Word: darkened
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Dates: during 1900-1909
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...whether or not there is an intermercurial planet. A photographic instrument has been made with nine plates arranged in three rows, attached so that a curved field can be obtained. The light of the sky around the sun at the time to the total eclipse will be sufficient to darken these plates appreciably, but not so much but that stars of the eighth magnitude will appear. The existence of a small intermercurial planet is possible and it will probably appear on the plates if it exists. If other astronomers can be induced to make similar observation sin Spain or Algiers...