Ⅰ．GRAPHS AND CHARTS 1
Ⅱ．THE STRAIGHT LINE LAW 27
Ⅲ．THE LAW OF THE PARABOLA 67
Ⅳ．LOGARITHMS 98
Ⅴ．ARITHMETICAL AND GEOMETRICAL PROGRESSION 136
Ⅵ．THE EXPONENTIAL LAW 160
Ⅶ．THE POWER LAW 208
Ⅷ．CURVE FITTING 226
Ⅸ．PERMUTATIONS,COMBINATIONS,AND PROBABILITY 279
COMMON LOGARITHMS 308
INDEX 311
ANSWERS 317