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INDEX TO VOLUME I. 



Announcement, . . . . Page i 



Bechdolt, Charles J., Biographical Notice of, - " '47 



Birds, List of Winter, 



By Dr. L. Fussell and Sanford Omensetter 



Campanile, The, By Jacob B. Brown, - - "80 



China, The Great Wall of. By Jacob B. Brown, " 2 



Diatom Motion, The Nature of. By T. C. Palmer, " 116 



Easter Sunday and the Dominical Letter, J. B. Brown, 



El Morro, Spanish Inscriptions on. 



By Homer E. Hoopes and Henry L. Broomall 



Freezing Mixtures, Theory of. By T. C. Palmer, " gi 



Indian Implements at Chester, By T. C. Palmer, " 26 



Institute Notes, - - - - - 25,47 



Languages, The Co^nflict of. By Henry L- Broomall, " 126 



Minutes of Meetings, - Pages 24, 45, 94, 144 



Physiology, Plant, .... Page 139 



Plants, List of Delaware County, By Dr. L. Fussell, " 49 



Price, Edward A., Biographical Notice of, - " 47 



Reynolds, John T., Biographical Notice of, - " 143 



Speech, Significance of Errors in, By H. L. Broomall, " 30 



Stress, Internal, Lines of, By C. M. Broomall, " 77 



Sundial and the Clock, The. By Jacob B. Brown, " 97 



Vesuvius, - - - - - "96 



Water Supply, Local, By C. M. Broomall, - " 8 



Yarnall, Isaac S., Biographical Notice of, - " 142 



