LEOPOLDO NOBILI (1784-1835), Italian physicist, born at Reggio nell' Emilia in 1784, was in youth an officer of artillery, but afterwards became professor of physics in the archducal museum at Florence, the old habitat of the Accademia del Cimento.
Weak health, consequent on over-study, prevented him from obtaining the highest academical honours, but he graduated as doctor in theology at the age of twenty-two, and then entered the Accademia dei Nobili ecclesiastici, a college in which clergy of aristocratic birth are trained for the diplomatic service of the Roman Church.
Educated at the Accademia dei Nobili ecclesiastici at Rome, he was ordained priest in 1783, and in 1790 attracted favourable attention by a tactful sermon commemorative of the emperor Joseph II.
With Brahminism in India followed by Robert de' Nobili was fatal to the vitality of his own and other missions.
After two years of study at the Accademia dei nobili ecclesiastici, where he became a friend and disciple.
Nobili (1784-1835) in 1825 conceived the ingenious idea of neutralizing the directive effect of the earth's magnetism by employing a pair of magnetized steel needles fixed to one axis, but with their magnetic poles pointing in opposite directions.
It has been already mentioned that Schweigger invented in 1820 the " multiplier," and Nobili in 1825 the astatic galvanometer.
As, however, their vehicle was Latin, a mere mention must suffice, and for the same reason only the title of a notable book by Francisco Sanches can be given, the De nobili et prima universali scientia quod nihil scitur.
Afterwards he went to Rome and studied for the priesthood in the Collegio Capranica from which he passed to the Accademia dei nobili Ecclesiastici, the usual training school for those who devote themselves to the " carriera " or diplomatic service of the Vatican.
Nobili in 1831.