Nature, Količina 60Sir Norman Lockyer Macmillan Journals Limited, 1899 |
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Zadetki 1–3 od 82
Stran 102
... species consists of 100,000 individuals of each sex , with only the usual amount of fluctuating external variability ... species is the same as the number of females . Each of these numbers we shall denote by unity . For con- venience ...
... species consists of 100,000 individuals of each sex , with only the usual amount of fluctuating external variability ... species is the same as the number of females . Each of these numbers we shall denote by unity . For con- venience ...
Stran 306
... SPECIES . Significance of the Conception . - As the word hybrid ordin arily means the result of a cross between two species , it follows almost necessarily that the question of what a species is was several times raised . Prof. Henslow ...
... SPECIES . Significance of the Conception . - As the word hybrid ordin arily means the result of a cross between two species , it follows almost necessarily that the question of what a species is was several times raised . Prof. Henslow ...
Stran 537
... species and sub - species , in ad- dition to one Old World form recently described from Szechuan . The discovery of the Szechuan species adds one more link in the chain connecting the fauna of North - eastern Asia and North America ...
... species and sub - species , in ad- dition to one Old World form recently described from Szechuan . The discovery of the Szechuan species adds one more link in the chain connecting the fauna of North - eastern Asia and North America ...
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acid action American amperes animals appears atomic weight birds British carbon character chemical chemistry coccidia College colour comet contains curve described electric Engineers Ephemeris examination exhibited experiments fact Geological give given Haemamoeba heat hissing hybrids hydrogen hydrogen peroxide illustrated important infected Institute interesting investigations iron Islands J. J. Thomson June laboratory large number larvæ lectures light lines London Lord Lord Kelvin magnetic magnetic field malaria mathematical matter means ment metals meteorological method mosquitoes Museum nature observations Observatory obtained organic original paper photographs physical plates position practical present President produced Prof Professor published recent reference regard remarkable Royal Society scientific South species specimens stars surface telegony temperature theory tion tuberculosis University University of London various volume W. H. Perkin