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The notebooks of Leonardo da Vinci

This compilation represents the surviving written and drawn works of Italy's Leonardo da Vinci (1452-1519), the celebrated Renaissance polymath known for his contributions to art, science, and engineering. The notebooks, written predominantly in his distinctive mirror script, span thousands of pages and cover an extraordinary breadth of subjects, including human anatomy, botany, zoology, geography, astronomy, mathematics, and mechanical inventions. The documents reveal his systematic approach to observation, his detailed anatomical studies based on dissection, his plans for flying machines, and his ideas about water flow and canal systems. These manuscripts constitute one of the most important primary sources for understanding the intellectual history of the Renaissance period and demonstrate the mind of an artist who viewed science and art as interconnected pursuits. more

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Leonardo da Vinci
Leonardo da Vinci

Leonardo da Vinci was an Italian Renaissance polymath whose works and ideas had a profound influence on the world. He was a renowned painter, sculptor, inventor, scientist, musician, and engineer. more

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“The body of the Earth, large, sluggish and inapt for motion, is not to be disturbed by movement (especially three movements), any more than the Aetherial Lights [stars] are to be shifted, so that such ideas are opposed both to physical principles and to the authority of the Holy Writ which many time: confirms the stability of the Earth (as we shall discuss more fully elsewhere).”

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Author:Tycho Brahe
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“The earth in its rapid motion round the sun possesses a degree of living force so vast that, if turned into the equivalent of heat, its temperature would be rendered at least one thousand times greater than that of red-hot iron, and the globe on which we tread would in all probability be rendered equal in brightness to the sun itself.”

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“The observations, so numerous and so important, of the pendulum as object are especially relevant to the length of its oscillations. Those that I propose to make known to the [Paris] Academy [of Sciences] are principally addressed to the direction of the plane of its oscillation, which, moving gradually from east to west, provides evidence to the senses of the diurnal movement of the terrestrial globe.”

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“The two revolutions, I mean the annual revolutions of the declination and of the centre of the Earth, are not completely equal; that is the return of the declination to its original value is slightly ahead of the period of the centre. Hence it necessarily follows that the equinoxes and solstices seem to anticipate their timing, not because the sphere of the fixed stars moves to the east, but rather the equatorial circle moves to the west, being at an angle to the plane of the ecliptic in proportion to the declination of the axis of the terrestrial globe.”

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Book:On the Revolutions of the Heavenly Spheres
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“The volumes, the surfaces, the lines-in one word, the structures that build a tectonic construction-do not represent the whole picture: there is also the movement that animated and still animates these bodies because the history continues and we live under no particular privileged conditions at any given time in this great process.”

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“Thus we conclude, that the strata both primary and secondary, both those of ancient and those of more recent origin, have had their materials furnished from the ruins of former continents, from the dissolution of rocks, or the destruction of animal or vegetable bodies, similar, at least in some respects, to those that now occupy the surface of the earth.”

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Book:Biographical memoir. Illustrations of the Huttonian theory of the earth
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