The Magdeburg Sphere is weighed before and after having the air pumped out. The sphere holds about .8 g of air. Depending on how long the vacuum pump runs .6 g or more of air can be removed.
1 Weigh the Magdeburg Sphere.2 Remove base of Magdeburg Sphere.3 Remove air from the Magdeburg Sphere with the vacuum pump.4 Reconnect the base to the Magdeburg Sphere.5 Place the Magdeburg Sphere on the scale and watch the scale tilt.6 Weigh again.
Magdeburg Spherevacuum pump (Dn4)