The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
من داخل الكتاب
النتائج 1-5 من 38
الصفحة 1
... element but bearing such relation to hydrogen that it is supposed to be a precursor thereof ; hence these are called Protohydrogen stars . Helium is also present with hints of magnesium and calcium . In the helium - gas stars ( Taurus ...
... element but bearing such relation to hydrogen that it is supposed to be a precursor thereof ; hence these are called Protohydrogen stars . Helium is also present with hints of magnesium and calcium . In the helium - gas stars ( Taurus ...
الصفحة 2
... elements . This same gradation can be produced under high pres- sure by electricity , and thus a glimpse can be had in the laboratory of the process of world - making . Watery vapors appear and on the planets bodies of snow and water ...
... elements . This same gradation can be produced under high pres- sure by electricity , and thus a glimpse can be had in the laboratory of the process of world - making . Watery vapors appear and on the planets bodies of snow and water ...
الصفحة 3
... elements which , so far as we can tell , are distinct . Nearly 99 per cent of the earth's surface including water ( as the fol- lowing table shows ) is made up of eight of these , no other element contributing one per cent . Even such ...
... elements which , so far as we can tell , are distinct . Nearly 99 per cent of the earth's surface including water ( as the fol- lowing table shows ) is made up of eight of these , no other element contributing one per cent . Even such ...
الصفحة 4
... elements have not been found in nature save as compounds and man has reduced them in his laboratory . Aluminum , first produced in 1827 , has become commercially important ; while the metal calcium remains merely a curiosity . In like ...
... elements have not been found in nature save as compounds and man has reduced them in his laboratory . Aluminum , first produced in 1827 , has become commercially important ; while the metal calcium remains merely a curiosity . In like ...
الصفحة 5
... elements or com- pounds which enter largely into the structure of living organisms are not merely those whose properties enable them to maintain life but are the only ones possessing these properties . He emphasizes , therefore , the ...
... elements or com- pounds which enter largely into the structure of living organisms are not merely those whose properties enable them to maintain life but are the only ones possessing these properties . He emphasizes , therefore , the ...
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acre Africa America appeared Asia average bacteria beetles believe birds body breeding carbon carbon dioxid carnivora cattle cause cent century changes characters chromosomes civilization climate color considered crops cultivated Darwin death destroyed discovered discoveries disease early earth eggs elements elm-leaf beetle environment Europe European evidence evolution existence fact favorable feeble-minded female fish forms germ cells groups growth hence heredity Hessian fly human Ibid important Inasmuch inches increase individuals influence inheritance insects Kallikak Family killed known Lamarck large numbers larvæ less living lower malaria male man's mated natural selection nature normal organisms ovum oxygen parents physical plants and animals population possible produced race reason seeds smallpox social society soil species square mile substances survive temperature theory thought tion trees tropics tuberculosis United women yellow yellow fever