Vlll CONTENTS. 



CHAP. pack 



V. PHYSIOLOGICAL INTEGRATION IN PLANTS ... ... 275 



VI. — DIFFERENTIATIONS BETWEEN THE OUTER AND INNER 



TISSUES OF ANIMALS ... ... ... 282 



VII. DIFFERENTIATIONS AMONG THE OUTER TISSUES OF 



ANIMALS ... ... ... ... 291 



fill. DIFFERENTIATIONS AMONG THE INNER TISSUES OF 



ANIMALS ... ... ... ... 310 



IX. PHYSIOLOGICAL INTEGRATION IN ANIMALS... ... 365 



X. — SUMMARY OF PHYSIOLOGICAL DEVELOPMENT ... 377 



PABT VI.— LAWS OF MULTIPLICATION 



I. THE FACTORS ... ... ... ... 391 



II. A PRIORI PRINCIPLE ... ... ... ... 397 



III. OBVERSE A PRIORI PRINCIPLE ... ... ... 404 



IV. DIFFICULTIES OF INDUCTIVE VERIFICATION ... 412 



V. ANTAGONISM BETWEEN GROWTH AND ASEXUAL GENESIS 419 



VI. ANTAGONISM BETWEEN GROWTH AND SEXUAL GENESIS 428 



VII. ANTAGONISM BETWEEN DEVELOPMENT AND GENESIS, 



ASEXUAL AND SEXUAL ... ... ... 440 



VIII. ANTAGONISM BETWEEN EXPENDITURE AND GENESIS ... 446 



IX. COINCIDENCE BETWEEN HIGH NUTRITION AND GENESIS 454 



X. SPECIALITIES OF THESE RELATIONS ... ... 463 



XI. INTERPRETATION AND QUALIFICATION ... ... 470 



XII. MULTIPLICATION OF THE HUMAN RACE ... ... 479 



XIII. HUMAN POPULATION IN THE FUTURE ... ... 494 



APPENDICES. 



A. SUBSTITUTION OF AXIAL FOR FOLIAR ORGANS IN PLANTS 511 



B, A CRITICISM ON PROF. OWENS THEORY OF THE VER- 

 TEBRATE SKELETON ... ... ... 517 



C. — ON CIRCULATION AND THE FORMATION OF WOOD IN 



PLANTS ... ... ... ... 530 



