13] 



VOLUMES XXXI-XL. 



517 



Dwight, "W. B., fossiliferous Potsdam at 

 Poughkeepsie, i, 125; fossils from 

 Canaan, N. Y., i, 248. 



clay-beds on the Hudson, ii, 241. 



fossils of Canaan, N. Y., iii, 410. 



Potsdam, and Pre-Potsclam near 

 Poughkeepsie, N. Y., iv, 27. 



explorations in Yfappinger Valley 

 limestones, If. Y., viii, 139. 



fossils of Dutchess Co., 1ST. Y., ix, 

 71 ; of the Taconic at Hillsdale, N. Y., 

 xl, 256. 



E 



Eakins, L. G-., ptilolite, ii, 117; on xan- 

 thitane, v, 418 ; two sulphantimonites, 

 Col., vi, 450 ; new stone meteorite, ix, 

 59 ; meteoric iron from N. Carolina, ix, 

 395. 

 Earl, J., Laboratory work, xl, 331. 

 Earth currents, iii, 307 ; iv, 399. 



and luminiferous ether, relative mo- 

 tion of, Michelson and Morley, iv, 

 333. 



mathematical theories of, "Wood- 

 ward, viii, 337. 



rigidity, proof of, Becker, ix, 336. 

 Earthquake countries, construction of 



buildings in, Milne, xl, 262. 

 Earthquakes, American, Rockwood, ii, 7. 

 of Andalusia, 1884, v, 313. 

 in California, Holden, vii, 392. 

 Charleston, iii, 71; Neweomb and 

 Dutton, v, 1. 



Japanese, iv, 68. 

 magnetic effect, iii, 423. 

 observations of, methods for, v, 97. 

 intensity in San Francisco, v, 427. 

 in Switzerland, iii, 312. 

 Eaton, A., Geological work, i. 399. 

 Eaton, D. C, notice of Gray's Manual, 



ix, 240. 

 Eclipse, 1887, in connection with elec- 

 tric telegraph, Todd, iii, 226. 



expedition in Japan, Todd, vi, 474. 

 Egleston. T., decay of building stones, 

 ii, 243 ; Catalogue of Minerals and 

 Synonyms, viii, 494. 

 Ehlers, E., Report on Annelids, v, v 424. 

 Eichler, A. W., Flora Brasihensis. i, 158; 

 Jahrbuch des botanischen Gartens, 

 iii, 82. 

 Einhorn, A., force function in crystals, 



i, 69. 

 Eldridge, G. H., on grouping formations 



of middle Cretaceous, viii, 313. 

 Electric arc, compared with sunlight, 

 Langley, viii, 438. 



batteries, internal resistance meas- 

 ured, Peirce and Willson, viii, 465. 



Electric cell, standard, Clarke, Carhart, 

 viii, 402. 



bichromate of soda, Harding, 

 iii, 61. 

 charges, negative, dissipation by 

 sunlight and daylight, Elster and 

 Geitel, viii, 411. 



conductivity of liquids, effect of 

 pressure on. Barus, xl. 219. 



current, effect of magnetic force on 

 equipotential lines of, Hall, vi, 131, 

 277. 



currents, alternating and continu- 

 ous in relation to the human body, 

 Lawrence and Harris, xl, 420. 



measurement of, Kennelly, vi, 

 453. 



direction and velocity, Nichols 

 and Franklin, vii, 103. 



arising from deformation, vii, 

 495. 

 dilatation of quartz, vii, 495. 

 Directory, vii, 504. 

 discharges in gases and flames, 

 Wiedemann and Ebert, vi, 467. 



in magnetic fields, Witz, xl, 

 331. . 



surface transmission of, Car- 

 hart, i, 256. 

 disturbances, velocity of transmis- 

 sion, Thomson, xl, 330. 



field, effect of moving dielectric in, 

 Rontgen, vi, 467. 



lights compared photometrically, 

 viii, 100. 



oscillations in air, Trowbridge and 

 Sabine, xl, 1 66. 



oscillatory discharge, ix, 519. 

 potential, measured by work, Mayer, 

 ix, 334. 



radiation, viii, 75, 217. 

 ratio of electromagnetic to electro- 

 static units, viii, 289, 298. 



resistance, B. A. unit, viii, 230 ; of 

 batteries, viii, 465. 



of soft carbon, Mendenhall, ii, 

 218. 



of stressed glass, Barus, vii, 

 339. 

 standards, iv, 399 ; the ohm, iv, 

 228. 



undulations, Sarrasin andDe la Rive, 

 ix, 233. 



units, names adopted, viii, 410. 

 vibrations, in rarefied air without 

 electrodes, Moses, ix, 400. 



waves in conductors, viii, 246. 



experiments on, vi, 387 ; vii, 

 227, 316, 409; ix, 233; xl, 166, 

 330. 



