Fig. 6.—Swinging the glass.
Fig. 7.—The action completed.
After one complete revolution the glass should be as shown by [Fig. 7]; whilst in this position it may be placed on the table. At first it is advisable to practice this experiment with water, but, as more skill is acquired, other liquids, such as milk or wine, may be used as occasion permits.
Fig. 8.—The spoon mirror.
A Novel Mirror
A simple method of illuminating the back of the mouth and throat, especially when throat trouble is suspected, may often be found extremely useful. Here is a means of supplying, at a moment’s notice, an extemporized illuminant of this kind.
Take a well-cleaned spoon, and hold it against a candle flame, when you form an excellent mirror, which will permit you to concentrate the rays of light and produce at the back of the throat enough illumination for the making of a careful examination ([Fig. 8]).
A silver spoon, moreover, allows you to study the curious properties of curved mirrors. Holding the hollow part of the spoon before your face, notice that the head is at the bottom; turn the spoon round, and you have the bulging part a convex mirror, which will show an image, very long and narrow. If you approach this face in the spoon little by little, you will see the nose attain the most amusing proportions.