II. Extension not Perceptible as the Direct and Immediate Object of Sensations 345 III. Scientific Fruitfulness of the Idea of Extension 348 IV. Reality of Extension 357 V. Geometrical Exactness Realized in Nature 360 VI. Remarks on Extension 365 VII. Space.--Nothing 369 VIII. Descartes and Leibnitz on Space 375 IX. Opinion of those who attribute to Space a Nature distinct from Bodies 380 X. Opinion of those who hold Space to be the Immensity of God 382 XI. Fenelon's Opinion 386 XII. What Space consists in 391 XIII. New Difficulties 396 XIV. Another Important Consequence 400 XV. Illusion of Fixed Points in Space 403 XVI. Observations on Kant's Opinion 407 XVII. Inability of Kant's Doctrine to solve the Problem of the Possibility of Experience 415 XVIII. The Problem of Sensible Experience 418 XIX. Extension abstracted from Phenomena 421 XX. Are there Absolute Magnitudes? 427 XXI. Pure Intelligibility of the Extended World 432 XXII. Infinite Divisibility 436 XXIII. Unextended Points 439 XXIV. A Conjecture on the Transcendental Notion of Extension 442 XXV. Harmony of the Real, Phenomenal, and Ideal Orders 446 XXVI. Character of the Relations of the Real Order to the Phenomenal 450 XXVII. Whether every Thing must be in some Place 452 XXVIII. Contingency of Corporeal Relations 459 XXIX. Solution of two Difficulties 462 XXX. Passive Sensibility 466 XXXI. Possibility of a greater Sphere in active Sensibility 469 XXXII. Possibility of the Penetration of Bodies 480 XXXIII. A Triumph of Religion in the Field of Philosophy 483 XXXIV. Conclusion and Summing up 489 NOTES TO BOOK FIRST 495 NOTE TO BOOK SECOND 514