CONTENTS. 



PART I. 



MECHANICS. 



CHAPTER I. 



INTKODUCTION. 



Page 



Benefits of Mechanical Knowledge 13 



CHAPTER n. 



GENERAL PKINCIPLES OF MECHANICS. 



SECTION I. 



General Properties of Matter 18 



Divisibility 18 



Impenetrability 20 



Indestructibility 20 



Inertia 21 



SECTION II. 



Momentum, or Inertia of moving Bodies 24 



The Fly-wheel 27 



Application of Fly-wheel in churning and cutting Straw 28 



Estimating the Quantity of Momentum 30 



SECTION III. 



Compound Motion 31 



Centrifugal Force 34 



CHAPTER HI. 



ATTRACTION. 

 SECTION I. 



Gravitation 35 



Measuring Velocity of falling Bodies — Atwood's Machine 38 



