116 



Utrecht, Onderzoekingen gedaan in hetPhysiologisch Labora- 

 torium der Utrechtsche Hoogeschool. 4^^^ Reeks. Ill, 1. 



— Oogheelkundige Verslagen en Bybladen met het Jaar- 

 verslag van de Nederlandsch Gasthuis voor Ooglijders. 

 Nr. 35. 



— Akademische Schriften pro 1893—1894. 

 Washington, Proceedings of the United States National 



Museum. Vol. XV, 1892. Vol. XVI, 1893. 



— Bulletin of the United States National Museum. Nos 43, 46. 



— United States Coast and Geodetic Survey. Report 1891. 

 Part 2. 1892. Part 2. 



— United States Coast and Geodetic Survey Bulletin. Nos 

 28—30. 



— United States Geological Survey. 1 1 "^ annual Report 

 1889—1890. Parts I & II. 



— United States Geological Survey. 12"^ annual Report 

 1891 — 1892. Parts I & II. 



— United States Geological Survey. 13*'^ annual Report 

 1892—1893. Parts I, II & III. 



— Memoirs of the National Academy of Sciences. Vol. VI. 



— Annual Report of the Board of Regents of the Smithsonian 

 Institution to July, 1891, 1892. 



— Bulletin of the United States. Fish-Commission. Vol. XI. 1 89 1 . 



— Report of the Commissioner of Fish and Fisheries. Part 

 XVII for 1889 to 1891. 



— Smithsonian Contributions to knowledge, 884. The Internal 

 Work of the Wind by S. P. Langley. 



— Annual Report of the Board of Regents of the Smithsonian 

 Institution for the year ending June 30, 1891. 



— Bulletin of the U. S. Geological Survey. Nos 102— 1 17. 



— Monographs. XIX, XXI, XXII. 



— Mineral Resources of the United States. 1892 & 1893. 

 Wernigerode, Schriften des Naturwissenschaftlichen Vereins 



des Harzes. VIII. Jahrgang. 1893. 

 Wien, Ackerbauministerium. Statistisches Jahrbuch tur 1893. 

 Heft 1, 2'e Lieferung. 



— — Anbauflachen der Zuckerri'iben nach dem Stande vom 

 1. Juni 1894. 



