(23.)
Two cubic inches of mercury weigh very nearly one pound avoirdupois.[6] Hence, when the barometric column measures thirty inches, the weight of the atmosphere resting on each square inch of surface is about fifteen pounds.
Two cubic inches of mercury weigh very nearly one pound avoirdupois.[6] Hence, when the barometric column measures thirty inches, the weight of the atmosphere resting on each square inch of surface is about fifteen pounds.