Note 181 — Chapter XIII · THE EXACT MEASUREMENT OF PHENOMENA.
Reading edition
Outlines of Astronomy, 4th ed. sect. 781, p. 522. Results of Observations at the Cape of Good Hope, &c., p. 37.
Reading edition
Outlines of Astronomy, 4th ed. sect. 781, p. 522. Results of Observations at the Cape of Good Hope, &c., p. 37.