He was thrown overboard and dragged behind the ship itself; rotating thanks to its propeller, it transmitted the number of revolutions made on itself to the three dials made on an enameled metal plate placed in the center of the log; the quadrants reported measurements in miles from 0 to 100 in tens, from 0 to 10 in units, from 0 to 1 in quarters. The data was then read every hour to also derive the speed. In good condition, fully functional and mounted on a custom-made brass wooden base. Length 50 cm – 19.7 inches, propeller width 14 cm - 5.5 inches, log body diameter 4,5 cm - 1.7 inches. Shipping is insured by Lloyd's London; our gift box is free. In the past centuries the attempt to measure the speed of the ships was especially hindered by the lack of tools for the measurement of time of sufficient precision: throwing a piece of wood into the sea from the bow of a ship and measuring the time it took to get at the stern, it was possible to obtain some information on the speed of the ship, but with many errors and inaccuracies. The principle of mechanical patent log was shown to the Royal Society in 1699 by Robert Hooke, but the first model produced for commercial use was patented just in 1802 by Edward Massey, uncle of Thomas Walker, that succeeded him in business. Thomas Walker patented his first Walker log...

Brass telescope with leather handle, made at the end of the nineteenth century, focusing with three extensions. English manufacture of the second half of the 1800s. Maximum length 99...

Quality Black Forest carved walnut barometer having a quality carved walnut shaped case with a carved stag's head to the top, carved leaves and foliag...

A very rare and compete collection of ten labeled wax models of the human heart, showing the fetal development form early in the fourth week, to complete fetal growth. The hand colo...

Charming 19th century folk art boat-shaped mortar or grinder, perfect for the coffee today ;) ca 1830 Sweden.

A late 19th early 20th century medical model on a wooden stand with removable plaster organs, by Marcus Sommer of Sonnerberg, Germany. With original label.