Zwaartekracht: de richting van de zwaartekracht(Gravity: the direction of gravity is that of the lead wire, it is perpendicular to the surface of the still waters, the vertical. At two points far from Earth, two lead wires can be said to be parallel. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
€ 106.98
Enthält 9% MwSt.
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Niet gedateerd · Engraving
· Afbeelding ID: 918713
Private Collection / Bridgeman Images |
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