The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895C. Scribner's son, 1896 - 312 pagine |
Dall'interno del libro
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Pagina v
... HEAD 55 Worms and the development of organs . - Mollusks : The external protec- tive skeleton leads to degeneration or stagnation . - Annelids and arthro- pods : The external locomotive skeleton leads to temporary rapid advance , but ...
... HEAD 55 Worms and the development of organs . - Mollusks : The external protec- tive skeleton leads to degeneration or stagnation . - Annelids and arthro- pods : The external locomotive skeleton leads to temporary rapid advance , but ...
Pagina 17
... head of which man stands , there always has been progress , we cannot doubt that future progress will be as certain , and per- haps far more rapid . In all the struggle of life we shall have the sure hope of success and victory ; if not ...
... head of which man stands , there always has been progress , we cannot doubt that future progress will be as certain , and per- haps far more rapid . In all the struggle of life we shall have the sure hope of success and victory ; if not ...
Pagina 46
... head , has one end which goes first and can be called the front end . The upper or dorsal surface is usually more colored with pigment cells than the lower or ventral surface , on which is the mouth . It has also a right and left side ...
... head , has one end which goes first and can be called the front end . The upper or dorsal surface is usually more colored with pigment cells than the lower or ventral surface , on which is the mouth . It has also a right and left side ...
Pagina 53
... Head , in any proper sense of the term , and skeleton are still lacking ; they remain to be developed . And yet , taking the most hopeful view possible con- cerning the animal kingdom , its prospects of attain- ing anything very lofty ...
... Head , in any proper sense of the term , and skeleton are still lacking ; they remain to be developed . And yet , taking the most hopeful view possible con- cerning the animal kingdom , its prospects of attain- ing anything very lofty ...
Pagina 54
... is the promise of an infinite future . The atom of nervous power shall increase until it subdues and dom- inates the whole mass . CHAPTER III WORMS TO VERTEBRATES : SKELETON AND HEAD . 54 THE WHENCE AND THE WHITHER OF MAN.
... is the promise of an infinite future . The atom of nervous power shall increase until it subdues and dom- inates the whole mass . CHAPTER III WORMS TO VERTEBRATES : SKELETON AND HEAD . 54 THE WHENCE AND THE WHITHER OF MAN.
Altre edizioni - Visualizza tutto
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
Parole e frasi comuni
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity higher animals higher forms highest human hydra important increase individual insect instinct intelligence jaws knowledge laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral motives muscles muscular muscular system natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception possible primitive probably progress protoplasm protozoa purely reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young