...atmosphere. These are common experiment* performed before classes wiA the air-pump. 611. The barometer shows that the pressure of the atmosphere at the level of the sea, under ordinary circurostancps, supports a column of mercury about 30 inches in heigbt, though varying...

...frequently called the vacuum; Gjiierickian vacuum, from Otto von Guericke, who first invented the air-pump. The pressure of the atmosphere at the level of the sea will support a column of mercury 30 inches high. Now, if we suppose the bore of the tube to have a cross-section...

...frequently called the vacuum; Guerickiaii vacuum, from Otto von Guericke, who first invented the air-pump. The pressure of the atmosphere at the level of the sea will support a column of mercury 30 inches high. Now, if we suppose the bore of the tube to have a cross-section...

...any change of temperature, and to what amount, during the interval.' From this voyage we learn also that the pressure of the atmosphere at the level of the sea is not the same in every part of the globe. Barometrical observations show that this pressure increases...

...frequently called the vacuum; Guerickian vacuum, from Otto von Guericke, who first invented the air-pump. The pressure of the atmosphere at the level of the sea will support a column of mercury 30 inches high. Now, if we suppose the bore of the tube to have a cross-section...

...any change of temperature, and to what amount, during the interval.' From this voyage we learn also that the pressure of the atmosphere at the level of the sea is not the same in every part of the globe. Barometrical observations show that thi§ pressure increases...

...other means, and with much less expense and trouble. 229. Amount of the Atmospheric Pressure.—We have seen above that the pressure of the atmosphere...mercury very nearly ; by which we learn that this is the amount of the atmospheric pressure upon each square inch of the earth's surface. And as it is the...

...determine these incessant changes, and has rendered very essential service to science. It has determined that the pressure of the atmosphere at the level of the sea supports a column of mercury from 29 to 30 inches in length all over the world, and that as we ascend,...

...different latitudes from a standard of 30 inches. Tables V ahd VI are calculated on the hypothesis that the pressure of the atmosphere at the level of the sea is 30 inches. Observations prove that the mean pressure varies in different latitudes, and according...

...different latitudes from a standard of 30 inches. Tables V ahd VI are calculated on the hypothesis that the pressure of the atmosphere at the level of the sea is 30 inches. Observations prove that the mean pressure varies in different latitudes, and according...