Up: Glassmaking
Gilbert: 38 of 65
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hard (Fig. 59). Do you find that one stream of
water is driven into your face and another out of the nozzle?
Experiment 43. Fun with a trick squirt bottle.
Now to have fun with your trick bottle,
show it to one friend at a time.
FIG. 60
TRICK BOTTLE IN ACTION
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Do not ask him to try the bottle, just go where he can see you and
squirt a long stream, but unknown to him have your finger over the
hole below the bend.
Your friend will just naturally want to have
a try at it. So you say "All right, let's see who can squirt the
longest stream." Tell him that all he has to do is to make a deep
FIG. 61
A SIMPLE ENGINEER'S LEVEL
(From Aldous' Physics. Courtesy of the Macmillan Company)
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breath and blow as hard as he can. He will do so, with laughable
results (Fig. 60).
Now together find another friend. Do not ask
him to blow, but each of you blow as long a stream as you can, where
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