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The format is approximately 5.75 inches by 9 inches. [6], 121, [1] pages. Formulae. Illustrations. Front hinge weak and has been repaired. Index. Ex-library with the usual library markings. Cover is soiled, stained and corners bumped and worn through with other wear. Sir Alfred George Greenhill FRS FRAeS (29 November 1847 in London 10 February 1927 in London), was a British mathematician. George Greenhill was educated at Christ's Hospital School and from there he went to St. John's College, Cambridge in 1866. In 1876, Greenhill was appointed professor of mathematics at the Royal Military Academy (RMA) at Woolwich, London, UK. He held this chair until his retirement in 1908, when he was knighted. His 1892 textbook on applications of elliptic functions is of acknowledged excellence. He was one of the world's leading experts on applications of elliptic integrals in electromagnetic theory. He was a Plenary Speaker of the ICM in 1904 at Heidelberg (where he also gave a section talk) and an Invited Speaker of the ICM in 1908 at Rome, in 1920 at Strasbourg, and in 1924 at Toronto. Mechanical flight is the use of a machine to fly. These machines include aircraft such as airplanes, gliders, helicopters, autogyros, airships, balloons, ornithopters as well as spacecraft. Gliders are capable of unpowered flight. Another form of mechanical flight is para-sailing, where a parachute-like object is pulled by a boat. In an airplane, lift is created by the wings; the shape of the wings of the airplane are designed specially for the type of flight desired. There are different types of wings: tempered, semi-tempered, sweptback, rectangular and elliptical. An aircraft wing is sometimes called an airfoil, which is a device that creates lift when air flows across it. The lectures were delivered in the Imperial College of Science and Technology in March 1910 and 1911, under the title The Dynamics of Mechanical Flight, and they are given here in the form in which they were delivered. The subject was then beginning to take hold of the public imagination, consequent on Bleriot's feat of crossing the Channel on July 25, 1909, and the great strides made in the interval since in Mechanical Flight. The possibility of Human Flight has been an obsession of the imagination of Man from the earliest times recorded. From a contemporary review: Up to the present time the study of problems relating to aeroplanes and airships has conspicuously failed to attract the attention of our leading mathematicians and mathematical physicists. This is the more surprising in view of the important part that has been played in the past, and is still being played, by methods of mathematical analysis in systematizing and elucidating our knowledge of electric phenomena. A book by so trustworthy a mathematician as Sir G. Greenhill should prove of great value in clearing up the misunderstandings which have so frequently arisen as to the meaning and use (or misuse) of formulae in connection with aeronautics.
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