Henri BECQUEREL. Autograph manuscript, 20 pp. in-folio, 1881 - Lot 126

Lot 126
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4000 - 5000 EUR
Henri BECQUEREL. Autograph manuscript, 20 pp. in-folio, 1881 - Lot 126
Henri BECQUEREL. Autograph manuscript, 20 pp. in-folio, 1881. "Physique terrestre et météorologique - Cours du Muséum 1881". Outline of 10 lessons, with margin sketches and mathematical formulas: Atmosphere (1st lesson), atmosphere (2nd lesson), atmosphere (3rd lesson), winds (4th lesson), winds and gusts (5th lesson), climates, hygrometry (7th lesson), evaporation (8th lesson), fog-clouds (9th lesson), rain-ice (10th lesson). "The earth is a spheroid of approximately 6,366.4 k. Surrounded by air (mixture of gases). Not indefinite. If we don't know its limits, we know its weight. We'll see later what considerations allow us to assign the atmosphere a probable height of around 80 kilograms. Weight of the atmosphere. Pressure in fluids. Toricelli's experiment, 1643. Height 76c Historical background. Florence fountains 10.33 m of water. Galileo found that air was heavy by compressing air in a balloon and weighing it. Descartes announced that mercury would rise less [...]. Pressure decreases as one rises in the atmosphere (Pascal 1647). Approximately 1 mm per 10 m near the surface. Pressure decreases faster than height increases. K(x-x0)=LH0-LH. The temperature of the 2 stations T+T'/2 must be taken into account. Height varies with latitude. Laplace's formula x=18393(1-0.02837cos2l)(1+2(T+t)/1000)logH/h [...]".
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