Brass Galvanometer with Glass Dome and Wooden Base

Moving coil brass galvanometer with three-screw base, instrument signed Philip Harris Ltd Birmingham England n. 19402, made in the early 1900, a tool used as a detector of direct cur...

Vertical mirror galvanometer made in 1850 circa, oak and glass, three adjustable screws at the base. Tool constituted by a magnet bar movable inside a coil and connected to a needle. In the absence of current the needle is positioned vertically while when the coil is crossed by the current it creates a magnetic field that moves the needle. This type of galvanometer was used for measurement of insulation of telegraph cables...

Botanical model made of painted plaster and mounted on black painted wooden boards of an orthotropic ovule made by prof. T. Ferraris for Vallardi publisher Milan Scientific material, complete with plate with the legend of the names of the various parts of the mushroom, early 1900s. Good condition. Measures: 20.5 x 15.7 cm, height 25.5 cm. The origins of the publisher Vallardi date back to 1750 when founder Francesco Cesare (1736-1799) acquired a small craft in the heart of old Milan. In the early nineteenth century, the publishing house was noted for the production of works of art, geography and science, including a "Tour of Italy" which took twenty-two printings between 1819 and 1835. The complete works of various maps and directions for travel, including timetables and fares for transportation of the time, can be considered the first modern tourist guide. The firm "Vallardi" was born in 1843 and the company became industrial, with the opening of branches on national scale...

Wooden and brass polarimeter with cast iron tripod base from the late 1800s. It is an instrument used to determine the concentration of sucrose and glucose in raw materials and sugar...

Large brass and glass nautical magnetic compass from the early 1900s, mounted on custom-made oak and brass board. Compass diameter cm 24.5 - inch 9.4, height with base cm 21 - inch 8...

Sand hourglass, brass container with circular base and tapered columns in the center and blown glass cruet. Duration 45 minutes. English manufacture of the early 1900s. Measures height 20 cm, diameter 11.5 cm – 7.9x4.5 inches. Shipping is insured by Lloyd's London; our gift box is free (look at the last picture). In Greece, the use of hourglasses was introduced in 325 BC, in the form of stone containers with a truncated cone shape that let water flow out of a hole in the bottom at a constant rate. Other hourglasses were cylindrical or cup-shaped and were slowly filled by a constant flow of water. Some signs on the inner surface of the container indicated the passage of hours as the liquid level rose. Another version consisted of a metal container with a hole in the bottom which, placed to float in a larger container, sank in a given time. This system remained in use until the 20th century in North Africa. These clocks were typically used at night, but not during the day, when the more accurate sundials were available. In the first half of the III century BC. Ctesibius transformed the hourglass into the more complex water clock. Various mechanisms were introduced by him and others to increase the precision of the watch by regulating the pressure and keeping the flow of water constant, but also to offer a better display of the time. The most advanced specimens could ring bells or gongs, open windows to display images, or had movable indicators, dials or representations of celestial bodies. Among the designers of watches...

A unique Hand crafted magnifying glass from the 20th Century. The viewing glass is square with a brass frame and brass nautical symbol inlayed at the handle which also displays a br...

A 1950s Spanish Mid-Century Modern educational D'Arsonval galvanometer manufactured by the Leonardo Torres Quevedo Institute in Madrid. Model MA 54-04. The wood and glass structure s...

Large oval based glass dome/shade with 26 exotic, colourful birds in naturalistic setting comprising Hummingbirds with open wings and on their nests. This Victorian arrangement is in...

Telescopes are a terrific decorative addition to any den, library or study. A compliment to any Ralph Lauren, rustic or studious environment, ours has all wooden adjustable legs with...

Bronze Base with Turned Wooden Central Part for Smoking.

Possibly Rawhide as the Stretched Fabric on Top of Drum. Five Direction Handles. Intricate Knotting at the Bottom to Secure the Top Fabric.Possibly Native American Origin. Vintage Co...