3 ms·
FWIW, I got that from https://en.wikipedia.org/wiki/1759_in_science https://en.wikipedia.org/wiki/1759_in_science (search for "H4").
by abecedarius 11y ago
FWIW, I got that from https://en.wikipedia.org/wiki/1759_in_science https://en.wikipedia.org/wiki/1759_in_science (search for "H4").