Foucault, Léon, physicist (1819-1868). Autograph letter signed ("L. Foucault").
[Paris], 25 Dec. 1858.
8vo. 3¾ pp. on bifolium.
€ 2,500.00
To an unnamed recipient, asking if his newly designed telescope would soon be ready to go on a world tour.
Folds, browned.