Experiment 60. A four-arm siphon.
Make a four-arm siphon, repeat the experiments
described in Experiment 57, and make others of your
own.
Experiment 61. To make a Y.
Make a tee as in Experiment 56,
then make a bend about ½ inch from the stem on each side
(Fig. 80), and your Y
is complete.
Experiment 62. Balancing columns.
Arrange the apparatus as in
Fig. 81, put the arms together in a glass of water,
suck a little air out of the top coupling and close it with a glass plug.
Do you find that the water rises to the same level in each?
Place the arms in separate tumblers filled
with water to the same level and repeat. Does the water rise to the
same level?
FIG. 82
THE WATER LEVELS ARE THE SAME
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Add an extra length to one arm and repeat.
Are the levels different but are they equal distances above the water
in their respective tumblers?
Place the tumblers on the table, make one tube
slanting, and repeat the experiment (Fig. 82). Are the levels again
the same?
When you suck air out of the tee, you decrease
the air
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