Abstract
THE first report of the present Director of the Mt. Stromlo Observatory refers to the period May 1939–April 1940, though it also sketches the history of the Observatory since its establishment in 1910, and gives a brief account of the main observational programmes carried out since the first Director's appointment in 1924. The observations of solar radiation begun in 1926 have been completed, and a discussion of the results is promised. One of the most interesting conclusions is that the correlation between total solar radiation and duration of bright sunshine is so close as to be useful for derivation of the first quantity, the direct observation of which is difficult, from the second, which is a standard meteorological datum. Spectrohelioscopic and visual observations of the sun have been directed respectively to the detection and mapping of bright solar eruptions, several spectrograms of which have been obtained during 1939. As compared with flash spectra, these show a puzzling enhancement of low-excitation Fe I and Fe II lines.
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The Commonwealth Solar Observatory, Canberra. Nature 147, 55 (1941). https://doi.org/10.1038/147055a0
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DOI: https://doi.org/10.1038/147055a0