Einstein's Pen
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Einstein's pen is a fountain pen that was gifted in 1921 to Paul Ehrenfest, then the director of the physics faculty of Leiden University. The pen is now on display in the Leiden Museum Boerhaave in the Netherlands.
This pen was gifted to Ehrenfest as a thank you gift for the friendship that he and Einstein shared, and because Ehrenfest created a professorship for Einstein. Einstein was a 'bijzonder hoogleraar', meaning a professor by special appointment made possible by the Leids Universiteits Fonds from 1920 up to officially 1946. In the first half of his appointment he visited Leiden regularly to give lectures.[1]
There is a note with the pen on which is written (In Dutch): 'This pen has been used for years by Einstein, especially during the time between 1912 and 1921 - So that all his designs and calculations relating to general relativity and gravity from this time period are written with this pen. He gave this pen to me in 1921. P. Ehrenfest. '[2]
Referenties[edit]
- ↑ "Einstein in Leiden". Leiden: Universiteit Leiden. Retrieved 29 April 2015.
- ↑ "Vulpen van Einstein met briefje van Ehrenfest (Dutch page on the pen)". Leiden: Museum Boerhaave. Retrieved 29 April 2015.
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