Books
- Ludwig Hopf, Introduction to the Differential Equations of Physics. Translated by Walter Nef. New York: Dover Publications, 1948.
Read more about this topic: Ludwig Hopf
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“Our books of science, as they improve in accuracy, are in danger of losing the freshness and vigor and readiness to appreciate the real laws of Nature, which is a marked merit in the ofttimes false theories of the ancients.”
—Henry David Thoreau (1817–1862)
“The book borrower of real stature whom we envisage here proves himself to be an inveterate collector of books not so much by the fervor with which he guards his borrowed treasures and by the deaf ear which he turns to all reminders from the everyday world of legality as by his failure to read these books.”
—Walter Benjamin (1892–1940)
“The study of tools as well as of books should have a place in the public schools. Tools, machinery, and the implements of the farm should be made familiar to every boy, and suitable industrial education should be furnished for every girl.”
—Rutherford Birchard Hayes (1822–1893)