Word: sky
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Dates: during 1890-1899
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...sent to Peru, and will thus enable some of the most important investigations made here to be extended so as to include the southern stars. The plan of maintaining two stations, one in the northern hemisphere and one in the southern will permit all researches to include the whole sky, and thus give them a completeness unattainable at any single station. A second expedition to Southern California furnishes a mountain station under climatic conditions much superior to those of the eastern portion of the United States, and promises to be a satisfactory solution of the problem contemplated by Mr. Boyden...