Animal Life and IntelligenceGinn, 1891 - 512 páginas |
Dentro del libro
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Página v
... direct bearing on questions of Instinct , rendered such treatment of my subject , not only advisable , but necessary . Moreover , it seemed to me , and to those whom I consulted in the matter , that a general work on Animal Life and ...
... direct bearing on questions of Instinct , rendered such treatment of my subject , not only advisable , but necessary . Moreover , it seemed to me , and to those whom I consulted in the matter , that a general work on Animal Life and ...
Página 22
... direct communication between the right and left receivers or the right and left force - pumps . Let us now follow the purified stream , with its oxygen- laden blood - discs , as it leaves the capillary tubes of the lungs . It generally ...
... direct communication between the right and left receivers or the right and left force - pumps . Let us now follow the purified stream , with its oxygen- laden blood - discs , as it leaves the capillary tubes of the lungs . It generally ...
Página 27
... direct or indirect contact with all the myriads of living cells in the body . In the first place , the material thus supplied is utilized for and ministers to the growth of the organs and tissues . This growth is effected by the ...
... direct or indirect contact with all the myriads of living cells in the body . In the first place , the material thus supplied is utilized for and ministers to the growth of the organs and tissues . This growth is effected by the ...
Página 30
... direct . Now , instead of likening the organism as a whole to a steam - engine , it is more satisfactory to liken each cell to a gas - engine . We have seen that the cell - substance around the nucleus is composed of a network of proto ...
... direct . Now , instead of likening the organism as a whole to a steam - engine , it is more satisfactory to liken each cell to a gas - engine . We have seen that the cell - substance around the nucleus is composed of a network of proto ...
Página 32
... direct . Now , instead of likening the organism as a a steam - engine , it is more satisfactory to to a gas - engine . We have seen the around the nucleus is compose frequently the products of explosive activity are made use of 30 ...
... direct . Now , instead of likening the organism as a a steam - engine , it is more satisfactory to to a gas - engine . We have seen the around the nucleus is compose frequently the products of explosive activity are made use of 30 ...
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Términos y frases comunes
action æsthetic Animal Intelligence animals antennæ associated auditory beauty bees believe birds body characters colour complex conceptual cones consciousness constructs Darwin developed differentiation direct disuse divergence effects eggs elimination emotions experience fact factor faculty favourable feelings female fertilized gemmules germ germ-plasm germinal cells give rise habits heredity human hydra hypothesis individual inference influence inherited insects instinctive activities intelligence intercrossing isolation kinesis kinetic larvæ male mating matter Max Müller Mental Evolution metakinetic metazoa millimetre mind mode modified natural selection nerves neurosis normal object observations offspring organism origin ovum pain pangenesis parent perception phenomena physiological pleasure probably produced Professor Weismann protoplasmic protozoa question regard reproduction resemblance result retina Romanes seems seen semicircular canals sensations sense sexual sexual selection similar Sir John Lubbock smell species sperm stimulation suggested suppose taste tendency term tion tissues variations vibrations words
Pasajes populares
Página 166 - The impression that all this evidence leaves on the mind is one of some wonder whether nurture can do anything at all, beyond giving instruction and professional training.
Página 90 - The flowers of two distinct individuals of the same species would thus get crossed; and the act of crossing, as can be fully proved, gives rise to vigorous seedlings, which consequently would have the best chance of flourishing and surviving.
Página 387 - But pain or suffering of any kind, if long continued, causes depression and lessens the power of action, yet is well adapted to make a creature guard itself against any great or sudden evil. Pleasurable sensations, on the other hand, may be long continued without any depressing effect ; on the contrary, they stimulate the whole system to increased action.
Página 386 - ... beings have been developed through natural selection, or the survival of the fittest, together with use or habit, will admit that these organs have been formed so that their possessors may compete successfully with other beings, and thus increase in number. Now an animal may be led to pursue that course of action which is most beneficial to the species by suffering, such as pain, hunger, thirst, and fear ; or by pleasure, as in eating and drinking, and in the propagation of the species, &c. ;...
Página 74 - Can it, then, be thought improbable, seeing that variations useful to man have undoubtedly occurred, that other variations useful in some way to each being in the great and complex battle of life, should sometimes occur in the course of thousands of generations...
Página 387 - We see this in the pleasure from exertion, even occasionally from great exertion of the body or mind, — in the pleasure of our daily meals, and especially in the pleasure derived from sociability, and from loving our families. The sum of such pleasures as these, which are habitual or frequently recurrent, give, as I can hardly doubt, to most sentient beings an excess of happiness over misery, although many occasionally suffer much.
Página 381 - Under this powerful emotion the action of the heart is much accelerated, or it may be much disturbed. The face reddens, or it becomes purple from the impeded return of the blood, or may turn deadly pale. The respiration is laboured, the chest heaves, and the dilated nostrils quiver. The whole body often trembles. The voice is affected. The teeth are clenched or ground together, and the muscular system is commonly stimulated to violent, almost frantic action. But the gestures of a man in this state...
Página 147 - It is quite conceivable that every species tends to produce varieties of a limited number and kind, and that the effect of natural selection is to favour the development of some of these, while it opposes the development of others along their predetermined lines of modification.
Página 399 - Dogs show what may be fairly called a sense of humour, as distinct from mere play ; if a bit of stick or other such object be thrown to one, he will often carry it away for a short distance ; and then squatting down with it on the ground close before him, will wait until his master comes quite close to take it away. The dog will then seize it and rush away in triumph, repeating the same manoeuvre, and evidently enjoying the practical joke.
Página 202 - While man has only tilled a few level plains, a few great river valleys, a few peninsular mountain slopes, leaving the vast mass of earth untouched by his hand, the insect has spread himself over every land in a thousand shapes, and has made the whole flowering creation subservient to his daily wants. His buttercup, his dandelion, and his meadow-sweet grow thick in every English field. His thyme clothes the hillside; his heather purples the bleak gray moorland.