Note 124 — Chapter X · OBSERVATIONAL ASTRONOMY IN THE 18TH CENTURY.
Reading edition
69 miles is 364,320 feet, so that the two northern degrees were a little more and the Peruvian are a little less than 69 miles.
Reading edition
69 miles is 364,320 feet, so that the two northern degrees were a little more and the Peruvian are a little less than 69 miles.