| 1900 - 474 pages
...lacking in stability. When I made the first attempt in 1887, with the assistance of Professor Scheiner, to record photographically the displacements of the...error, which in the Greenwich observations averaged ±22 km for an evening, being brought down in the Potsdam observations to an average of ± 2.6 km.... | |
| Gustav Eberhard, Arnold Kohlschütter, Hans Ludendorff - 1928 - 498 pages
...enormous improvement. In 1887 VOGEL at Potsdam, with the assistance of SCHEINER, made the first attempt to record photographically the displacements of the lines in stellar spectra, and to measure them as accurately as possible on the spectrograms. The attempt was successful, and since... | |
| J. B. Hearnshaw - 1990 - 554 pages
...Vogel himself (32): When I made the first attempt in 1887, with the assistance of Professor Scheiner, to record photographically the displacements of the...constructed in 1888; the probable error, which in the Sjirrtrum rtrs Sirius. Spectrum dr.s Prorron. Spectrum Am Kiqrl. .Spectrum Aea Aret\ir H . ('. Vixjfl,... | |
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