18 ANNUAL, REPORT SMITHSONIAN INSTITUTION, 1920. 



Observatory, 23 reports on the Harriman Alaska expedition, and 

 564 reports of the American Historical Association, 



Throiio^h its publications the Institution carries out one of its 

 principal objects, the " diffusion of knowledge." The Smithsonian 

 series, except the annual report, are printed from Smithsonian funds 

 in small editions for distribution principally to libraries and scien- 

 tific and educational establishments throughout the world. The 

 annual report, containing a general appendix consisting of a num- 

 ber of articles illustrating recent advances in nearly every branch 

 of science, is printed by congressional appropriation in editions of 

 10,000 copies and is in great demand throughout the country. The 

 Museum and Bureau of Ethnology publications are discussed in 

 detail in the reports of those branches appended to this report. 



Of the Smithsonian Miscellaneous Collections, 14 numbers were 

 issued, among which may be mentioned 2 papers by your secretary 

 on his researches in Cambrian geology and paleontology, a paper 

 showing the relations between the variations in solar radiation and 

 in the weather, based on the work of the Smithsonian Astrophysical 

 Observatory on the solar constant of radiation, and a fourth revised 

 edition of the Smithsonian Meteorological Tables, for which there 

 is a continued demand. 



Allotments for f Tinting. — The congressional allotments for the 

 printing of the Smithsonian report and the various publications of 

 the branches of the Institution were practically used up at the close 

 of the year. The allotments for the coming year ending June 30, 

 1921, are as follows : 



For the Smithsonian Institution : For printing and binding the 

 annual reports of the Board of Regents, with general appendices, 

 the editions of which shall not exceed 10,000 copies $10, 000. 00 



{Provided, That the unexpended balance of the appropriation of 

 $10,000 made for this purpose in the sundry civil act approved 

 July 1, 1918, is hereby reappropriated and made available during 

 the fiscal year 1921) 5,220.99 



For the annual reports of the National Museum, with general appen- 

 dices, and for printing labels and blanks and for the bulletins and 

 proceedings of the National Museum, the editions of which shall 

 not exceed 4,000 copies, and binding in half morocco or ma- 

 terial not more expensive, scientific books and pamphlets presented 

 to or acquired by the National Museum library 37, 500. 00 



For the annual reports and bulletins of the Bureau of American Eth- 

 nology and for miscellaneous printing and binding for the bureau- 21,000. 00 



For miscellaneous printing and binding: 



International Exchanges 200. 00 



International Catalogue of Scientific Literature 100. 00 



National Zoological Park 200. 00 



Astrophysical Observatory 200. 00 



For the annual report of the American Historical Association 7,000.00 



