282 

 291 

 310 



Vlll CO.VTENTS. 



CHAP. PAO« 



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



VL — DIFFERENTIATIONS BETWEEN THE OUTER AND INNER 

 TISSUES OF ANIMALS 



?TI. DIFFERENTIATIONS AMONG THE OUTER TISSUES OF 



ANIMALS 

 Vlll.— DIFFERENTIATIONS AMONG THE I^sNER TISSUES OF 

 ANIMALS 

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



X. — SUMMARY OF PHYSIOLOGICAL DEVELOPMENT ... 377 



PART YI.— LAWS OF MULTIPIJCATION 



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 



VIIL — 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 



h. A CRITICISM ON PROF. OWEN's THEORY OF THE VER- 

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



C. — ON CIRCULATION AND THE FORMATION OF WOOD IN 



PLANTS ... ... ... ... 536 



