1860s Scientific Instruments

19th Century Human Medical Natural History Skull Example A heavily patinated example of a mid-19th century human medical natural history skull example. This not articulated and come...

19th century Robert Merrill compass with brass bowl and varnished wood box. Sliding lid. Brass bowl has original lacquer. Great old mariners’ compass. Weight: 3 lbs Overall Dimensio...

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...

19th century Robert Merrill compass with brass bowl and varnished wood box. Sliding lid. Brass bowl has original lacquer. Great old mariners’ compass. Weight: 3 lbs Overall Dimen...

Set of nine medium-sized wooden pharmacy-herbal jars (Pine, Mint, Viola, Hops, Verbena, Ginger, Anise, Garlic, Melissa, Dill, Sage, Thyme) in the purest neoclassical style. The surfa...

Antique Victorian quality carved burr walnut banjo barometer signed W Johnson having a quality burr walnut shaped banjo barometer with attractive carved walnut scroll decoration, c...

Extremely rare physical and political Terrestrial globe according to the most recent discoveries published by G.B. Paravia and Comp. Rome - Turin - Milan - Florence in 1864. This glo...

Brass log in the shape of a harpoon, signed Walker’s A2 Harpoon Ship Log Patented 18th Sept. 1866. 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 very good condition, fully functional and mounted on a custom-made brass wooden base. Length 54 cm - 20 inches, propeller width 16 cm - 5.9 inches, log body diameter 5 cm - 2 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...

Rare marine compass with original makers label from D. Riggs & Co. Nautical Store, Philadelphia. Spun copper bowl, strap gimbal fitted to a dovetailed w...

Antique theodolite of burnished brass signed Pietro Sbisà OMS Florence made in the second half of the 19th century. This instrument was used in terr...

La Filotecnica Ing A. Salmoiraghi Milan Centesimal tacheometer 133 b normal N. 55858 Catasto Italiano model of the second half of the 19th century, of burnished brass, complete with ...

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 ...