MECHANICS OF THE INNER EAR 9 



at the other opening, B. In our figure we see at a and b 

 the colored clay pressed in first. The part protruding be- 

 yond the outside of the box is cut away. At c we see the 

 white clay pressed in afterwards, and at f the advance guard, 

 so to speak, of the colored clay pressed in last. What has 

 happened within the box is obviously this. The colored clay 

 pressed in first, collects inside the box near A in the direc- 

 tion of B. A corresponding amount of the white clay with 



Fig. 4. An experiment with 

 plastic clay 



which the box was filled has been pushed out through the 

 opening B. The white clay pressed in next forces up the 

 colored clay somewhat as a mass of glass is blown up in a 

 glass factory to form a bottle. This white clay is forced up in 

 turn by the succeeding colored clay, the "bottle" of colored 

 clay increasing its dimensions at the same time. During this 

 whole time and afterwards the total mass moves in the di- 

 rection of B. However, the particles of clay to the left, 



