430

INDEX.

the crater, 78; lunar librations, (57;light streaks, 74 ; Linn6, the crater, 78; 'longitude by, 98; maps of, 78; itsmountains, 70; nodes of orbit of, 85 ;orbit of, 58, (52; phases of, (58 ; a planet,

(52 ; photographs of, 81; rills upon, 78 ;rotation of, 0(5; Mr. Rutherfurd’s photo-graph of, 68, 72; seas, so-called, of, 72 ;secular acceleration of, 225; size of, 52; jstereographs of, 81: surface, how much Iseen, (58; temperature of surface of, ;80 ; tidal power of, 55 ; tides, benefits !of, 92 ; variations in distance of, 51 • Ivelocity of, 57 ; volcanic action on, 77;the weather, its relation to, 9(5 ; weightof, methods of determining, 58. etc.; ]zenith, seen in the, 90. .

Nasmyth. Mr., model of the lunar moun-tain Copernicus , 71.

Newton . Mr. F. M., occupation of the ;shadow of a satellite of Jupiter , 844. i

Newton , Sir I., the spectrum of light, 22;the Earth ’s density, 208.

Nisten, M., on minor planets, 2(57 ; their .orbits, 290.

Nodes, of the Moon ’s orbit, 85.

Neptune , Bode’s law, and, 414 ; densityof, 415; discovery of, 409; distanceof, 414; gravity upon, 415; periheliaof its orbit, 418; perturbations of,418 ; perturbations of Uranus by, 410;seen by Dr. Galle, and at Cambridge,412; observations of, in 1795, 418;satellite of, 415; size of, 414, 415;solar heat and light on, 415; speed of,414; ultra-Neptunean planets, 415,41(5.

Olbers , the hypothesis of, 282.'

Orbits, of the planets, 117, 118 ; of theminor planets, 290, etc. (see alsoMercury , Venus , etc.)

Palisa, Dr. J., discoverer of many minorplanets, 270; rediscovers Hilda, 278.

Pallas, the minor planet, colour of lightof, 278 ; discovery of, 269 ; distance of,2(57 ; size of, 278.

Parallax, solar, 4, etc.

Pendulum , experiments in Horton Col-

• liery, 217 ; Foucault’s, 199.

Perigee, the Sun when in, 228.

Periods, orbital, of the planets, 117;synodic, 129.

Peters, Prof., numerous discoveries ofminor planets by, 270; on intra-Mercurial planets, 141.

Phases, of an inferior planet, 127 • of theMoon , (58; of Venus , 59; half-moonphase of Venus , 1(54; phases of Mars , 242.

Phobos , satellite of Mars , 251.

Photographs, of the Sun , 41; of theMoon , 68, 81.

Photosphere, of the Sun , 22.

Pickering, Prof., diameters of minorplanets, 278 ; photometry of satellitesof Mars , 251.

Pierce, Prof. B., on Saturn ’s rings, 873.

Planets, attractions of, upon the Earth ,421, 422 ; Bode’s law of distances of,

123; conjunctions of, with the Sun, .125, 417 ; distances of, 117 ; eccentrici-ties of orbits of, 119; elongations,greatest, of, 129 ; inclinations of orbitsof, 12(5, 274 ; intra-Mercurial, 139;.orbits of, 118; paths, apparent, of, 100;perihelion passages of, 417; theirpossible effects, 417, etc.; their posi-tions and dates, 419 ; periods of inorbits, 117 ; phases of, 127, 159 1(54,242 ; retrogression and stations of, 102,.130 ; sizes of, 425, 42(5; synodic periodsof, 129; ultra-Neptunean, 415, 41(5;velocities of, 117.

Planets, miuor, discoverers of, 2(59, 270,271; distances of, 2(57, 275, 289. 290 ;eccentricities and inclinations of orbitsof, 273, 274 ; Jupiter ’s perturbationsof, 289; Jupiter weighed by, 292;light, comparative, of, 271; meteoricmatter and origin of, 288; names,curious, of, 271 : the nearest to theEarth , 275; orbits of, 12, 290 ; nearcoincidences of, 277 ; origin of, pos-sibly by a collision, 28(5 ; origin of andthe nebular hypothesis, 287 ; Olbers 'theory, 281, 283; periods of, 27(5;possible beyond Jupiter , 288 ; redis-cover}* of, 272 ; uses of, 291 ; and thesatellites of Mars , 252, 298; sizes of,277 ; Sun ’s distance found by, 291 ;variability of light of, 279 : weight of,aggregate. 270 ; zone of, 2(58.

Planetoid, the name, 2(5(5 (see Planets ,Minor).

Pole, celestial, altitude of, 180; defini-tion of, 177; position, apparent, of, 178.

Polyhymnia , the minor planet, 273.

Pritcliett, Prof., drawing of Jupiter , 306.

Primum Mobile, the, 11(5.

Proctor, Mr., map of Mars , 239 ; rotationof Mars,23 (5; hiswork upon Saturn , 366..

Prominences, solar {see The Sun ).

Repulsive force in the Sun , 44.

Retrogression of planets, 102, 130, 136.

Right ascension, 134.

Rills, lunar, 73.

Romer, the velocity of light, 348.

Rosse, Lord, the temperature of theMoon ’s surface, 80.

Rotation of the Earth , proofs of, 197.

Russell, Mr. H. C., observations of Jupi­ ter , 309.

Rutherfurd, Mr., lunar photographs by,.68, 72.

Sandwich Isles, great crater in, 76.

Sappho , the minor planet, 292.

Saturn , belts upon, 354 ; cycle andepicycles of, 110; distance of, 356;.drawings of, 358,869, 370, 371 ; obser-vations of, by the Balls, 867 ; by Bond,368 ; Cassini, 367 ; Dawes, 3(58 ; Galle,.3(58 ; Hall, 355; Herschel, 355, 368 ;Huyghens , 367 ; Lassell, 3(58 ; orbit of,.356 ; path of, seen from the Earth , 102 ;phases of rings of, 357,359, etc.; polarcompression of, 355; position of, fa--