human
Cornell's Geography there is an
gpt
Illustrated proof of the Form of the Earth. A curved line on which is represented a ship in four positions, as she sails away from an observer, is an arc of 72 degrees, or one-fifth of the supposed circumference of the
human
--about 5,000 miles. Ten such ships as those which are given in the picture would reach the full length of the
gpt
making 500 miles as the length of the ship. The man, in the picture, who is watching the ship as she sails away, is about 200 miles high; and the tower, from which he takes an elevated view, at least 500 miles high. These are the proportions, then, of men, towers, and ships which are necessary in order to see a ship, in her different positions, as she
human
of the
gpt
over which she is supposed to be sailing: for, it must be remembered that this supposed