conferences and expositions at home and abroad. He was a found- 
er 
er of the Cosmos Club and later its President. In '1894 he was 
honored by the degree of Doctor of Science by George Washington 
University. 
On his seventieth birthday his associates in the several 
fields of activity in which he has engaged celebrated the occasion 
by preparing and presenting to him at a banquet in his honor, a 
profusely illustrated volume of essays of 500 pages, prepared for 
the occasion by the participants in the banquet, and entitled 
rr, The Holmes Memorial' Volume, 11 copies of which may be found in the 
principal libraries. 
Holmes eightieth birthday, December 1, 1926, was made 
especially notable by the presentation to him of a handsomely 
bound volume of letters written by one hundred and sixty of his 
friends and associates. This booh is a very precious memorial 
and is preserved in the library of the national Gallery of Art. 
Between his arrival at the Smithsonian Institution in 
1871 and the date of this writing, January 1929, he has led an 
active and most varied and interesting life devoted to science 
and art. A much broken story of these fifty-eight years is 
told in a multitude of publications of the period, official and 
non-official 
