In a treatise on astronomy, published a little after this in 1581, by Apian and Gemma Frison, they very distinctly state their belief in a round earth, though they do not go into details of its surface. The argument is the old one from eclipses, but the figures they give in illustration are very amusing, with three or four men of the size of the moon disporting themselves on the earth's surface. As, however, they all have their feet to the globe representing the earth, and consequently have their feet in opposite directions at the antipodes, the idea is very clearly shown.
Fig. 36.
"If," they say, "the earth were square, its shadow on the moon would be square also.
"If the earth were triangular, its shadow, during an eclipse of the moon, would also be triangular.
Fig. 37.
"If the earth had six sides, its shadow would have the same figure.
Fig. 38.