PROCEEDINGS, VOLS. 1-50 



DURAND-ELEC 



Durand, Elias. Arctic plants, 6, 186. 



obituary notice of Frangois 



Andre Michaux, 6, 223. 



, of Thomas Nuttall, 7, 297. 



Dutton, Clarence E., causes of re- 

 gional elevations and subsidences, 

 12, 70. 



Dwight, Thomas, psoas parvus and 

 pyramidalis, variation in, 31, 117. 



Dykes, trap, in Archaean rocks of 

 southeastern Pennsylvania, 21, 691. 



Dynamic induction Ijy a galvanic cur- 

 rent, I, 135. 



D3'namo-electric machines, circum- 

 stances influencing efficiency of, 

 18, 5S 



Earth, dimensions of the, 3, 130. 



— past history of the, 48, 119. 



— physics of the, 47, 157. 



— temperature, secular cooling and 

 contraction of, 46, 191. 



— topography as affected by rotation 

 of the, 13, 190. 



Earth's orbit, comparative energy of 

 action and reaction at the source 

 of solar radiation and at, 10, 261. 



Earthquake at Aix-la-Chapelle. 18, 

 216. 



— of 4th of Januarv, 1843, 2, 258, 

 267. 



— San Francisco, of 1906, 45, 164, 

 178. 



Earthquakes, 3, 64. 



— ancient and modern theory of, 

 46, 191. 



— cause of, 45, 274; 48, 235. 



— establisment of National bureau 

 for study of, 48, xii. 



— mountain formation, new theory 

 of, 46, 369. 



Echo, experiments to determine the 

 depth of the sea by the, i, 39. 



Eckfeldt. A., aluminum, 6, 141, 148. 



— • specific gravity apparatus, 6, 193, 

 201. 



Eckfeldt, Jacob R., obituary notice 



of, 12, 547. 

 Eclipse, solar, of 1836 and 1838. i, 31, 



35. 44, 48, 50, 58, 64, 107, 177. 

 of 1846, 4, 253. 



— — of May 26, 1854, 6, 38. 



of Aug. 7, 1869, II, 204. 



of July 29, 1878, 18, 103. 



Eclipses, solar, i, 132, 177; 2, 201; 



3, 1B3; 5, 32. 



Economies, classification of, 41, 169. 



Ectophylla alba, skull and teeth of, 

 19, 267. 



Eddy, Henry T., radiant heat, an ex- 

 ception to the second law of ther- 

 modynamics, 20, 334. 



Edentata, bones of a fossil animal of 

 the order, 2, 109. 



Edmunds, George F., international 

 arbitration. 36, 320. 



Egypt, resources, productions and so- 

 cial condition of, 14. 232. 



Egyptian character of Hebrew 

 names, 20, 506. 



— element in the names of Hebrew 

 kings, and its bearing on the his- 

 tory of the Exodus, 19, 409. 



— ethnography, 2, 239; 3, 115. 

 Egyptology, manual of, 20, i. 

 Elasmobranch genus Didymodus, 



structure of the skull in, 21, ^~2. 

 Elastic force, unity of, 9, 425. 

 Elbow joints, false, 30, 285. 

 Electric and other elastic currents, 



mechanical modification of, 9, 355. 



— muscular sensibility, measure of, 



6, 291. 



Electrical phenomena, remarkable, 



7, 385. 



— progress since 1743, 32, 104. 

 Electricity and matter, modern theory 



of, 50, 321. 



— as a motor, 37, 8. 



— disruptive discharges of, through 

 flames. 50, 397. 



— death penalty by, 47. 39- 



27 



