Immanuel Kant, [Footnote: By the paternal side, the family of Kant was of Scotch derivation; and hence it is that the name was written by Kant the father--_Cant_, that being a Scotch name, and still to be found in Scotland. But Immanuel, though he always cherished his Scotch descent, substituted a _K_ for a _C_, in order to adapt it better to the analogies of the German language.] the second of six children, was born at Königsberg, in Prussia, a city at that time containing about fifty thousand inhabitants, on the 22d of April, 1724. His parents were people of humble rank, and not rich even for their own station, but able (with some assistance from a near relative, and a trifle in addition from a gentleman, who esteemed them for their piety and domestic virtues,) to give their son Immanuel a liberal education. He was sent when a child to a charity school; and, in the year 1732, removed to the Royal (or Frederician) Academy. Here he studied the Greek and Latin classics, and formed an intimacy with one of his schoolfellows, David Ruhnken, (afterwards so well known to scholars under his Latin name of Ruhn-kenius,) which lasted until the death of the latter. In 1737, Kant lost his mother, a woman of excellent character, and of accomplishments and knowledge beyond her rank, who contributed to the future eminence of her illustrious son by the direction which she gave to his youthful thoughts, and by the elevated morals to which she trained him. Kant never spoke of her to the end of his life without the utmost tenderness, and acknowledgment of his great obligations to her maternal care. In 1740, at Michælmas, he entered the University of Königsberg. In 1746, when about twenty-two years old, he printed his first work, upon a question partly mathematical and partly philosophic, viz., the valuation of living forces. The question had been first moved by Leibnitz, in opposition to the Cartesians, and was here finally settled, after having occupied most of the great mathematicians of Europe for more than half a century. It was dedicated to the King of Prussia, but never reached him--having, in fact, never been published. [Footnote: To this circumstance we must attribute its being so little known amongst the philosophers and mathematicians of foreign countries, and also the fact that D'Alembert, whose philosophy was miserably below his mathematics, many years afterwards still continued to represent the dispute as a verbal one.] From this time until 1770, he supported himself as a private tutor in different families, or by giving private lectures in Königsberg, especially to military men on the art of fortification. In 1770, he was appointed to the Chair of Mathematics, which he exchanged soon after for that of Logic and Metaphysics. On this occasion, he delivered an inaugural disputation--[_De Mundi Sensibilis atque Intelligibilis Forma et Principiis_]--which is remarkable for containing the first germs of the Transcendental Philosophy.