Now heat the edge of the hole and the end of
the short piece in the lamp flame, and make a joint (2,
Fig. 76) exactly as described in
Experiment 53.
Be particular to heat and blow all around the joint at least three times
to make the glass uniform, and on the last blowing leave the joint a
little larger than the tube. Cut off the closed ends, make the arms
equal in length, smooth the
FIG. 80
MAKING A Y
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ends, and your tee is made (3, Fig. 76).
Your first attempt may not be beautiful, but
if you will repeat the heating and gentle blowing often enough, the
joint will be strong, which is the main point.
Repeat until you can make a tee easily.
Make a tee with No. 2 tubing.
Your flame is hardly large enough to make a
tee with No. 6 tubing.
Experiment 57. A three-armed siphon.
Make a three-armed siphon as shown in
Fig. 77. Put two arms in tumblers filled with water,
suck air out of the third arm until the water runs, and then out it in
an empty tumbler.
Stand the three tumblers on the table. Does
the water run until the levels are the same?
Put one tumbler on a book. Does the water run
into the other two tumblers until the levels are the same?
Return the one tumbler to the table and put
the other two on
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