Note 22 — DEVELOPMENT OF GRAVITY PENDULUMS IN THE 19th CENTURY
Reading edition
Bessel used as a standard of length a toise which had been made by Fortin in Paris and had been compared with the original of the “toise de Peru” by Arago.
Reading edition
Bessel used as a standard of length a toise which had been made by Fortin in Paris and had been compared with the original of the “toise de Peru” by Arago.