The blue cloth cover of the book has a stylized impression of a tree (a tree of knowledge?) with the following text in an arts-and-crafts style font: "LESSoNS IN PHYSICS HIGGINS ------- GINN & COMPANY"

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1. Robert McNees (mcnees@mastodon.social)'s status on Monday, 19-Dec-2022 17:00:26 UTC Robert McNees

   in reply to

   Michelson and Morley knew what they were looking for and how to measure it; it just wasn’t there. But faced with this null result, which Michelson and Morley continued to refine, physicists still clung to the idea of an aether. How else could you have waves?

   Here is a page from "Lessons in Physics," a textbook written by Lothrop Higgins in 1903 – over 15 years after the Michelson-Morley experiment! – that presents the aether as a matter-of-fact.