INVESTIGATING the absorption of the vertical component of cosmic radiation in lead by means of a Geiger–Müller counter-telescope, George and Appapillai 1 found in 1945 at sea-level (London and Colombo ...
The relative amounts of apparent photosynthesis in two portions of the spectrum, one usually in the yellow, were determined for white pine trees grown in red or in blue-violet light. There were rather ...
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