LABORATORY MANUAL FOR WORK IN 

 GENERAL SCIENCE 



EXERCISE 1 1 > ' ^ j ;;.";';> >',>< A 

 DOES AIR OCCUPY SPACE? 



Materials. A jar, a deep pan, or a pail ; a drinking glass. 



Directions. In a large jar or other available vessel pour water until the vessel is about three 

 fourths full; then hold a drinking glass mouth downward in the hand and while holding it in this 

 position, push it into the water until it is entirely covered with water. 



Does the water fill all of the space within the glass ? 



Tilt the glass to one side, and observe what occurs. Hold the glass in a vertical position again, 

 and observe the level of the water inside. Do these observations help to solve the problem of this 

 exercise ? 



Additional problem. What is a diving bell, and how does it work ? 



1 As stated hi Directions to Students, page xi, each pupil should note exactly what is done in the performance of an ex- 

 periment, and should observe what occurs, then try to explain what has occurred. The blank space following the directions 

 is for use in recording these facts by means of sketches and descriptions. 



[1] 



