| We
made a barometer from a plastic tube partly filled with water (colored
with log wood to make it easier to read). The top of the tube was
bent over and sealed-off by binding with wire. The bottom of the tube
went into a jam jar of water filled to a constant level. As the air
pressure changed it applied a change in force on the water in the
jam jar which changed the height of the liquid in the tube. Changes
in height of the liquid in the tube therefore showed changes in air
pressure. |
Jonathan and his
barometer |
