Observatory, Cordoba, Argentine Republic. Observatory, Florence, Italy. Observatory, Greenwich, England. Observatory, Harvard College, Massachusetts. Observatory, Melbourne, Australia. Observatory, Milan, Italy. Observatory, Morrison, Glasgow, Mo. Observatory, Prague, Austria. Observatory, Radcliffe, Oxford, England. Observatory, St. Petersburg, Russia. Observatory, Tacubaya, Mexico. Observatory, Tempel, Rugby, England. Observatory, Washburn, Madison, Wis. Observatory, Washington, D. C. Observatory, Yale University, Connecticut. American Academy, Boston, Mass. American Phil. Society, Philadelphia, Pa. Astronomical Society, Leipzig, Germany.
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Elisha Mitchell Sci. Soci. Chapel Hill, N. C. Imp. Acad. of Sciences, St. Petersburg, Russia. Italian Spectroscopic Society, Rome, Italy. British Transit of Venus Committee. Bureau of Education, Washington, D. C. Chief Signal Officer of Army, Washington, D. C. Nautical Almanac Office, Washington, D. C. Smithsonian Institution, Washington, D. C. U. S. Coast & Geodetic Survey, Washington, D. C. Dr. W. Döllen, Pulkowa, Russia. B. d'Engelhardt, Dresden, Germany. Dr. A. Marth, London, England. Dr. C. H. F. Peters, Clinton, N. Y. Prof. E. C. Pickering, Cambridge, N. Y. Dr. Hermann Struve, Pulkowa, Russia. Dr. Otto Struve, Pulkowa, Russia. Prof. C. S. Venable, University of Virginia.
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