The Sun
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In our eReader you can find the full English version of the book. Read The Sun Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Sun
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67. There is needed much more research in this difficult field. It would be greatly promoted by the introduction of means for obtaining nearly monochromatic light of well deter- mined and adequate intensity, covering considerable areas suitable for plant growth under otherwise nat- ural conditions.
24 THE SUN Kniep and Minder 1 have recently made observa- tions by the bubble method with Elodea Canadensis on the assimilation of carbon dioxide in lights of dif- ferent colors. They used sunlight f...iltered by colored solutions so as to select red light (wave length 0. 62/z, to some point in the infra-red not determined), green light (wave length 0. 512^ to 0. 524/*), or blue light (wave length 0. 35yu, to 0. 50//, ) at pleasure. In each case the light could be reduced to a fixed intensity as meas- ured by a Rubens thermopile, so that they could in- vestigate the rates of assimilation under equal inten- sities of total radiation for each of the three colors. They found the green light of no effect in producing assimilation.
What to read after The Sun?
You can find similar books in the "Read Also" column, or choose other free books by C G Charles Greeley Abbot to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
67. There is needed much more research in this difficult field. It would be greatly promoted by the introduction of means for obtaining nearly monochromatic light of well deter- mined and adequate intensity, covering considerable areas suitable for plant growth under otherwise nat- ural conditions.
24 THE SUN Kniep and Minder 1 have recently made observa- tions by the bubble method with Elodea Canadensis on the assimilation of carbon dioxide in lights of dif- ferent colors. They used sunlight f...iltered by colored solutions so as to select red light (wave length 0. 62/z, to some point in the infra-red not determined), green light (wave length 0. 512^ to 0. 524/*), or blue light (wave length 0. 35yu, to 0. 50//, ) at pleasure. In each case the light could be reduced to a fixed intensity as meas- ured by a Rubens thermopile, so that they could in- vestigate the rates of assimilation under equal inten- sities of total radiation for each of the three colors. They found the green light of no effect in producing assimilation.
What to read after The Sun?
You can find similar books in the "Read Also" column, or choose other free books by C G Charles Greeley Abbot to read onlineMoreLess
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