528 



[Oct. 18, 



A letter from tlie Geological Survey of Alissouri requestiug 

 exchanges, wliicli on motion was so ordered. 



Letters of acknowledgment were received from tbe Deutsche 

 Geologisclie Gesellscliaft, Berlin (127); Academic Royale des 

 Sciences, Lisbon (Transactions, xvi, 1 ; Proceedings, 128) ; Phil- 

 lips Academy, Andover, Mass. (Transactions [N. S.], i-xv, 

 xvi, 1; Proceedings, 96-110 ; Catalogue, Parts i-iv) ; Rev, J. A. 

 Murray, Carlisle, Pa. (128). 



Acknowledgments for 129 : Prof. Serge Nikitin, St. Peters- 

 burg; Prof, Peter R, von Tunner, Leoben, Austria; K. K. 

 Central Anstalt liir Meteorologie und Erdmagnetismus, Dr. A. 

 Brezina, Yienna ; Deutsche Geologisclie Gesellschaft, K. P. 

 Meteorologische Institut, "Naturwissenschaftliche Wochen- 

 schrift," Berlin ; Verein fiir Erdkunde, Dresden ; Vogtliindische 

 AltertumsforschendeYerein, Hohenleuben; Verein fiir Thurin- 

 gische Geschichte und Alterthumskunde, Jena ; Verein fiir 

 Naturkunde, Ofl'enbaoh a. Main ; Dr. Carl August Dohrn, 

 Stettin ; R. Comitato Geologico, Rome ; Prof Abel Hove- 

 lacque, Paris ; Prof. Lucien Adam, Rennes, France ; Royal 

 Dublin Society ; Royal Society of Edinburgh ; University 

 Library, Prof J. P. Postgate, Cambridge, Eng. ; Society of 

 Antiquaries, Mr. C. Juhlin Dannfelt, Sir James Paget, Lon- 

 don ; Literary and Philosophical Society, Manchester ; Sir 

 Henry W, Acland, Prof, J, J. Sylvester, Oxford ; Dr. Alfred 

 R. Selwyn, Ottawa, Canada ; Rev, J, A. Murray, Carlisle, Pa, ; 

 Dr. D. G. Brinton, IMedia ; Messrs. Samuel Castner, Jr., Edwin 

 J. Houston, George Stuart, Philadelphia ; Elisha Mitchell 

 Scientific Societ}^, Chapel Hill, N, C. ; Mr, Everard F, im 

 Thurn, Georgetown, British Guiana, 



Letters of envoy were received from the K. P, Akademie 

 der Wissenschaften, Berlin ; Citizens' Committee of the Con- 

 stitutional Centennial Celebration, Philadelphia. 



Accessions to the Library were announced from the R. Geo- 

 logical Society of Australia (N. S. W. Branch), Sydney; K. 

 K. Geologisclie Reichsanstalt, Vienna ; K. Akademie der Wis- 

 senschaften, Berlin ; Neues Archiv fiir Siichsische Geschichte 

 und Altertumskunde, Dresden ; Prof E. Renevier, Lausanne ; 



