| Astronomical Society of the Pacific - 1909 - 614 pages
...method by which we had succeeded during the years 1862 and 1863 in making trustworthy simultaneous comparisons of the bright lines of terrestrial substances with the dark lines in the spectra of some of the fixed stars. We were at the time fully aware that these direct comparisons were not only... | |
| Astronomical Society of the Pacific - 1910 - 316 pages
...method by which we had succeeded during the years 1862 and 1863 in making trustworthy simultaneous comparisons of the bright lines of terrestrial substances with the dark lines in the spectra of some of the fixed stars. We were at the time fully aware that these direct comparisons were not only... | |
| Smithsonian Institution. Board of Regents - 1911 - 846 pages
...method by which we had succeeded during the years 1862 and 1863 in making trustworthy simultaneous comparisons of the bright lines of terrestrial substances with the dark lines In the spectra of some of the fixed stars. We were at the time fully aware that these direct comparisons were not only... | |
| Smithsonian Institution. Board of Regents - 1911 - 848 pages
...method by which we had succeeded during the years 1862 and 1863 in making trustworthy simultaneous comparisons of the bright lines of terrestrial substances with the dark lines in the spectra of some of the fixed stars. We were at the time fully aware that these direct comparisons were not only... | |
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