part 11

121 Seeing and hearing and touch are three of our senses. We get knowledge through our eyes (seeing), through our ears (hearing), and through our fingers (touching). These are three of our chief senses. Another sense is taste. This is a man's tongue These are his lips. This is his chin. The chief work of the tongue is tasting. Here is some white powder on a plate. It may be salt or it may be sugar. Which is it— salt or sugar? She is tasting the powder. She has some of it on her finger. She is putting some of the powder on her tongue. She is tasting it.

122 We get salt from the sea. The water in the sea has salt in it. We get salt from salt mines. Some mines are deep. They go far down into the earth. We get sugar from plants. We get it from the stems of some plants. We get sugar from the roots of some plants. The salt or sugar which we put in our food is a white powder.

123 The taste of sugar is sweet. This is a cake. It has white sugar on the top. Cakes with sugar on them are very sweet. This is an orange. This is its skin. Some oranges are sweet. But the taste of their skin is bitter. Salt has a salt taste. Sugar has a sweet taste. To the eye salt and sugar seem the same. But to the tongue they are very different. Their taste is very different.

124 What is the work of the nose? What do we do with our noses? She has a flower in her hand. She is smelling the flower. Some flowers have a sweet smell. Some flowers have no smell. This is grass. These flowers are in a garden. They have a sweet smell. These are pigs. Some pigs are dirty. Some pigs are clean. (See page 5.) The smell of dirty pigs is not sweet. It is a bad smell. This is smoke. This is a fire. Some smoke has a good smell. The smell may not be sweet, but it may be a good smell. He is smoking a pipe. Is the smell of the smoke good?

125 We see things with our eyes and we see their colors. Here are some names of colors: green blue white red yellow gray What is the color of grass and leaves in spring? Grass and leaves in spring are green. What is the color of this girl's lips? Her lips are red. The sky is blue. It is blue when it is clear. The color of some clouds is white. Other clouds are gray. The sun is yellow. Sometimes when it is going down or coming up it is red. This flame is yellow.

126 We see things with our eyes. We see the sizes and colors of things. Sometimes things seem to our eyes greater or smaller than they are. They are not what they seem. This man is tall. This man is short. This is a tall woman. This is a short woman. Here are two men. Do they seem the same size? Which of them seems taller? Does the man who is farther seem taller than the man who is nearer? The pictures of them are the same size. The lines in the picture make the man who is nearer seem shorter.