ANNALS OF THE ACADEMY 85 
Professors C. R. Van Hise and E. H. Moore; and at the instal- 
lation of Dr. Joseph Swain as president of Swarthmore College, 
on November 15, 1902, the Academy’s delegate was Professor 
Edgar F. Smith. The centenary celebration of the birth of the 
Norwegian mathematician Abel was held at Christiania on 
September 5, 1902, on which occasion Professor Simon New- 
comb was the delegate of the Academy. He was also delegated 
to attend the meeting of the Council of the International Associa- 
tion of Academies in London, June 4, 1903. 
The eighth volume of the Memoirs, containing seven articles, 
was completed and published in 1902. 
1903-1907 
At the end of the third decade in its history, the number of 
original members of the Academy who still remained was, as 
already noted, but eight. At the end of the fourth decade, Janu- 
ary 1, 1904, all of these had died, save one. They comprised the 
naturalist, James D. Dana, who was the first Vice-President of 
the Academy (died in 1895); Benjamin A. Gould, the astron- 
omer (1896) ; James Hall, the paleontologist (1898) ; J. Peter 
Lesley, the geologist (1903); H. A. Newton, the astronomer 
(1896); J. D. Whitney, the geologist (1896); and Fairman 
Rogers, who was the first Treasurer of the Academy, and served 
in that capacity for sixteen years (1900). 
The Henry Draper Medal was presented on April 20, 1904, to 
Professor George E. Hale, Director of the Yerkes Observatory, 
for his important services to astronomy. ‘The report of the 
committee, which made the award contains the following state- 
ments regarding his labors: 
“The work of Professor Hale may be divided into four classes: Investigations 
of solar phenomena, studies of stellar spectra, editing the Astrophysical Journal, 
and the executive work involved in the direction of the Yerkes Observatory. 
In 1868, it was shown by Janssen and Lockyer, independently, that solar 
protuberances might be observed when the sun was not eclipsed. The method 
employed was to allow an image of the edge of the sun’s disk to fall upon the slit 
of a spectroscope, and thus obtain the spectrum of this region only. If the image 
