INDEX. 813 



Page. 



Appropriation for preservatiou of collections 185 



Armory building 185 



publication of ethnological material 182 



repayment of freight on Naval Observatory publications.. 183, 184 



War Department publications 180 



sewerage ^ 13, 173, 184 



transfer and arrangement of collections presented at the 



Centennial Exhibition 185 



ArchaBological explorations 39 



Archeology, department of 101 



progress in, in 1881 500, 502 



ArchaeopterygidsB, characteristics of 487 



Archegoniata 405 



Architects of the National Museum, report of 177 



Archives of the Museum, preservation of 98 



Arkansas, Independence County, mounds in 541 



Johnson County, ancient rock inscriptions in 538 



Armory building, ajipropriation for 170 



used for storage 12 



Art and industry in Museum 99 



Arthropods, bibliography of 431 



Arthur, Chester A., president ex officio Smithsonian "Establishment" xv 



Eegent vui 



appointment of Kegents by IX 



Ashland County, Ohio, mounds and earthworks in 593 



Asphalt um foot-walks, appropriation for 186 



Aspii'ators for Museum building 11, 174 



Assay laboratory in Museum building 11 



Asteroids 220 



Astronomical announcements by telegraph 28 



Astronomical bibliography 229 



Astronomy, progress in, in 1881, by E. S. Holden 191 



Asteroids 220 



August shooting stars 217 



Bibliography of 229 



Comets 213 



Companion of Sirius " 202 



Cluster measurements 191 



Double stars 202 



Etna Observatory 224 



Faye's periodic comet 21G 



Fixed stars 192 



Instruments and methods employed 197, 224 



Jupiter 220 



The Moon 220 



Nebulae and clusters 191 



Observatories 223 



Origin of the English mile 219 



Parallax of stars 195 



Planets 219 



Saturn 222 



Solar parallax 207 



Solar system 202 



