THE PRESSURE OF THE AIR SHOWN BY A WINE-GLASS.
Place a card on a wine-glass filled with water, then invert the glass; the water will not escape, the pressure of the atmosphere on the outside of the card being sufficient to support the water.
Place a card on a wine-glass filled with water, then invert the glass; the water will not escape, the pressure of the atmosphere on the outside of the card being sufficient to support the water.