New York, New York, Columbia University Observatory. Northfield, Minnesota, Goodsell Observatory. Oxford, England, Radcliffe Observatory. Oxford, England, University Observatory. Paris, France, Observatoire National. Paris, France, Rue Cassini 16, Société Astronomique de France. Philadelphia, Pa., 105 South Fifth St., American Philosophical Society. Potsdam, Germany, Astrophysikalisches Observatorium. Prague, Austro-Hungary, Universitäts-Sternwarte. Pulkowa, Russia, Imperial Observatory. Rio de Janeiro, Brazil, Observatory. Rome, Italy, Observatory of the Roman College. Rome, Italy, Specula Vaticana. San Francisco, California, California Academy of Sciences. San Francisco, California, Technical Society of the Pacific Coast. Strassburg, Germany, Universitäts-Sternwarte. Sydney, New South Wales, Observatory. Tacubaya, Mexico, Observatorio Astronomico Nacional. Tokio, Japan, University Observatory. Toronto, Canada, Astronomical and Physical Society of Toronto. Toulouse, France, Observatoire. Turin, Italy, Observatory. University Park, Colorado, Chamberlin Observatory. University of Virginia, Virginia, McCormick Observatory. Upsala, Sweden, University Observatory. Vienna, Austria, Imperial Observatory. Vienna (Ottakring), Austria, Von Kuffnersche Sternwarte. Washington, District of Columbia, Library of Congress. Washington, District of Columbia, National Academy of Sciences. Washington, District of Columbia, Naval Observatory. Washington, District of Columbia, Smithsonian Institution. Washington, District of Columbia, The American Ephemeris. Washington, District of Columbia, U. S. Coast and Geodetic Survey. Williams Bay, Wisconsin, Yerkes Observatory. Zurich, Switzerland, Observatory. EXCHANGES. Astrophysical Journal, Williams Bay, Wisconsin. Prof. Dr. H. J. Klein, Editor of Sirius, Theresien St. 85, Köln Lindenthal, Germany. The Observatory, Greenwich, England. FOR REVIEW. [See Publications, A. S. P., Vol. VIII, p. 101.] The Call, San Francisco, California. The Record-Union, Sacramento, California. THE LICK OBSERVATORY-CROCKER ECLIPSE EXPEDITION TO SPAIN. BY W. W. CAMPBELL AND C. D. Perrine. The total solar eclipse of August 30, 1905, was looked forward to with unusual interest. Its duration,-three and three-fourths minutes as a maximum,-its occurrence at the season of the year when weather conditions would be the most promising, and the ease of access to widely separated observing stations on three continents, formed a favorable combination of rare occurrence. The eclipse would occur in Spain an hour and a half later than in Labrador; and in Egypt an hour later than in Spain. Here were offered just the opportunities desired to determine the existence and perhaps the character of motions within the coronal structure, and to search for possible intramercurial planets. To take suitable advantage of these rare opportunities required that well-equipped expeditions, working in harmony and cooperation, should be sent to each of the three countries mentioned. The subject was brought to the attention of Mr. WILLIAM H. CROCKER in July, 1904, who was quick to recognize the scientific importance of the event; and he at once made provision for meeting the expenses of the three large expeditions, as planned.1 Preparation of the apparatus commenced at once and continued uninterruptedly until June, 1905. With the approval of the Board of Regents of the University, the Labrador expedition2 was dispatched in charge of Acting Astronomer HEBER D. CURTIS; the Spanish expedition in charge of Director CAMPBELL, with Astronomer C. D. PERRINE as associate; and the Egyptian expedition in charge of Astronomer W. J. HUSSEY.3 The path of totality, about one hundred and twenty miles. wide, crossed northern Spain in a northwest-southeast direction. The cities of Oviedo, Burgos, Soria, and Daroca are 1 Mr. CROCKER'S generosity in sending eclipse expeditions from the Lick Observatory, University of California, to Georgia in 1900, to Sumatra in 1901, and to Labrador, Spain, and Egypt in 1905, is recognized wherever astronomical literature travels. 2 Dr. CURTIS's account of this expedition was published in these Publications, No. 105. 3 Astronomer HUSSEY'S report follows in the present number of these Publications. |