4 28
INDEX.
May 17th, 1882. 28; duration of, 88,90 ; frequency of, 89; next in England,88 ; upon Jupiter , 341 ; number in anyyear. 89 ; phenomena visible in, 48.
Ecliptic , the plane of the, 124.
Electrical phenomena upon the Sun , 30.
Elements, chemical, dissociation of, 2(5.
Ellipse, description of an, 11
Ellis. Mr., the Earth ’s magnetism, andSun -spots, 38.
Encke. perturbations of minor planets,285; the solar parallax, 13.
Engelmann. Prof., observations of Jupi ter ’s satellites. 340; their sizes, 320.
Equator .diminution of gravity at the, 205.
Faculse, solar, 21. 35.
Feasts, fixed and movable, 95.
Fisher, Rev. O.. physics of Earth ’s crust.219.
Flammarion, M., the satellites of Jupiter ,346.
Forbes, Prof., on comets and ultra-Nep-tunean planets. 416.
Foucault’s pendulum, 199.
Frigga. variability in light of, 279.
Galileo . Galilei , name of, 302: Jupiter ’sbelts, 302; his “ Sidereal Messenger, ”321: perceives Saturn ’s ring, 360 ; his jtelescopes, 325 ; discovers the satellitesof Jupiter , 321 ; his diagrams of them,322 : their light, 345; their periods,323': the phases of Venus , 170, 324.
Galle, Dr., sees Saturn ’s ring C, 308.
Gill, Mr., the Sun ’s distance by obser-vations of Mars , 17.
Glacial epochs, 187.
GledhillMr., observations of Jupiter , 309.
Granules, solar, 42.
Gravity, diminution of, at the equator,205. H ’
Green, Mr. N. E., chart and views of iMars , 239.
Greenwich observations of the Earth ’smagnetism, 38.
Gresham. College, Foster, Samuel, Pro-fessor in, 4 ; Hooke, Dr., Professor in,
93; the aberration of light, 93; ex-periments with falling balls, 198; ob-servations of Mars , 236; rotation ofJupiter , 311; minor planets, lectureupon at, 267 ; nautical astronomy in,
93 ; observatory of, 93.
Gwilliam, Mr., transit of satellite andshadow over the Great Red Spot on .Jupiter , 317.
Hall, Professor Asaph, discovers thesatellites of Mars , 249; rotation ofSaturn , 355.
Harmonia, minor planet, 275.
Harmony, the celestial, 116.
Heat of the Earth , internal, increaseof. 218.
Helium, 34.
Herschel, Sir iVm, life of by Prof. :Holden, 395 ; rotation of Jupiter , 312 ; ^size of Jupiter ’s satellites, 326 ; obser- <
rations of their light, 345 ; of Saturn ,355 ; of its rings, 368. 372: his theoryof Sun -spots, 21: discovers Uranus ,393; and two of its satellites, 399.
Herschel, Sir. J.,perturbations of Uranus ,411.
Hilda, minor planet, orbit of, 267 ; longperiod of. 276.
Hirst, Mr G.D.. drawings of Jupiter , 304;observation of satellites shadow, 344.
Holden, Prof., life of Sir \V. Herschel, 395.
Homer, references to Venus , 106 ; namesfor moons of Mars from, 251.
Hooke, Dr., Professor in Gresham College ,experiments with falling balls, 198;observations of y Draconis, 93; of Mars ,236; of Jupiter , 311.
Horizon, rational and sensible, 179.
Hornstein, Herr, sizes of minor planets,280 .
Horrox, Jeremiah, 4.
Hough. Prof., observations of Jupiter ,308, 312, 317.
Huggins, Dr., observation of a solarprominence. 30: spectra of Mars andof the Moon , 237 ; transit of Mercury.151.
Huj-ghens, on Saturn ’s ring, 367; hi?“ Systema Saturnium,” 367.
Hyginus , the lunar crater , 78.
Inclination of the plane of an orbit, 126,274 ; of orbits of minor planets, 274.
Inferior planets, greatest elongation of,125.
Intra-Mercurial planets,when likely to beseen,139; supposed observations of, 139.
Irene, minor planet, long period of, 276.
Iron , lines iu spectrum of, 27.
Janssen, M., daylight observations ofsolar prominences, 29; photographs ofthe Sun , 41.
Juqo, the minor planet, colour of itslight, 278; discovery of, 269 ; distanceof. 267; found by Olbers ’ hypothesis,284 ; observation of by Mr. Lassell,278; size of, 278; the Sun ’s distancefound by, 292.
Jupiter , attraction of, compared with theSun 's, 422 : belts of, 3U2 ; their colours,
308 ; not seen b}* Galileo , 302; centreof gravity of,and of the Sun , 298; cycleand epicycle of, 110 ; Dearborn Obser-?vatory, observations of, 308, 312, 317;density of, 295; diameter of, 297 ; dis-tance of, 298; drawings of, by Conder,
309 ; De la Rue, 304; by Gledhill,309; Hirst, G. D., 304 ; Pritchett, 306 ;Terby, 310 ; Trouvelot , 307 ; Various,305; early observation of, 302; gravityon, 296; gravity diminished on equa-tor, of 319 ; habitability of, 318, 319 ;heat of, 295, 353; oblateness of, 297;orbit apparent of, 102,112 ; inclinationof, 299 ; oral markings on, 305; periodof, in orbit, 299; perturbations of minorplanets by, 289; physical conditionof, 295, 313; polar flattening of, 297;