Istruzioni sull'uso del ponte di Wheatstone per F. Salvatori (ispettore generale linee telegrafiche), Tipografia Bencini, 1881, Softcover, 21 x 16 cm. First Italian translation of Wheatstone bridge. A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider). The Wheatstone bridge was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. Good condition.