The director, Schmalfuss, encouraged him in his mathematical studies by lending him books (among them Leonhard Euler's works and Adrien Marie Legendre's Theory of Numbers), which Riemann read, mastered and returned within a few days.

Competent judges have compared him to Leonhard Euler for his range, analytical power and introduction of new and fertile theories.

Walter (1827), but was immediately superseded by the translation of the second edition by Julius Hare and Connop Thirwall, completed by William Smith and Leonhard Schmitz (last edition, 1847-1851).

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The complete analytical treatment was first given by Leonhard Euler.

The earliest known descriptions of the foxglove are those given by Leonhard Fuchs and Tragus about the middle of the 16th century, but its virtues were doubtless known to herbalists at a much remoter period.

See Rudio, Leonhard Euler (Basel, 1884); M.

See Leonhard Balm, Geschichte des Temeser Banats (2 vols.,Leipzig, 1861); Johann Heinrich Schwicker, Geschichte des Temeser Banats (Pest, 1872).

He was tragically drowned while bathing in the Neva in July 1789, a few months after his marriage with a daughter of Albert Euler, son of Leonhard Euler.

The German botanist, Leonhard Rauwolf (d.

These equations were found by d'Alembert from two principles - that a rectangular canal, taken in a mass of fluid in equilibrium, is itself in equilibrium, and that a portion of the fluid, in passing from one place to another, preserves the same volume when the fluid is incompressible, or dilates itself according to a given law when the fluid is elastic. His ingenious method, published in 1752, in his Essai sur la resistance des fluides, was brought to perfection in his Opuscules mathematiques, and was adopted by Leonhard Euler.