80 
14. 
15. 
16. 
THE LEMON 
gently and see how leathery it is. Perhaps you 
can see now why the lemon has no pinch-sound. 
Take this strip of skin with the yellow side up and 
bend it gently between your thumb and finger 
until it is nearly doubled, and then give it a quick, 
hard pinch. Tf you do this rightly, a fine spray 
flies into the air. 
Hold it against the light and watch the spray fly. 
Do this a number of times, but remember that 
you have to pinch the peel in a new place each 
time if you want to see it. 
Now look at your fingers and see if any of the spray 
has been squeezed out upon them. Rub them 
together. Simell them. 
The problem-is to discover what the spray is. 
Hold a piece of paper so that the spray will fly out 
upon it. Does it mark the paper? Does it stay 
on the outside of the paper, or sink in? 
Hold the paper up to the ight. What do you see? 
[It will save time and subsequent cleaning up of juice if the teacher 
has previously prepared slices of lemon peel by skinning several 
lemons and gives out two small strips to each child. ] 
Hold the yellow side down and squeeze some spray 
into the glass of water. Now if you set the glass 
on the side of your desk nearest the light and 
