FIG. 66
MOUNTING THE SPIRIT LEVEL
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Heat the small part of 4, without heating the
alcohol, and close the tube (6). Now attach the level to a smooth
board as 2 or 3, Fig. 66, mark the center of the bubble, and your spirit
level is ready for use.
Experiment 47. To make a fountain-pen filler.
Attach a rubber coupling to the large end of one
of your No. 4 nozzles, close the other end of the coupling with a glass
plug, and your fountain-pen filler is made (Fig. 67).
To make the plug, close one end of a piece of
No. 4 tubing, allow it to cool, cut off to a length of 1 inch and smooth
the rough edges. Insert the closed end of this plug into the rubber
coupling.
Practice using the filler by drawing up and
shooting out water.
FIG. 65
A FOUNTAIN-PEN FILLER
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Experiment 48. To make a syringe.
Take a half length of No. 6 tube and smooth
both ends in the lamp flame or blowpipe flame.
Now to make a plunger: Cut an 8½-inch
length of No. 2, smooth one end, close the other end and blow a
slight bulb. When cold, wet the closed end and insert it into small
wet rubber coupling.
Note: Always grasp a tube near the
end when you insert it
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