1918s Small Brass Magnetic Pocket Compass Signed Negretti & Zambra Antique Tool

Torricellian barometer of oak wood, signed Negretti & Zambra London from the second half of the 19th century, complete with reading vernier for checking the pressure variation and thermometer. Height 98 cm - 10.6 inches, width 27 cm - 38.5 inches, depth/thickness 5 cm - 1.96 inches. Very good condition, fully functional. For safety during transport the barometer will be shipped emptied of mercury. The mercury will be placed in a sealed container in the package together with the barometer. When it was discovered, that changes of atmospheric pressure are connected to changes of weather, barometers became very popular. Evangelista Torricelli...

Magnetic topographer compass from the early 1900s, brass and bakelite base; instrument consisting of a magnetized needle free to rotate on a horizontal plane, marking with its tip th...

Rare magnetic nautical surveying compass, brass, late 19th century signed Elliott Bros London complete with leather case. This is a small compass, 7 cm diameter, typically used in re...

Magnetic topographic compass, of oak and brass; instrument consisting of a magnetized needle free to rotate on a horizontal plane, marking with the tip of the needle the direction of magnetic north, compass card with eight winds complete with goniometric circle divided into 360 °, complete with the compass needle lock. Italian manufacture of the late 19th century. Very good condition. Measure 3.1x3.1 height 1. Shipping is insured by Lloyd's London; our gift box is free (look at the last picture). The invention of the compass is mysterious but it is well known that magnetite was discovered in Magnesia, a city of Asia Minor. We can find the first indications about the use in Europe of the magnetic force for orientation at the end of the XII century...

Negretti & Zambra Fine Edwardian oak cased barograph with bevelled glass panels and central chart drawer. Ten vacuum chambers linking ...

Negretti & Zambra Fine Edwardian oak cased barograph with hinged lid, bevelled glass panels and central chart drawer. Seven vacuum ...

Negretti & Zambra Fine Edwardian mahogany cased barograph with beveled glass panels and central chart drawer. Seven vacuum chambe...

Unusual mahogany-cased barograph and barometer by Negretti & Zambra, having five glazed removable lid. The mechanical eight-day movement is housed in the drum, fitted with a seven-da...