542 



GENERAL INDEX. 



[38 



Seismological investigations, v, 97. 

 See Earthquakes. 



Selwyn, A. R. C, tracks in rocks of the 

 Animikie group, ix, 145. 



Seymour, A. B., Index of the Fungi of 

 TJ. S., vii, 79. 



Shaefer, A. W., Pennsylvania Geology, 

 i, 227. 



Shaler, N". S., geology of Cobscook Bay, 

 ii, 35 ; fluviatile swamps of New Eng- 

 land, iii, 210 ; Cambrian of Bristol Co., 

 Mass., vii, 76; Martha's Vineyard, 

 vii, 502. 



Shea, D. W., calibration of an electrom- 

 eter, v, 204. 



Sheldon, S., magnetism of nickel and 

 tungsten alloys, viii, 462 ; neutraliza- 

 tion of induction, ix, 17; magneto- 

 optical generation of electricity, xl, 

 196. 



Shepard, J. H., Inorganic Chemistry, i, 

 221. 



iSherburn, C. D., Bibliography of Foram- 

 inifera, vi, 295. 



Sherman, 0. T., spectrum of comet C, 

 1886, ii, 157; atmosphere of /3 Lyrae, 

 iii, 126. 



Shufeldt. R. W , Outlines for a Museum 

 of Anatomy, i, 408. 



Silver in volcanic ash, iv, 159. 

 See Chemistry. 



Sky, blue color of, Crova, viii, 491. 



Slag having composition of fayalite, i, 

 405. 



Smith, B. G., Rock-forming minerals, i, 

 156; pseudomorphs of limonile after 

 pyrite, i. 376. 



Smith, J. D , Enumeratio Plantarum 

 Guatamalensium, etc., Pt. I, vii, 419. 



Smith, R. H , Graphics, vii, 504. 



Smith, S , list of dredging stations in N. 

 American waters, from 1867-1887, 

 vii, 420. 



Smith. S. I., obituary notice of 0. Harger, 

 v, 425. 



Smith. "W. B., crystal beds of Topaz 

 Butte, iii, 134. 



Smithsonian Institution, Annual Report, 

 vi, 78. 



Snow, conductivity, etc., of, ii, 481. 



Soil, nitrifying organisms in, iii, 420. 



Soils, fixation of nitrogen in, i, 391. 



Solar corona, Bigelow, xl. 343. 

 See Sun and Spectrum. 



Solids, flow of. Hallock, iv, 277; v, 78; 



vi, 59; criticism of Hallock, v, 78; 



powdered, compression of, Spring, vi, 



286; viscosity, Barus, vi, 178; chem. 



action between, Hallock, vii, 402. 



Sohms-Laubach, G. zu, Einleitung in die 

 Palaophytologie, etc., vi, 72. 



Solubility and fusibility, vi, 383. 

 Solutions, blue, absorption spectra, 

 Pitcher, vi, 332 ; character of, iv, 483 ; 

 xl, 1 63 ; concentration by gravity, v, 

 75 ; tartrate circular polarization, 

 Long, vi, 351, viii, 264, xl, 275. 

 Sound, diffraction of, Stevens, vii, 257. 



velocity of, v. 252, 495. 

 South A_merica, geology of northern, 

 Karsten, ix, 319. 



Carolina, geol. report, i, 73. 

 Spectra, absorption, v, 412. 



of blue solutions, Pitcher, vi, 

 332. 



of liquid oxygen and liquefied 

 air, iv, 63. 



of mixed liquids, Bostwick, vii, 

 471. 

 of chemical elements, structure of, 

 Rydberg, ix, 400. 



coincidence between lines of differ- 

 ent, Love, v, 252 ; Runge, xl, 165. 

 heat-, invisible, Langley, i, 1. 

 of hydrogen, oxygen and water va- 

 pors, iv, 399. 



influence of light-producing layers 

 upon, v, 253. 

 metallic, Hutchins, vii, 474. 

 photographic study of stellar, i, 407. 

 ultra violet, of metalloids, Deslan- 

 dres, vi, 388. 

 See Spectrum. 

 Spectral lines, distinction between solar 



and terrestrial, iii, 70. 

 Spectro-photometric comparison of light, 



Nichols and Franklin, viii, 100. 

 Spectroscope, Index to Literature of, 

 Tuckerman. vi, 303, 388. 



new photographic, Hutchins, iv, 58. 

 new universal chemical, iii, 67. 

 Spectroscopic optometer, i, 60. 

 Spectrum, absorption of oxygen, vii, 224. 

 analysis. Grunwald's hypothesis, vi, 

 67. 



steam in, Trowbridge and Sa- 

 bine, vii, 114. 



use of interference fringes, v, 

 495. 

 of aqueous vapor, mountain study 

 of, Cook, ix, 258. 



aurora, wave-length of principal line 

 in, Huggins, viii, 75. 

 of cadmium, i, 426. 

 carbon, Kayser & Runge, viii, 411. 

 of comet C, 1886, Sherman, ii. 157. 

 of cyanogen and carbon, vii, 227. 

 of gases at low temperature, Koch, 

 viii, 491. 



of hydrogen, Thomas and Trepied, 

 viii, 491. 



infra red solar, Abney, vi, 291. 



