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BECQUEREL Henri (1852-1908)
The item was sold for 3 900 €
Fees include commission and taxes.
BECQUEREL Henri (1852-1908)
2 autograph MANUSCRIPTS, Atmosphere Lesson 1 and Atmosphere Lesson 2| 1 page 3/4 in-fol. each.
Lesson plans, with marginal sketches.
Lesson 1. "Radius of the earth - 6,366,400 kilos.
- Surrounded by air - Gas mixture. The atmosphere is not indefinite - If we don't know exactly its limits we know its weight. We will see later how various phenomena assign a probable limit to the limited height of the atmosphere" . He evokes some pioneers in the work on atmospheric pressure: Galileo, Descartes,
Torricelli, Pascal, Otto de Guericke| he notes various headings - "Expansion of a bladder in a vacuum - Archimedes' Principle - Baroscope", etc... -as well as some formulas: "(4 Ho - 4 H) = Kn", etc.
2nd lesson. "Measuring heights with the barometer.
K (x - xo) = Log Ho - Log H". The pressure decreases faster than the Height increases.
The temperature of both stations must be taken into account. À 7000 - 32. À 8500 - 26 ¼.
The law of decrease varies with latitude.
Laplace's formula [...] Tables are used.
The two observations must be comparable and must be protected from diurnal and accidental variations"... And to propose another method of determining pressure, illustrating his notes with a sketch of a hypsometric thermometer... Notes on the composition of the atmosphere follow...
2 autograph MANUSCRIPTS, Atmosphere Lesson 1 and Atmosphere Lesson 2| 1 page 3/4 in-fol. each.
Lesson plans, with marginal sketches.
Lesson 1. "Radius of the earth - 6,366,400 kilos.
- Surrounded by air - Gas mixture. The atmosphere is not indefinite - If we don't know exactly its limits we know its weight. We will see later how various phenomena assign a probable limit to the limited height of the atmosphere" . He evokes some pioneers in the work on atmospheric pressure: Galileo, Descartes,
Torricelli, Pascal, Otto de Guericke| he notes various headings - "Expansion of a bladder in a vacuum - Archimedes' Principle - Baroscope", etc... -as well as some formulas: "(4 Ho - 4 H) = Kn", etc.
2nd lesson. "Measuring heights with the barometer.
K (x - xo) = Log Ho - Log H". The pressure decreases faster than the Height increases.
The temperature of both stations must be taken into account. À 7000 - 32. À 8500 - 26 ¼.
The law of decrease varies with latitude.
Laplace's formula [...] Tables are used.
The two observations must be comparable and must be protected from diurnal and accidental variations"... And to propose another method of determining pressure, illustrating his notes with a sketch of a hypsometric thermometer... Notes on the composition of the atmosphere follow...