Abstract
I discovered from the experiment cited in Chapter 19 that air does not always have the same weight. I perceived the same result in the experiment with the receiver in which air is weighed (Chapter 21).For when the receiver has been exhausted of all air and has remained hanging in equilibrium for several days in this state, its weight fluctuates and we see that this glass globe is raised or lowered from time to time, something that never occurs with the counterweight suspended on the other end of the balance. We have discussed this observation above in Chapter 20. On this account, I had a sphere the size of a \(\frac{1}{2}\) recipient made of a sheet of copper and provided it with a valve similar to that described in Chapter 8 in place of a stopcock.
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© 1994 Springer Science+Business Media Dordrecht
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Von Guericke, O. (1994). Experiment Showing How Air Pressure Fluctuates According to the Weather. In: The New (So-Called) Magdeburg Experiments of Otto Von Guericke. Archives Internationales D’Histoire Des Idées / International Archives of the History of Ideas, vol 137. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2010-4_78
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DOI: https://doi.org/10.1007/978-94-011-2010-4_78
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