Note 267 — IS THE GREAT PYRAMID OF GIZEH A METROLOGICAL MONUMENT?
Reading edition
The diameter of the earth in latitude 30° is really about 20 miles longer than the polar axis. But Mr. Taylor obviously did not know the nature of the spheroidal arcs of the meridian, and so falls into the most inconsistent assertions respecting the length of this particular diameter. Thus, in pp. 75 and 87, he asserts the diameter in latitude 30° to be 500,000,000 inches [that is = 7891·414 miles], which is 7·756 miles less than the polar axis—the least diameter of all; whereas, in p. 95, he states this diameter in lat. 30° to be 17·652 miles greater than the polar axis.