Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 68American Philosophical Society, 1929 |
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Сторінка 56
... light per second by frequency of the waves per second . Thus the frequency I at the bottom of the chart means one wave per second , and its wave - length is the distance it would travel in one second , before another wave started after ...
... light per second by frequency of the waves per second . Thus the frequency I at the bottom of the chart means one wave per second , and its wave - length is the distance it would travel in one second , before another wave started after ...
Сторінка 279
... light . At once we note that the sim- pler forms of life , for example , the amoeba and other protozoa are largely transparent to light ; light on the whole is freely transmitted by them . However , we note in some protozoa the ...
... light . At once we note that the sim- pler forms of life , for example , the amoeba and other protozoa are largely transparent to light ; light on the whole is freely transmitted by them . However , we note in some protozoa the ...
Сторінка 289
... light of 10 candle - power , he cannot become conscious of an increase in the intensity of the light until 2 candle - power is added ; if he looks at a 60 candle - power flame , 12 candle - power must be added ; if it is a 2000 candle ...
... light of 10 candle - power , he cannot become conscious of an increase in the intensity of the light until 2 candle - power is added ; if he looks at a 60 candle - power flame , 12 candle - power must be added ; if it is a 2000 candle ...
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Mans Future in the Light of His Past and Present By ALEŠ | 1 |
The Vegetation of the Screes or Talus Slopes of Western North | 13 |
Saxifraga Tolmiei Torr Gray a screecoverer | 20 |
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American amoeba Anax junius animals apple Arthropods atom Babur Bābur's Beisan body botanical Bradbury Bradbury's Campos do Jordão cell division cell number changes chemical civilization compounds consolidation container Corixids curves death discussion disease ductless ductless glands Egypt electron ether waves evidence exuvia fact frequency given glands gravitation growth by increase growth factor growth in length gudermannian Hamitic human hyperbolic angle hyps influence insects instar interest Interstate Commerce Commission Jefferson larva larvæ Liverpool living matter Mayfly Mayfly larvæ mean sealevel metazoa mitosis moults Nannothemis bella nature neurones observed Odonata organism Oxyaena Oxyaenidae Palaeonictis paper period philosophers photograph plants potential prehistory present protoplasm radians railroad rate of growth Read April relation result root Rousseau scree Semitic silicate skeleton species stage structure sulfhydryl Sumerians temperature tion tissue tumors vegetation