1892.] 



293 



Science?, Throndbjem ; University Royale, Lund, Sweden, 

 Musce Teyler, Harlem, Holland ; Maalschappij der Neder- 

 landscbe Letterkunde, Leiden, Holland ; Naturforgcbende 

 Verein, Briinn, Austria; K. Akademie der Wissenscbaften, 

 Berlin ; K. Sacbsiscbe Gesellscbaft der Wissenscbaften, 

 Leipzig; Gesellscbaft zur Beforderung der gesammten Natur- 

 wissenscbaften, Marburg ; Centralbureau der luternationalen 

 Erdmessung, Potsdam, Prussia; Altertumsverein fiir Zwickau 

 uud umgegend, Zwickau, Saxony ; Ecole Polytecbnique, 

 Bureau des Longitudes, Musee Guimet, Paris; ^leteorological 

 Office, Royal Statisiical Society, London, Eng. ; Royal Irisb 

 Academy, Dublin ; Geological Survey of Pennsylvania, Har- 

 risburg; U. S. Fisb Commission, Wasbington, D. C. ; Univer- 

 sity of Wisconsin, Madison. 



Letters of acknowledgment (Transactions xvii, 1 and 2) 

 were received from tbe Observatoire Pbysique Central de 

 Russie, St. Petersburg ; Geological and Natural History Sur- 

 vey, Ottawa, Canada ; Museum of Comparative Zoology, 

 Cambridge, Alass. ; American Antiquarian Society, Worcester, 

 Afass. ; Yale University, New Haven, Conn. ; State Library, 

 Albany, N. Y. ; Buffalo Library, N. Y. Historical Society, 

 New York ; New Jersey Historical Society, Newark ; Acade- 

 my of Natural Sciences, Franklin Institute, Library Company, 

 Pbiladelpbia ; U. S. Geological Survey, Wasbington, D. C. ; 

 University of California, Berkeley ; California Academy of 

 Sciences, San Francisco; State Historical Society of Wiscon- 

 sin, Madison. 



Letters of acknowledgment were received from tbe Institut 

 Egyptien, Cairo (135); R. Society of N. S. Wales, Sydney 

 (135); I. Academy of Sciences (13(3, 137), Russian Cbemical 

 Society, St. Petersburg (136); Observatory, Tascbkent (136); 

 Universite Royale, Lund, Sweden (132-136); Societe Hong- 

 roise de Geograpbie, Budapest (136); K. K. Central Anstalt 

 fiir Meteorologie, etc. (137), K. K. Naturbistoriscbes Hofmu- 

 seum (136), Prof. Franz v. Hauer (134-137), Dr. Frederick S. 

 Krauss (134-136), Drs. M. Mucb, Frederick Muller (136), 

 E. Suess (135, 136), Vienna, Austria; Naturforscbende Gesell- 



PUOC. AMER. PHILOS. SOC. XXX. 139. 2l. I'RIKTED JAN. G, 1893. 



