From Scientific America

Date early 20^th Century

ARISTOTLE’S PROOFS THAT THE EARTH IS A GLOBE AND VOLIVA’S REFUTATIONS

The changing aspect of the heavens in different latitudes, some stars appearing and other disappearing, proves the earth is round. Or does it? “The stars are set in a hemispherical dome so close to the earth that all cannot be seen at the same time,” is Voliva’s explanation of this point.