INDEX. 



607 



Souillart, 32, 



Sound in organ-pipe?, cause of, 179. 



obliteration of one, by another, 181. 

 Sounding, deepest, 241. 

 Soutli, 42. 



South Africa, salmon eggs in, 40S, 

 Foreland Light-house, 4G0. 

 Southwell, 83. 

 Spain, coal-fields of, 22G. 

 Spectra, measuring bauds of, 2C6. 

 of gases in meteors, 28. 

 of the nebulie, 26. 

 Spectroscopes, improvement in, 153. 

 Spectroscopic diameter of the sun, 57. 



examination of blood-stains, 



270. 

 observatory at Calcutta, 40. 

 Spectrum apparatus for the new observa- 

 tory at Potsdam, 154. 

 dispersion of gases, 153. 

 observations of the stars, 48. 

 of Coggia's comet, 37. 

 Spence-Bate, 334. 

 Sperenberg, near Berlin, 119. 

 Sperm and whale oil, 386. 

 Spermophilus citillus, 382. 

 Spider, a noise-producing, 329. 

 Sponges, bleaching, 501. 

 Sporer, Prof., 56. 

 Spottiswoode, 290. 

 Spring, indications of, 82. 

 Springmuhl, Dr., 435. 

 Squirrels' tails' hair for brushes, 503. 

 Staircases, construction of winding, 411. 

 Standard time in Switzerland, 41. 

 Stanford, Governor, 402. 

 Star, ancient discovery of a variable, 31. 

 Beta Leporis, 23. 

 7 Coronse Australis, 22. 

 01 Cygni, 24. 

 70 {])) Ophiuchi, 23. 

 Stars, classification of double, 24. 

 in daytime, visibility of, 04. 

 motion toward and from the earth, 



19, 

 observed at Ilarvard Observatory, 



fundamental, 53. 

 proper motions of southern, 22. 

 Iladcliffe's third catalogue of, 45, 

 spectrum observations of, 48. 

 treatise on double, 44. 

 U, W, and X Sagittarii, variable, 54. 

 Stas, 201, 



Stationary hydraulic eugine, 439. 

 Statistics of steam, 435. 



report of the Bureau of, 3SG. 

 Steam fog-whistles, 459, 

 statistics of, 435, 

 towage on canals, 445, 

 Steam-pipes, casing for, 435, 

 Stearns' duplex system, 168, 

 Stebnitzky, 6. 

 Stedman, J. R., 401. 



Steel brushes for cleaning iron castings, 

 498. 

 tempered, 51S. 

 compressed while fluid, 453, 

 experiments on, 202, 

 influence of foreign ingredients upon 

 the physical properties of, 202. 

 Steele, John A., 398. 

 Stein, 287. 



Stephanoceros on submerged plants, 339. 

 Stevenson, David, 123. 



Stevenson, James, 246. 

 Stewart, Prof, ^alfour, 8. 

 Stillman, 478. 

 Stipa, new species of, 352, 

 Stockholm Observatory, 36, 

 Stolba, Prof., 519. 



Stomach, nature of gases from the, 285. 

 Stone, Dr., 145. 

 E. G., 22. 

 E. J., 58. 

 Livingston, 401. 

 Stone-pine tree, use of, 365. 

 Storer, Prof. F. H., 196, 210, 372, 375, 376, 382. 

 Storey, 266. 

 Storm, James A., 310. 

 Storm of March 12, 1S76, 114. 

 Storms, eastward progress of, 124. 



Faye's theory of, 85, 86. 

 Stowe, 150. 



Straw, leather, and wicker-work, imita- 

 tion of, 430. 

 Street railways, a new rail for, 443. 

 Street-lamp and fire-hydrant combined, 



414. 

 Strohmeyer's process, 501. 

 Structure and development of mites, 332. 

 of the earth, interior, 121. 

 of young fishes, remarkable, 323. 

 Struve, Otto, 18, 33. 



formuliB of, 7, 

 Strychnine from brucine, 207. 

 Studnicke, Prof.,93. 



Substitute for bark in tanning, new, 507, 

 Suds from the washing of wool, use of, 498. 

 Sulpho-carbonates of alkalies, 380, 381. 

 Sulphur, a new oxide of, 211. 



as fire-extinguisher, 465. 

 in coal-gas, 418. 



compounds as conductors of elec- 

 tricity, 166. 

 Sulphuretted hydrogen, development of, 



196, 

 Sulphuric acid, ammonia in, 196. 

 Sun, an ancient eclipse of the, 10. 



spectroscopic diameter of the, 57. 

 relative temperature of various por- 

 tions of the, 13. 

 views of Secchi and Langley on the, 9, 

 Sun-spots and price of grain, 370. 

 Survey of the Territories, Bulletin, 302. 

 Swan, new star in the breast of the, 32. 

 Swedish arctic explorations to 1875, 241. 

 Sweeney, Dr. R.O., 400. 

 Swiss lake-dwellings, new hypothesis in 



regard to, 292. 

 Switzerland, standard time in, 41. 



T. 



Table for computing relative humidity, 



110. 

 Tacchini, Prof., 40, 

 Tait, 135, 359. 

 Tanning, new substitute for bark in, 507, 



process, rapid, 509. 

 Technology, 475. 



Telegraph-lines, underground, 464. 

 Telegraphy, duplex, 168, 169. 



East Indian, 170. 

 Telescope, the great Paris, 39, 

 Telescopes, large, 40. 



Temperature iii the great geyser of Ice- 

 land, 109. 

 observations in Italy, 128, 

 of solar spots, 12. 



