778 Index. | Oct., 
Solar Spots, Telescopic Appearance 
of, 222. 
Surface, Appearances of, 662. ~ 
Sorsy, Mr. H. C., on Metallic Meteor- 
ites. 747. 
Microscopic Examination of Rocks, 
691. 
on Photographing the Structure of 
Metals, 756. 
Structure of Blister Steel, 392. 
Spain, Minerals, Statistics of, 149. 
Spectra of certain Fixed Stars and 
Planets, 695. 
— of Chemical Elements, 342. 
—— of Gases and Vapours, 497. 
— of Heated Vapours, 593. 
of Heavenly Bodies, 741. 
Spectral Lines, Wave Lengths of, 158. 
Spectroscope, Cooke’s, 158. 
Spectrum Analysis, 379, 573. 
Explanation of the, 591. 
— of Blood, 500. 
— of Electric Light, 161. 
— of Lightning, 363. 
— of Phosphorus, 116. 
—— Solar, Telluric Rays in, 157. 
Spence, Mr., on Copper Smelting, 745. 
Spheeraphides, 113. 
Spider, Mimetic Resemblance to a 
Flower, 703. 
Spiders of Great Britain and Ireland, 
the, 725. 
Carpet produced by, 516. 
Spinal Cord, Photographs of, 685. 
Sponges, Bleaching of, 323. 
Spontaneous Generation, 704. 
Ignition of Iron in Oxygen, 348. 
Spring, Hot, Wheal Clifford, 744. 
Spruce, Mr, on the River Purus, 755. 
Stars, Causes of Scintillations of, 157. 
Spectra. of certain Fixed, 695, 
741. 
Steam Boilers, Mode of Preventing Ex- 
plosions of, 699, 
Cultivation, Value of, 309. 
—— Navigation, History.of, 237. 
its Rise, Progress, and Prospects, 
235. 
Power, New Plan of applying, for 
Agricultural Purposes, 658. 
Steamers, Comparative Dimensions of 
the Largest, 246. 
Steel Tubes, 341. 
Stellar Parallax, 108. 
SrenuouseE, Dr., on Munjeet, 299. 
Stereoscope, Swan’s, 159. 
Stewart, Baurour, M.A., on Radiant 
Light and Heat, 589. 
Stock, Improved Production of, 102. 
Stoppart, Mr. W., on a highly Fossili- 
ferous Limestone, 748. 
Sroxres, Professor, on the Discrimination 
of Organic Bodies by means of their 
Optical Properties, 696. 
on Chlorophyll, 301. ,. 
Stones, Black, which fell at Birming- 
ham, Analysis of, 746. 
Stratification of Electric Discharges, 
Picture of, 505. 
Strontium in the Bath Waters, 746. 
Struthious Birds, Systematic Relations 
of the, 357. 
Sruper, M., on Origin of Swiss Lakes, 
330. 
Submarine Telegraph Cables, the Con- 
struction of, &e., 624. 
Substitution Compounds, 288. 
Sugar and Fat, Relative Values of, as 
Food, 753. 
Sulphate of Lime, Action of, in Soils, 
ADS: 
Sulphur, Determination of, 322. 
Heonomizing, 745. 
Sulphuric Acid, Purification of, 322. 
Sun, Arrangements for Viewing the, 
— Constitution of, 447. 
—— Difference in Luminosity between 
the Centre and Edge of, 694. 
— Distance of, from the Earth, 105. 
—— Physical Aspect of the, 741. 
—— Photographs of the, 665. 
—— Photosphere of, 450. 
—— Period of Rotation, 230. 
Ring of Nebulous Matter round 
the, 449. 
-— Telescopic Appearance of Exter- 
nal Envelope and Spots of, 280. 
Spots, Connection with Terrestrial 
Magnetism, 299 
Swiss Lakes, Origin of, 330. 
i 
Telegraph, Oceanic, 36. 
Submarine, 757. 
Telescopes, Silvered Glass, 381. 
Telluric Rays in Solar Spectrum, 157. 
TrmpPreL, M., New Telescopic Comet, 
106. 
TENNENT, Sir J. H., The Story of the 
Guns (Review), 362. 
Thallassophryne Reticulata, on the 
Poison Apparatus of, 518. 
Thallium in Pyrolusite, 688. 
New Sources of, 458. 
Thermometer, Joule’s, 160. 
Thistles, Fertilization of, 111. 
Tuupicuum, Dr., on Pigmentary Mat- 
ters in Urine, 288. 
Tin, a New Ore of, 745. 
