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MAKING A BAROMETER - Level 1

EXPERIMENT 14

Equipment:

• Glass barometer tube 36" long, closed at one end
• Small glass or beaker
• Mercury or colored water
• Ring stand with clamp
• Cardboard strip, 2" x 10"
• Scotch or masking tape
• Yardstick

Pour the mercury into the barometer tube, filling it completely. Pour the remaining mercury into a beaker. Place a finger over the open end of the tube and invert the tube, lowering it carefully into the beaker containing the remainder of the mercury. Clamp the tube upright on the stand.

Mark a scale of inches and half inches on the cardboard, and label it from 24 to 36 inches. With the yardstick, measure the actual height of the mercury column and attach the scale to the proper spot on the tube.

Watch the day-to-day variations in the height of the mercury. Record your readings. Compare them with radio and newspaper reports of local barometric pressure conditions.

NOTE: Be very careful that the mercury does not come in

contact with any jewelry you may be wearing.

Send all comments to aeromaster@eng.fiu.edu
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From Raytheon Aviation Educational Materials

Updated: February 23, 1999