The earliest paper back in the collection, the 1931Albert and Charles Boni printing, is hard to find in any condition and commands a premium. It is lavishly illustrated with woodcuts by Howard Simon. This copy is inscribed by Marianne Morrill.
"We all know what an astonishing atmospheric weight we ourselves stand up under; even here, above-ground, in the air; how vast, then, the burden of a whale, bearing on his back a column of two hundred fathoms of ocean! It must at least equal the weight of fifty atmospheres. "
The weight of the column of water on a whale's back is huge, but for the whale it is nothing. It is a trick, however, since the pressures are offset by natural mechanics. Something we humans all do naturally as well.