CONTENTS xi 



CHAPTER XXIV 



PACK 



Addition and Subtraction of Vectors 426 



The Scalar Product of Two Vectors . .436 



The Mathematical Representation of a Vector . . . 438 

 The Vector Product of Two Vectors . ... 443 



CHAPTER XXV 



The Straight Line Law . 446 



The Laws y=a+ bx n , y = b(x +a) n , y=a + be . . 452 

 Determination of Constants . 456 



ANSWERS .463 



INDEX 484 



