DOUBLE NUMBER 



VOL. XXXVI SEPTEMBER, 1920 Nos. 1 & 2 



JOURNAL 



OF THE 



Elisha Mitchell Scientific Society 



CONTENTS 



Proceedings of the Elisha Mitchell Scientific Society, De- 

 cember, 1916, to March, 1920 1 



Proceedings of the N. C. Academy of Science 7 



The Theory of Relativity. Andrew H. Patterson 19 



A New Method for Laying Out Circular Curves by Deflec- 

 tions FROM the p. L T. F. Hickerson 42 



A Remarkable Form of Skeletal Element in the Lithistid 

 Sponges (a Case of Analogical Resemblance). H. V. 

 Wilson 54 



The Turtles of North Carolina. C. S. Brimley 62 



A Little Known Vetch Disease. Frederick A. Wolf 72 



Notes on the Mosquito Fauna of North Carolina. Frank- 

 lin Sherman 86 



An Interesting Fertilizer Problem. H. B. Arhuckle 94 



Azalea atlantica Ashe and Its Variety luteo-alba n. 

 VAR. T^. C. Coker 97 



A New Species of Achlya. W. C. Coker and /. N. Couch 100 



ISSUED QUARTERLY 



CHAPEL HILL, N. C, U. S. A. 



ENTERED AT THE POSTOFFICE AS SECOND-CLASS MATTER 



