Melbourne, Australia ; Royal Asiatic Society (Straits Branch), 

 Singapore; Socie'te de Geographic de Finlande, Helsingfors; 

 Universite Royale, Lund; Fondation de P. Teyler van der 

 Hulst, Harlem ; Osservatorio Marittirno dell' i. k. Accaderaia 

 di Nautica, Trieste ; K. Geologische Landesanstalt und Berg- 

 akademie, Prof. F. Reuleaux, Berlin ; Wiirtembergische Vier- 

 teljahrshefte fiir Landesgeschichte, Stuttgart ; Societe de Geog- 

 raphic de Lille ; Royal Statistical Society, Meteorological Office, 

 London ; Mr. W. Sinclair, Glasgow ; Boston Society of Nat- 

 ural History ; Department of State, United States Geological 

 Survey, Smithsonian Institution, Washington, D. C. ; Public 

 Ledger Family, Philadelphia ; Observatorio Nacional, Oficina 

 Meteorojogica Argentina, Cordoba, S. A. 



Letters of acknowledgment (Transactions, xvi, 3) were re- 

 ceived from the Socie'te Royale de Zoologie, Amsterdam ; 

 Fondation de P. Teyler van der Hulst, Harlern ; Bataafsch 

 Genootschap der Proefondervendelijke Wijsbegeerte, Rotter- 

 dam ; R. Accademia dei Lincei, Rome ; K. Bibliothek, Berlin ; 

 Philosophical Society, Cambridge ; Royal Society, Royal In- 

 stitution, Royal Astronomical Society, Society of Antiquaries, 

 London ; Radcliffe Observatory, Oxford ; Royal Society of 

 Edinburgh ; Boston Society of Natural History. 



Letters of acknowledgment were received from Dr. Julius 

 Platzmann, Leipzig (127); R. Academia de la Historia, Mad- 

 rid (128, 129, 130): University Library, Cambridge. Eng. 

 (133); Radcliffe Observatory, Oxford, Eng. (127-133) ; Uni- 

 versity of Toronto, Canada (99-133, Catalogue, Pts. i-iv, etc.) ; 

 Dr. John M. Maisch, Mrs. Helen Abbott Michael, Philadel- 

 phia (128, 129, etc.); University of Iowa, Iowa City (125, 

 128, 129) ; Messrs. Lyman B. Hall (133), John A. Ryder, Ben- 

 jamin Sharp, Philadelphia (128, 129, 132, 133). 



Acknowledgments (129) were received from Mr. Samuel 

 Davenport, Adelaide, S. Australia ; Imperial Academy of Sci- 

 ence, St. Petersburg ; Prof. Paul Hunfalvy, Buda-Pesth, Hun- 

 gary ; Universit^ Royale, Lund ; South African Philosophi- 

 cal Society, Cape Town ; Centralblatt fur Physiologic, Berlin ; 

 Dr. Otto Bohttingk, Leipzig ; Academie Royale des Sciences, 

 Lisbon, Portugal. 



