To reduce bulges in a metal powder-flask, fill it up with Indian corn, or dry peas, of any other sort of hard grain; then pour water into it, and screw down the lid tightly.
We stared, and it dawned on me that I was about to witness a strange scene. Observing the seafloor, I saw that it swelled at certain points from low bulges that were encrusted with limestone deposits and arranged with a symmetry that betrayed the hand of man.