Make a tee as in Experiment 56, but do not cut off the closed ends. Now attach a fourth arm, as in Fig. 79, and heat and blow gently as before to work the glass into uniform condition. Cut off the closed arms at equal lengths, smooth the ends, and your four-way junction is made.
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