The Physical Basis of SocietyD. Appleton and Company, 1916 - 406 من الصفحات |
من داخل الكتاب
النتائج 1-5 من 94
الصفحة 9
... less , or occasionally more , than six carbon atoms are formed naturally by life processes , by far the greater portion of the substance of living organisms is built up of six carbon groups and multiples of these . " 1 ... Carbonic acid ...
... less , or occasionally more , than six carbon atoms are formed naturally by life processes , by far the greater portion of the substance of living organisms is built up of six carbon groups and multiples of these . " 1 ... Carbonic acid ...
الصفحة 12
... less happy . In countries of good rainfall the soluble salts of calcium , magnesium , sodium and potassium are leached out of the soil and carried off . In arid regions they are often brought to the surface and deposited as alkali which ...
... less happy . In countries of good rainfall the soluble salts of calcium , magnesium , sodium and potassium are leached out of the soil and carried off . In arid regions they are often brought to the surface and deposited as alkali which ...
الصفحة 15
... but we do not change their nature . With the advent of cold weather we must take them indoors or let them perish . This succession of the seasons produces less effect upon the temperature of the ocean than on land as may EARTH AND MAN 15.
... but we do not change their nature . With the advent of cold weather we must take them indoors or let them perish . This succession of the seasons produces less effect upon the temperature of the ocean than on land as may EARTH AND MAN 15.
الصفحة 16
... less from day to day and its extremes are less . The tem- perature in large bodies of water varies to some extent with the depth . The temperature in Lake Michigan at the surface in summer is put at 64.9 ° ; at a depth of 18 feet , 64.9 ...
... less from day to day and its extremes are less . The tem- perature in large bodies of water varies to some extent with the depth . The temperature in Lake Michigan at the surface in summer is put at 64.9 ° ; at a depth of 18 feet , 64.9 ...
الصفحة 17
... less thoroughly understood , though great progress has been made in mapping them since the middle of the nineteenth century . The United States is in the zone of prevailing west winds , which in large measure accounts for the cold ...
... less thoroughly understood , though great progress has been made in mapping them since the middle of the nineteenth century . The United States is in the zone of prevailing west winds , which in large measure accounts for the cold ...
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
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.