641 



Postal card acknowledgments of the receipt of Proceed- 

 ings were received from Mr. Birch, London (81 to 91), and 

 from various corresponding Societies and members. 



A letter of envoy was received from the Netherland Bo- 

 tanical Association, per Mr. W. Hunter, Ass. Sec. Dep. State, 

 Washington, August 4th, 1875. 



A postal card circular was received from the Society of 

 Biblical Archaeology, London. 



Donations for the Library were received from the Acade- 

 mies at Berlin, Copenhagen, and Brussels ; the Geographical 

 Society at Paris ; Revue Politique ; MM. I'abbe Ducroix 

 and Arcelin, at Macon ; Nouvelles Meteorologiques ; San 

 Fernando K. Observatory; Meteor. Office; London ISTature ; 

 Pev. O. Fisher, of Cambridge, England ; Silliman's Journal ; 

 Prof. P. Pumpelly; Prof. 0. C. Marsh; Prof. E. D. Cope; 

 Dr. J. S. N'ewberry ; Prof. E. B. Andrews ; Prof. E. T. Cox ; 

 Boston IsT. H. S. ; Franklin Institute ; Journal of Phar- 

 macy ; Penn Monthly ; M. H. Y. Louderbach ; Medical 

 ISTews ; Mr. Trantwine ; Dr. Ellicott Cowes ; American 

 Chemist ; Buffalo I*^at. Hist. Society ; Argentine Observa- 

 tory and Meteorological Office ; and from the University of 

 California. 



Lieut. Col. P. S. Williamson communicated by letter, 

 dated San Francisco, July 16th, Meteorological Observations 

 taken by himself on the i^ile during January and Febru- 

 ary, 1873. 



Mr. Chas E. Hall communicated, through the Secretary, 

 Kotes on Glacial action along the Kittanning or Blue Moun- 

 tain, in Carbon, JSTorthampton, and Monroe Counties, Penn- 

 sylvania. 



Prof. P. E. Chase read a communication On the beo;innino;s 

 of Development. 



Prof. Sadtler communicated his recent researches in the 

 laboratory of the University On the Molecular Structure of 

 Glyceric acid. 



Mr. Briggs expressed certain fundamental views in Me- 

 teorology, and announced his intention of communicating at 



