Realm of Science April 20th 1915
Rigge, William F., S.J.
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First Paragraph: That astronomy habitually deals with numbers, distances and quantities that stagger our ordinary imagination, is a fact now quite universally conceded by the general reader. While he is favorably disposed to grant almost everything that astronomy demands, there are some things, however, at which, what he calls his inborn common sense, rebels, and which seem to him impositions upon his credulity. One of these things refers to the constitution of the earth’s interior. When the highest mountains are less than six miles high, and the deepest oceans less than ten miles deep, thus giving us a total range of only sixteen miles out of the four thousand that lie between us and the earth’s centre, it seems the height of rashness and precipitation to pretend to judge upon the constitution of the immense interior and unexplorable regions that must forever remain to us a terra incognita.