The Physical Basis of SocietyD. Appleton and Company, 1916 - 406 من الصفحات |
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الصفحة 8
... tropics and warming other regions . In these regards the only rival again is ammonia , but no- where in nature is this found in large amounts . Edison states that the greatest discovery of the year 1913 was that of the method of ...
... tropics and warming other regions . In these regards the only rival again is ammonia , but no- where in nature is this found in large amounts . Edison states that the greatest discovery of the year 1913 was that of the method of ...
الصفحة 13
... and storm . The rotation of the earth on its axis in its great course about the sun gives us the phenomena of day and night with its variation from twelve hours each at the tropics to six months each at the poles . It gives EARTH AND MAN ...
... and storm . The rotation of the earth on its axis in its great course about the sun gives us the phenomena of day and night with its variation from twelve hours each at the tropics to six months each at the poles . It gives EARTH AND MAN ...
الصفحة 15
... tropics one finds the characteristic plants with broad leaves and naked buds , of great size and continuous growth — a veritable riot of profusion , with woods so full of undergrowth that travel is difficult . Further north come the ...
... tropics one finds the characteristic plants with broad leaves and naked buds , of great size and continuous growth — a veritable riot of profusion , with woods so full of undergrowth that travel is difficult . Further north come the ...
الصفحة 32
... tropics . By fixing the opportunities nature goes far towards deter- mining the type of the development . 3. Direct Physical Effects .- " We can hardly err in attributing the great lung capacity , massive chests and abnormally large ...
... tropics . By fixing the opportunities nature goes far towards deter- mining the type of the development . 3. Direct Physical Effects .- " We can hardly err in attributing the great lung capacity , massive chests and abnormally large ...
الصفحة 33
... tropics . In part this is a question of control of disease but it has other aspects . There is some reason to believe that the 20 BOAS , F. Changes in Bodily Form , p . 52 . white races cannot permanently endure the constant heat and ...
... tropics . In part this is a question of control of disease but it has other aspects . There is some reason to believe that the 20 BOAS , F. Changes in Bodily Form , p . 52 . white races cannot permanently endure the constant heat and ...
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agriculture America aniline appeared Asia average bacteria basis bees believe birds black bass body breeding carbon carbon dioxid carbonic acid cause cent century changes characters chromosomes civilization climate coal color combined considered crops Darwin death destroyed discovered discoveries disease early earth eggs elements environment Europe European evidence evolution exist fact favorable feeble-minded female fish forms germ cells groups heat hence heredity human Ibid idea Inasmuch inches increase individuals influence inheritance insects iron Kallikak Family known Lamarck land large numbers larvæ later less light Linnæus living lower Luther reigned male man's mated natural selection nature Negro normal organisms ovum oxygen parents physical plants and animals possible produced race realize seeds smallpox social soil species square mile substances temperature thought tion tropics 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.