Abstract
The Einstein Tower.—The Observatory for December contains an illustrated article on this tower, which has just been erected in the grounds of the Potsdam Astrophysical Observatory. It contains a vertical telescope of 50 cm. aperture and 14½ metres aperture, fed by a cœlostat. There are two spectro-graphs, one with a plane-grating of 12½ cm. aperture, the other with two large prisms giving a dispersion of two angstroms to 1 mm. The instrument will be chiefly employed to investigate the presence or absence of the Einstein shift, but it is available for general astrophysical work. It is in charge of Dr. E. Freundlich, under the general control of Prof. Einstein, who has now an appointment at Potsdam. Dr. Freundlich hopes to observe next year's eclipse from Christmas Island, with A. Kohlschütter and Dr. Voûte.
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Our Astronomical Column. Nature 109, 24 (1922). https://doi.org/10.1038/109024a0
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DOI: https://doi.org/10.1038/109024a0