laid lengthwise between the entire length of the two thumbs, one end of the grass extending beyond the tops of the thumbs and the other below at the wrist line.
Certain tribes of people are experts in forming
Sea-shells
into musical instruments, but for you the shell need not be altered. Take it as it is, and holding the pretty thing to your ear, listen while the shell tells of the far-away blue
Fig. 500. sea, which, singing gently, imparts to her children, the shells, power to transmit the sound of murmuring waves to those who will listen to the voice.
The Musical Fountain
is one of the prettiest and most interesting experiments and is a very simple one. Remember, you must use a goblet for the purpose, not a tumbler, as the latter will not work well. Choose a goblet of very thin glass, fill it almost full of water, dip the end of your finger in water and rub the edge of the glass quickly around and around until it rings with a humming sound. You will soon find the surface of the water shivering and wrinkling up its face in tiny waves, then it will become greatly agitated, sending up wee streams and drops of water. Wet your finger again and keep on with the circular motion until a little fountain of fine spray shoots up into the air, accompanied by the musical sound from the glass (Fig. 500).
CHAPTER XX
WHAT TO MAKE OF EMPTY
SPOOLS
