surface of the lake is lowered to such a degree as at last to prevent the water from overflowing the barrier. Finally the lake quiets itself, the gases slowly disappear by earth absorption, and by escape from the volcanic exit, and for an unrecorded period of time thereafter the surface of the lake continues to rise slowly as it is doing now." [9] This view is supported in theory by a note I believe to have somewhere seen recorded. Elsewhere other bases are mentioned also.--J. U. L. "But what has this phenomenon to do with the volcano?" "It produces the eruption; the water that rushes down into the chasm, partly as steam, partly as gas, is forced onward and upward through a crevice that leads to the old crater of the presumed extinct but periodically active Mount Epomeo. These gases are intensely heated, and they move with fearful velocity. They tear off great masses of stone, which the resultant energy disturbances, pressure, gas, and friction, redden with heat. The mixture of gases from the decomposed water is in large amount, is burning and exploding, and in this fiery furnace amid such convulsions as have been described, the adjacent earth substance is fused, and even clay is melted, and carried on with the fiery blast. Finally the current reaches the earth's surface through the funnel passage, the apex of which is a volcano--the blast described a volcanic eruption." "One thing is still obscure in my mind," I said. "You assert that the reaction which follows the contact of the flowing water and metallic bases in the crevice below us liberates the explosive gases, and also volumes of vapor of water. These gases rush, you say, and produce a volcanic eruption in a distant part of the crust of the earth. I can not understand why they do not rush backward as well, and produce another eruption in Kentucky. Surely the pressure of a gas in confinement is the same in all directions, is it not?"