| Chemists, and other people who do careful weighings, know
that we live at the bottom of a sea of air, and that a buoyant force equal
to the weight of the air displaced by our bodies acts upward on us. Alas,
the density of air is small, and the buoyant force is also small.
To demonstrate this effect, a glass balloon is placed on one end of an equal arm balance. When the air surrounding the balloon is removed, the buoyant force is removed, and the balance tilts.
This demonstration of the buoyant effects of the atmosphere, ca. 1900, at Denison University in Granville, Ohio is unmarked.