. The causes and course of organic evolution; . at someof his views may find the more ready acceptance, in virtue ofthe melancholy spectacle presented by the nations in thisTwentieth Century of Christs Era. The writer would now make hearty and grateful acknowledg-ment of the kind help and encouragement extended by hisfriends Dr. Henry W. Cattell and Mr. Roberts Le Boutillier,for without their sympathetic aid this volume could not nowhave seen the light. He also expresses sincerest thanks to hisfriend Dr. Joseph Hepburn, who willingly volunteered to re-vise proofs, and by his expert chemical kn
. The causes and course of organic evolution; . at someof his views may find the more ready acceptance, in virtue ofthe melancholy spectacle presented by the nations in thisTwentieth Century of Christs Era. The writer would now make hearty and grateful acknowledg-ment of the kind help and encouragement extended by hisfriends Dr. Henry W. Cattell and Mr. Roberts Le Boutillier,for without their sympathetic aid this volume could not nowhave seen the light. He also expresses sincerest thanks to hisfriend Dr. Joseph Hepburn, who willingly volunteered to re-vise proofs, and by his expert chemical knowledge has furnishednot a few valuable corrections and suggestions from the chem-ical standpoint. In conclusion the writer desires to state that he would gladlywelcome suggestions from every source, whether these may dif-fer from or conform to the views now expressed. For, if strength,length of days, and needed leisure are granted him, he trustsin future volumes to amplify and further extend present con-clusions. Philadelphia, December, CONTENTS vx 0 I. Ether and Energy in the Evolution of Matter 1 II. The Relations and Transformations of Energy during the Evolution of Matter 21 III. The Relation of Inorganic to Organic Bodies 48 IV. The Energies of the Organic World—the Biotic, the Cognitic, the Cogitic—and their Relation to Organisms 68 V. The Biotic State of Energy 97 VI. The Cognitic State of Energy 118 VII. A Review of the Formed Constituents of Organisms 147 VIII. Pentamorphogeny, or the Five Cooperating Causes in Organic Evolution 174 IX. The Law of Proenvironment 205 X. Cell Multiplication, and the Origin of Sexuality in Plants and Animals 243 XI. The Evolution of Plants 300 XII. The Evolution of Plants (Contd) 325 XIII. The Evolution of Plants (Contd) 349 XIV. The Evolution of Animals 374 XV. The Evolution of Animals (Contd) : . 411 XVI. The Evolution of Animals (Contd) 453 XVII. The Evolution of Animals (Contd) 475 XVIII. The Phylogeny of Animals 504 XIX.
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