OBSERVATION OF THE TOTAL SOLAR ECLIPSE OF 

 JANUARY 3, 1908: A BOLOMETRIC STUDY OF THE 

 SOLAR CORONA 



By C. G. abbot 



Director of the Astrophysical Observatory of the Smithsonian 



Institution 



By invitation of Director Campbell, of the Lick Observatory, an 

 expedition in charge of the writer was sent by the Smithsonian Insti- 

 tution to join with the Crocker Eclipse Expedition to Flint Island. 

 In all matters of transportation, subsistence, and companionship the 

 writer and his assistant, Air. A. F. Moore, were cared for by Director 

 Campbell as if members of his own staff; but the expenses of the 

 Smithsonian party were paid in full by the Smithsonian Institution. 



Narrative 



The writer left Washington on November 7, 1907, necessary 

 equipment, comprising 14 boxes of apparatus, having preceded him 

 on the way to San Francisco. A stop was made at Pasadena, Cali- 

 fornia, in order to ascend Mount Wilson and make there certain 

 comparisons of readings between a pyrheliometer which was carried 

 as hand baggage and instruments of the Smithsonian Astrophysical 

 Observatory stored on Mount Wilson. Additional small pieces of 

 apparatus were taken from Mount Wilson and a few supplies were 

 procured in San Francisco. According to previous arrangement, 

 the provisions and camping outfit for the stay on Flint Island were 

 procured by Director Campbell. At San Francisco the Flint Island 

 eclipse party, comprising Director and Mrs. Campbell, Professors Per- 

 rine and Aitkin, and Doctor Albrecht. of the Lick Observatory; Pro- 

 fessor Lewis, of the L'^niversity of California; Mr. Moore (a student 

 at the University of California), and the writer, besides some friends 

 of members of the expedition who were to accompany us as far as 

 Tahiti, embarked on the steamship Mariposa November 22, 1907. 

 We had a calm and pleasant voyage of 12 days to Tahiti, where it 

 was expected that the gunboat Annapolis, under command of Gov- 



