The Principles of Heredity with Some ApplicationsChapman and Hall, 1905 - 359 من الصفحات |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
able acquired immunity adaptation adult alcohol ancestors ancestral type Animals and Plants antitoxin appears arise artificial selection become bi-parental reproduction body brain capable cause cells child civilization colour common comparatively complex Darwin descendants disease drunken effect elimination endemic environment Europeans evidence evolution evolved example existence experience fact faculty germ germ-cells germ-plasm hereditary heredity higher animals human hypothesis inborn characters increased individual infected influence inheritance instance instinct intelligence knowledge Lamarckian doctrine less life-history lower animals malaria measles mental acquirements microbes mind natives Natural Selection occur offspring organisms ovum parasites parent perish phagocytes phthisis physical present probably produced progressive variations race reason recapitulation reflex action regards regression religion rendered resistant result reversion saprophytic sensations sexual sexual reproduction species specious present stimulus structures supposed syphilis tend tendency theory tion toxins traits transmission of acquirements true tuberculosis undergo unicellular useless varieties zymotic disease
مقاطع مشهورة
الصفحة 222 - To-day I saw the dragon-fly Come from the wells where he did lie. "An inner impulse rent the veil Of his old husk : from head to tail Came out clear plates of sapphire mail. "He dried his wings: like gauze they grew: Thro' crofts and pastures wet with dew A living flash of light he flew.
الصفحة 288 - Whatever the moral and intellectual progress of men may be, it resolves itself not into a progress of natural capacity, but into a progress, if I may so say, of opportunity; that is, an improvement in the circumstances under which that capacity after birth comes into play. Here, then, lies the gist of the whole matter. The progress is one, not of internal power, but of external advantage.
الصفحة 230 - James sees now the primordial « fact of our immediate experience » to be that of « the specious present », « the practically cognized present is no knife-edge », but a saddle-back, with a certain breadth of its own on which we sit perched, and from which we look in two directions into time.
الصفحة 260 - To the lion it is the lioness which is made to be loved ; to the bear, the she-bear. To the broody hen the notion would probably seem monstrous that there should be a creature in the world to whom a nestful of eggs was not the utterly fascinating and precious and never-to-betoo-much-sat-upon object which it is to her.* Thus we may be sure that, however mysterious some animals' instincts may appear to us, our instincts will appear no less mysterious to them.
الصفحة 283 - The consequence was that these gentle natures had no continuance, and thus, by a policy so singularly unwise and suicidal that I am hardly able to speak of it without impatience, the Church brutalized the breed of our forefathers. She acted precisely as if she had aimed at selecting the rudest portion of the community to be, alone, the parents of future generations. She practised the arts which breeders would use, who aimed at creating ferocious, currish, and stupid natures.
الصفحة 288 - ... of all vulgar modes of escaping from the consideration of the effect of social and moral influences on the human mind, the most vulgar is that of attributing the diversities of conduct and character to inherent natural differences.
الصفحة 52 - Under a scientific point of view, and as leading to further investigation, but little advantage is gained by believing that new forms are suddenly developed in an inexplicable manner from old and widely different forms, over the old belief in the creation of species from the dust of the earth.
الصفحة 261 - He acts in each case separately, and simply because he cannot help it; being so framed that when that particular running thing called a mouse appears in his field of vision he must pursue...
الصفحة 262 - ... appears in his field of vision he must pursue; that when that particular barking and obstreperous thing called a dog appears there he must retire, if at a distance, and scratch if close by; that he must withdraw his feet from water and his face from flame, etc. His nervous system is to a great extent a preorganized bundle of such reactions — they are as fatal as sneezing, and as exactly correlated to their special excitants as it is to its own.
الصفحة 261 - The actions we call instinctive all conform to the general reflex type; they are called forth by determinate sensory stimuli in contact with the animal's body, or at a distance in his environment.