I am busy just now again on electro-magnetism, and think I have got hold of a good thing, but can't say. It may be a weed instead of a fish that, after all my labour, I may at last pull up. A History of Physics in Its Elementary Branches: Including the Evolution of ... - 237. lappuse autors: Florian Cajori - 1899 - 322 lapas Pilnskats -
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