TABLi: OF COXTKXTr^. 



Proceedings of the Society 225 



Identification of the British Inch as the Unit of Measure of 



the Mound Builders. By J. Ralston Skinner 231 



Protozoa of the Cincinnati Group. By Prof. Jos. F. James. . 244 

 Remarks on a Variety of Nostoc pruniforme. By Cieorge B. 



Twitchell 253 



Observations on Photographic Appliances and their Uses. 



By L. M. Petitdidier 256 



Zoological Miscellany 261 



Additions to Library 267 



Index 



oF'-fici<:rs ok the societv — 1886-7. 



President, . . . Walter A. Dun, M. D. 



ist Vice-President, . . Wm. Hubbell Fisher. 



2nd Vice-President, . . J. Ralston Skinner. 



Secretary, ..... Davis L. James. 

 Treasurer, . . . . . S. E. Wright. 



MEMBERS OF THE EXECUTIVE BOARD AT LARGE. 



Rev. Raphael Benjamin. O. D. Norton, M. D. 



T. H. Kelley. Wm. H. Knight. 



LIBRARIAN. 



Geo. W. Harper. 



MEETINGS. 



Regular Meeting of the Society, First Tuesday of each month. 

 Executive Board Meeting, Third Tuesday of each month. 

 Photographic Section, First and Third Thursday each month. 

 Botanical Section, Second Saturday afternoon of each month. 

 Lyceum of Natural History, Saturdays at 10 a. m. and 2:30 p. m. 

 Free Lectures, Friday evenings in January, February and .March, 

 beginning January T4th. 



Subscription to the Journal, $2,00 a year of four numbers, 

 in advance. Single numbers, 60 cents. 



The Publishing Committee is under obligations to Robert 

 Clarke, Esq., of Cincinnati,' Erasmus Gest, Esq., of New York, 

 and Dr. L. B. Welch, of Wilmington, O., for the use of the elec- 

 trotype plates used to illustrate the article by Mr. J. R. Skinner, in 

 this number. The engravings furnished by the two former gentle- 

 men are now for the first time printed. 



