British Almanac and Companion, 60. kötetStationers' Company, 1887 |
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1 - 3 találat összesen 59 találatból.
40. oldal
... obtained . Until some four years ago , the only really useful celestial photographs that had been obtained were those of the sun and moon , and so long as only collodion plates were available , there seemed no prospect of making any ...
... obtained . Until some four years ago , the only really useful celestial photographs that had been obtained were those of the sun and moon , and so long as only collodion plates were available , there seemed no prospect of making any ...
47. oldal
... obtained in his stellar photographs are of very high importance , since it led to the discovery of a series of lines in the ultra - violet portion of the spectra of the blue stars , due to the presence of hydrogen . The comet which was ...
... obtained in his stellar photographs are of very high importance , since it led to the discovery of a series of lines in the ultra - violet portion of the spectra of the blue stars , due to the presence of hydrogen . The comet which was ...
177. oldal
... obtained . Professor Bakhuysen , of Leyden , indeed claims to have obtained a mean result of the various estimates hereto- fore deduced , which he advances as an improvement on all of them . But he has only done this by modifying the ...
... obtained . Professor Bakhuysen , of Leyden , indeed claims to have obtained a mean result of the various estimates hereto- fore deduced , which he advances as an improvement on all of them . But he has only done this by modifying the ...
Tartalomjegyzék
Abstracts of Important Acts of Parliament passed in 1886 | 1 |
PART I | 5 |
StarGroups and StarMagnitudes By W T LYNN B A | 12 |
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