CHAPTER V. 



GASES AND LIQUIDS PRESSURE OF THE AIR EXPERIMENTS. 



WE have more than once referred to the pressure of the air which exerts 

 a great influence upon bodies in motion, but a few experiments will make 

 this more obvious, and clearly demonstrate the fact. We have also told you 



Fig. 38. Blowing an egg from one glass to another. 



some of the properties of Solids, such as Weight, Inertia, Friction, and Resist- 

 ance, or Strength. Solids also, as we have seen, occupy space, and cannot 

 be readily compressed, nor bent to other shapes. Now the subject of the 

 Pressure of the Air leads us to the other forms of Matter ; namely, Gases 

 and Liquids, which will be found very interesting to study. 



The force of air can very soon be shown as acting with considerable 



