TABLE OF CONTENTS xv 



CHAPTER PAGE 



XIII. ORDER, NUMBER, QUANTITY 253 



Order: Empirical Foundation 254 



Order: Operational Derivation 256 



Order: Scientific Content 257 



Number: Empirical Foundation 260 



Number: Operational Derivation 266 



Number: Scientific Content 267 



Quantity: Empirical Foundation 271 



Quantity: Operational Derivation 274 



Quantity: Scientific Content 276 



XIV. SPACE, TIME 279 



Newtonian Time and Euclidean Space 281 



Empirical Space and Time 289 



Space and Time: Operational Derivation 296 



Space-Time 303 



XV. MOTION, FORCE, MATTER 312 



Motion: Empirical Foundation 313 



Motion: Scientific Content 317 



Motion: Operational Derivation 321 



Force: Empirical Foundation 323 



Force: Scientific Content 327 



Force: Operational Derivation 331 



Matter: Empirical Foundation. ....... 337 



Matter: Scientific Content 341 



Matter: Operational Derivation 343 



XVI. LAW, CAUSE 347 



Law: Empirical Foundation 348 



Law: Operational Derivation 355 



Law: Scientific Content 366 



Indeterminism 376 



PART THREE 

 SPECULATIVE PROBLEMS 



XVII. GENERAL CHARACTER OF SPECULATIVE PROB- 

 LEMS 387 



The Main Speculative Problems 388 



Characteristic Features of Speculative Problems . . . 394 



XVIII. THE CLASSIFICATION OF THE SCIENCES ... 399 



General Character of the Problem 399 



Difficulties in the Classification of the Sciences . . . 403 



