Leonhard Euler, 18th century Swiss mathematician and physicist mb-artistname Jan Balet French President Raymond Poincare and

French President Raymond Poincare and King George V

with a group of figures

Ornithological study of a female Crimson Rosella (Platycercus elegans) native to Australia

Inscribed verso [by William Fletcher Barrett]: 'Faraday

Leonhard Euler, 18th century Swiss mathematician and physicist mb-artistname Jan Balet French President Raymond Poincare andLeonhard Euler, 18th century Swiss mathematician and physicist, (1804). Euler (1707 1783) was one of the founders of pure mathematics. He made many decisive and formative contributions to every aspect of pure and applied mathematics, physics and astronomy and he introduced many new functions including the gamma function and elliptic integrals. He developed the theory of trigonometric and logarithmic functions, reduced analytical operations to more