204 BUREAU OF AMERICAN ETHNOLOGY (hull. 34 



In all, 146 cases, very prol^ably all of grand inal in various degrees, 

 in 47 localities. No cases were reported from 55, or a little more than 

 half of the schools and reservations. The proportion of epileptics to 

 the total Indian population would be 1.17 per thousand, which is 

 quite near the mean proportion among whites. In central and 

 southern Europe, according to Hirsch's summary," an approximate 

 estimate would put the average frequency of the disease at about 1 or 

 1.5 per 1,000 inhabitants. In France it ranges in the various depart- 

 ments from 0.5 to 3.4, and among Italian conscripts from 1.3 to 5.1 

 per thousand. The tribes most afflicted with the disease are: 



Epileptics I Epileptics 



per 1,000. I por 1,(K)0. 



Lower Brule Sioux 8.5 I Yankton Sioux 3.5 



Menominee 7.8 Piegan .3. 4 



Walapai 5. 8 Flathead Agency Indians 2.7 



Cheyenne (Cantonment) 5.7 Oglala Sioux 2. 5 



Lower Yankton Sioux 4.9 Shoshoni and Bannock 2.2 



Sioux (Rosebud agency) 4. fi < Sisseton Sioux 2. 1 



Winnebago 3. 7 i 



It is noticeable that half of the tribes where epilepsy is prevalent 

 are branches of the Sioux and that 10 of the 13 tribes live in cold 

 regions. 



Among the 146 epileptics 76 were males and 70 females; that is, 

 nearly equal proportions of the two sexes. As to age, 35 of the males 

 were adults and 41 adolescents and children,while among the females 

 32 were adults and 38 young. It is evident that the disease develops 

 in most cases during the period of growth. 



Idiocy, all grades of feeble-mindedness included, is, it appears, 

 widely distributed. The reported cases were as follows: 



5 Apache (1 male child, 2 male adults, and 2 female chil(b-en), at the Fort Apache 



agency, Ariz., in a population of 2,058. 

 3 Apache (all male children), at the Mescalero agency, N. Mex., in a population of 4G0. 



1 Apache (male child), at the Jicarilla agency, N. Mex., in a population of 780. 



2 Apache or Kiowa (1 male adult and 1 female child), at Fort Sill, Okla., in a popula- 



tion of 298. 



3 Arapaho (2 female children and 1 female adult), at Cantonment, Okla., in a popula- 



tion of 237. 

 1 Cheyenne (male adult), at Cantonment, Okla., in a population of 528 

 1 Cheyenne (male child), at the Seger School, Okla., in a pf)pulation of 551. 

 1 Indian (female child), at the Cheyenne and Arapaho agency, Okla., in a population 



of 1,297. 



4 Indians (1 male and 3 female adults), at the Cheyenne River agency, S. Dak., in a 



population of 2,477. 



1 Coeur d'Alene (male adult), at the Colville agency, Wash., in a population of 577. 



3 Crows (2 male children and 1 female child), at the Crow agency, Mont., in a popula- 

 tion of 1,826. 



2 Indians (1 male and 1 female adult), at the Fort Peck agency, Mont., in a population 



of 1,651. 



a Handbook of Geographical and Historical Patluilogy, 537, in. 



