NO. 1/ SMITHSONIAN EXl'LORATIONS, 1 9 1 6 I3I 



vocabulary so far known and the only known vocabulary of Akokisa. 

 A photostat copy of this was secured later, and similar copies of 

 several other original manuscrijits or copies of originals : one a 

 second French memoir giving a considerable account of the Choctaw 

 Indians, and censuses, town l)y town, of both the Choctaw and the 

 Creeks, another an enumeration of the Louisiana Indians. ap])arently 

 by Bienville, and a third a Spanish census of the Indians in Morida 

 in the early part of the eighteenth century, which includes the town, 

 the name of eacb Indian, and his approximate age. This library 

 also preserves what appears to be the original manuscrii)t from 

 which the Mciiioircs Ifistoriqucs sur La I.oidsianc of Dumont de 

 Montigny was composed. ( )n the basis of the material enumerated 

 it is now possible to classify exactl}' the little known Akokisa. Washa, 

 and Chaouacha tribes, and to add considerably to our knowdedge 

 of the Indians north of the Gulf of Mexico in other ])articulars. 



VISIT TO THE CHP:R0KEE INDIANS 



Owing to impaired health the field-work of Mr. James Mooney 

 in 1916 was confined to a visit of about ten weeks ( May 28-August 

 10) to the old Cherokee country in western North Carolina, during 

 which time he visited the ])rincipal Indian settlements and railroad 

 towns and added to his information on the tribal folklore, besides 

 securing several important documents bearing on the partici])ation 

 of the Cherokee in t!ie Confederate service during the Civil \\'ar. 



SOLAR RADIATION OBSERVATIONS AT MOUNT WILSON 

 The Smithsonian Astrojihysical ( )bservatory has a station at 

 Mount Wilson, California, on ground leased from the Mount Wilson 

 Solar Observatory of the Carnegie Institution. In 1916, as in former 

 years since 1905. observations of the intensity of solar radiation 

 were made there during the months June to ( )ctober by Messrs. 

 Abbot and Aldrich. 



In the course of the research, now continued for more than 

 a decade, the variability of the sun has been definitely proved. 

 Expeditions for checking Mount Wilson results were conducted 

 to Algeria in 191 1 and 1912, and simultaneous measurements in 

 California and Algeria confirmed the reality of the suspected varia- 

 tions of the sun. Further confirmation was obtained at Mount Wilson 

 in 191 3, and subsequently. b"or it was found that the distribution of 

 brightness over the solar disk is variable in association with the 

 sun's total radiation. Not only does the sun's radiation fluctuate 



