Capillarity Apparatus
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All you need to do is add colored water
to the reservoir tube of the apparatus to
show how water ascends into spaces
by capillary action. The water levels
will vary in the four different diameter
glass tubes, actually rising above the
reservoir level in the narrower tubes.
The one-piece glass unit is firmly
supported in a metal base. Size: 5 1/2
x 4 3/4.