Chase.] 200 [June 19, 



of April. If we examine still more closely for clues which may be of 

 possible future service in the study of the reasons for accordance and 

 discordance, we find that in nineteen instances the discordance'is greater 

 than we should expect if it were merely casual ; in five, it is the same ; 

 and in forty-two it is less ; as will be seen by the following statement of 

 the numbers of discordances, and the curves by which they are severally 



shown : 



Excess of Discordance. 



20, Aug.— Nov.; 19, Jan.— Mar. ; Apl.— May, Apl.— Oct., May— Jul., 

 May — Dec, Nov. — Dec; 18, Jan. — Apl., Apl. — Jul., Apl. — Sep.; 17, 

 Jan. — Aug., Jan. — Oct., Apl. — Aug., Apl. — Nov., May — Jun.; 16, Feb. 

 — Aug., Mar. — May, Apl. — Jun., Sep. — Dec. 



Average Discordance. 



15, Jan. — Feb., Jan. — May, Feb. — Dec, Mar. — Apl., Jun. — Aug. 

 Excess of Agreement. 



14, Jan.— Sep., Feb. — May, Mar. — Aug., Mar.— Nov., Apl. — Dec, Oct. 

 — Nov.; 13, Jan. — Dec, Mar. — Sep., Mar. — Dec, Aug. — Sep.; 12, Jan. — 

 Jul., May — Aug., May — Nov., Jun.^ — Dec, Jul. — Sep., Jul. — Dec; 11, 

 Feb.— Apl., Feb — Jun., Feb. — Jul., Feb.— Sep., Mar. — Jun , Jun. — Oct., 

 Jul.— Aug., Jul.— Nov., Oct.— Dec; 10, Jan.— Jun., Feb.— Oct., Feb.— 

 Nov., Mar. — Oct., May — Oct., Jun.— Jul. , Jun. — Sep.; 9, Mar. — Jul., 



