167 



Utrecht. Provinciaal Utrechtsch Genootschap van Kunsten en 

 Wetenschappen: 



— — Aanteekeningen van het verhandelde in de sectie-vergaderingen, 1909. 



— — Verslag van het verhandelde in de algemeene vergadering, 1909. 



IVarschau. Societe scion tit'ique: 



— — - Comptes rendus (SprawozJania), rok 1, 1908, zeszyt (3 — 8; lok 2, 



1909, zeszyt 2—9. 



— — Prace, No 1. 



Washington, Carnegie Foundation for the Advancement of 

 Teaching: 

 Annual Report, 4, 1909. 



— Carnegie Institutio n: 



— — Annual Report of the Mount Wilson Solar Observatory, 1908. 



— — Contributions from the Solar Observatory Mt. Wilson, California, 



No 29, 31-42, 44. 



Year Book, No 6, 1908. 



Publications, No 73 (1, II), 85, 90, 102, 103, 104, 107, 108, 110, HI, 



112, 113, 114, 117, 118. 



— Coast and Geodetic Survey: 



— — Geodesy. The figure of the earth and isostasy from measurements in 



the United States, by J. F. Hayford. 



Precise levelling in the United States, 1903—1907. 



Report of the Superintendent, 1907—1908. 



— Department of Agriculture: 

 Yearbook, 1908. 



— Department ofCommerce and Labor (Bureau of Standards): 

 Bulletin, vol. 5, No 3, 4; vol. 6, No 1, 2. 



— Nautical Almanac Office: 



— — The American Ephemeris and Nautical Almanac 1912. 

 — The Star List of the American Ephemeris for 1909. 



— - Naval b s e r V a t o r 3' : 



— — Synopsis of the Report for 1909. 



— Patent Office: 



Official Gazette, vol. 143, No 2. 



— Philosophical Society : 

 Bulletin, vol. XV, pp. 103—131. 



— Smithsonian Institution: 

 Annual Report, 1907. 



— — Smithsonian Mathematical Tables. Hyperbohc functions, prepared by 



G. F. Becker and E. van Orstrand. 



