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Anyway, in 50 years of research I have frequently cited work in books and jounals of which I don't own personal copies. Research would be impossible otherwise. The thing is, though, that unlike you I know about libraries and how to use them. That was surely true of Einstein as well. If you belong to an appropriate institution that's not expensive, it's free.Sure, that is certainly possible.
I have never worked in a patent office, but I feel sure that the work would include studying what had already been described. For that, access to a library would be essential.
No, of course.>Are you serious? Electric lighting was widespread by the beginning of the 20th century, and had probably reached Switzerland by then.
It was also a lot to write, but without any kind of aid. Usual tools were pens (or ocasionally feathers and ink).
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Since only nights were left over for free thinking, he had to write his masterpieces at the kitchen table, lit by candle light
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