The Physical Basis of SocietyD. Appleton and Company, 1916 - 406 من الصفحات |
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الصفحة 35
... blood gets more oxygen and gives off more carbon dioxid . 4. Physiological Effects . In spite of the considerable overlapping with the purely physical effects it seems wise to consider certain types of influences under this caption ...
... blood gets more oxygen and gives off more carbon dioxid . 4. Physiological Effects . In spite of the considerable overlapping with the purely physical effects it seems wise to consider certain types of influences under this caption ...
الصفحة 36
... blood . Dry air and decreased pressure , on the other hand , have these effects : - nervous excitement ; sleeplessness ; quickened pulse ; a dim skin and a decreased temperature . " 24 Dry cold and dry heat are relatively easy to endure ...
... blood . Dry air and decreased pressure , on the other hand , have these effects : - nervous excitement ; sleeplessness ; quickened pulse ; a dim skin and a decreased temperature . " 24 Dry cold and dry heat are relatively easy to endure ...
الصفحة 46
... , they have a strong pedal sucker which enables them to remain fixed . The blood temperature of hibernating rodents 35 SHELFORD , V. E. o . c . , p . 29 . falls to about 40 ° , sometimes nearly to 35 46 THE PHYSICAL BASIS OF SOCIETY.
... , they have a strong pedal sucker which enables them to remain fixed . The blood temperature of hibernating rodents 35 SHELFORD , V. E. o . c . , p . 29 . falls to about 40 ° , sometimes nearly to 35 46 THE PHYSICAL BASIS OF SOCIETY.
الصفحة 47
... believe that the barring of the feathers of some birds is due to the low blood pressure and poor circulation at night . An interesting rhythm is shown by the phosphorescent organisms of the sea . " It might be supposed EARTH AND MAN 47.
... believe that the barring of the feathers of some birds is due to the low blood pressure and poor circulation at night . An interesting rhythm is shown by the phosphorescent organisms of the sea . " It might be supposed EARTH AND MAN 47.
الصفحة 128
... blood of cattle afflicted with anthrax , but it was not till 1863 that Davaine proved that these were the cause of the disease . In 1880 Eberth identified the bacillus producing typhoid . In 1881 Koch found the bacillus of tuberculosis ...
... blood of cattle afflicted with anthrax , but it was not till 1863 that Davaine proved that these were the cause of the disease . In 1880 Eberth identified the bacillus producing typhoid . In 1881 Koch found the bacillus of tuberculosis ...
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Africa America appeared Australoid average bacteria basis become believe biological birds birth-rate black bass blood body born brain breeding carbon carbon dioxid cause cent century cephalic index changes characters child chromosomes civilization color considered crossing Darwin death death-rate discovered discoveries disease earth eggs environment Europe European evidence evolution exist eyes fact feeble-minded female forms germ cells given groups hair head HEMOPHILIA hence heredity human Huntington's chorea Ibid Inasmuch inches increase individuals inheritance insane insects Kallikak Family known large numbers less living long-headed male man's mated Mendelian ment mental Mongols natural selection nature Negrito Negro normal organisms ovum parents physical plants and animals possible produced race relatively seems skin social society soil species spermatozoon square mile temperature thought tion traits woman women yellow yellow fever
مقاطع مشهورة
الصفحة 155 - Some drill and bore The solid earth, and from the strata there Extract a register, by which we learn, That he who made it, and revealed its date To Moses, was mistaken in its age.
الصفحة 139 - I happened to read for amusement ' Malthus on Population,' and being well prepared to appreciate the struggle for existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances favourable variations would tend to be preserved, and unfavourable ones to be destroyed. The result of this would be the formation of new species. Here then I had at last got a theory by which to work...
الصفحة 58 - Near villages and small towns I have found the nests of humble-bees more numerous than elsewhere, which I attribute to the number of cats that destroy the mice.
الصفحة 139 - In October 1838, that is, fifteen months after I had begun my systematic enquiry, I happened to read for amusement Malthus on Population, and being well prepared to appreciate the struggle for existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances favourable variations would...
الصفحة 54 - It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organized creatures.
الصفحة 186 - The two parents between them contribute on the average onehalf of each inherited faculty, each of them contributing onequarter of it. The four grandparents contribute between them one-quarter, or each of them one-sixteenth ; and so on, the sum of the series i + J + i + TV + , being equal to 1, as it should be.
الصفحة 126 - This fool wishes to reverse the entire science of astronomy; but sacred Scripture tells us that Joshua commanded the sun to stand still, and not the earth.
الصفحة 58 - I am tempted to give one more instance showing how plants and animals, remote in the scale of nature, are bound together by a web of complex relations.
الصفحة 159 - I can conceive in biology would be the discovery of the instability which leads to the continual division of the cell. When I look at a dividing cell I feel as an astronomer might do if he beheld the formation of a double star: that an original act of creation is taking place before me.
الصفحة 58 - I have also found that the visits of bees are necessary for the fertilization of some kinds of clover; for instance, 20 heads of Dutch clover (Trifolium repens) yielded 2,290 seeds, but 20 other heads protected from bees produced not one.