188 INDEX OP SUBJECTS. 



Page. 



Halo, remarkable, witnessed at Washington, June 15 112 



High wind as a probable cause of the retardation of storm-centres at 



elevated stations 108 



House of Representatives, ventilation of 99 



Hypsometry, barometric 48 



Ice machine, Carre's 100 



Interest, accrued, on government securities 21 



Library of the Society 176, 180 



Life, organic compounds in their relation to 91 



Life, modern philosophical conceptions of 46 



Little Gull Island, July II, fog-signal tests 26 



July 15, 1881, observations at 28 



August 9, 1 88 1, observations at 30 



August 10, 1 88 1, observations at 32 



Lunar Eclipse of June II, 1S81 90 



Mammals, on the classification of insectivorous 1 18-120 



Members, list of 15 



Mollusks, some peculiar features of, found at great depths 90 



Officers of the Society 14, 85, 176 



Order, philosophical, of sciences 105 



Organic compounds in their relations to life 91 



Organic matter, building up of 97 



Panorama, exhibition of a photographic print including 140 degrees of — 21 



Power Circle, some of the properties of Steiner's 89 



Protoplasm, possibilities of 102 



Publication of the Bulletin, rules for the 13 



Quaternary climate of the Great Basin 21 



Ravages, peculiar, of Teredo navalis 98 



Sciences, philosophical order of 105 



Sherman, Wyoming, solar radiation at 101 



Shoes, influence of high-heeled "7 



Siemen's deep-sea thermometer 100 



Snow-storms, relation of, to audibility 3$ 



Solar radiation IGI 



Solar parallax, relative accuracy of different methods of determining 39 



Sound, anomalies of, from fog-signals 2 3 



Sound signals, anomalies of 39 



Spheres, geometrical, question relating to io 7 



Storage of electric energy 4° 



