INDEX. 



451 



Doppler's analogies from sound, 133 

 Draper's tithonographic representa- 

 tion of solar spectrum, 48 

 Dumas' s remarks on elements, 205 



E. 



Earth, chemical nature of sun con- 

 trasted with, 58, 171 

 Eclipses, artifical, first applied, 107 

 at minimum, 438, 440 

 conditions of observation during, 



356 



spectroscopic observations, 355 

 1836, observations on, Forbes, 45 

 1867, 441 



1868 ; Herschel's observations, 117 

 1871, Maclear's and Lockyer's ob- 

 servations, 166, 443 

 1878, 438, 441 

 1882, quotation on, 359, 443 

 1886, observations on, 364, 443 

 Elements, Berthelot's views on, 204 

 Brodie's views on, 207 

 Dumas's views on, 205 

 Lavoisier's views on, 59 

 Clerk-Maxwell's views on, 267 

 chemical ideas of, 59 

 comparison of lines of, with 



Fraunhofer lines, 177 

 dissociation of, Hunt, 206 

 in solar atmosphere, order of, 172 

 opinions on the so-called, 266 

 present in sun, 77, 78, 93, 158, 179 

 list of, in Aldebran, Huggins, and 



Miller, 187 

 solar, Angstrom's, Kirchhoff s, and 



Thalen's results, 93 

 siiggested method of formation of, 



245 



Ether, the, 3 

 Ethyl compounds, 272 

 "En Echelon," arrangement of lines 



in arc, 386, 388 



Electricity, first employed extensively 

 for spectroscopic work, Wheats tone, 

 73 



Exchanges, theory of, 56 

 Extension, equatorial, 438, 441 



P. 



Fabricius, 1 



Faculse, brightest parts of sun, 95, 



420, 422 



less absorption than spots, 105 

 magnitudes of, 96 

 positions of, 105 



Faraday's researches on gold, 279 

 Faye's theory of sun-spots, 100 ; rota- 

 tion, 427 

 resting:, work with Abney on organic 



radicals, 271 



Fizeau's researches on light, 135 

 Flames, coloured, 30 

 Flame of arc, 380-383 ; and core com- 

 pared, 386 

 phenomena, 386 



Flutings in spectra, 274 ; new, 278 

 of sodium, 294 

 vanishing into lines, 293 

 Fog, Atlantic, 413 

 Forbes' s statement about the sun's 



atmosphere, 46 

 suggestion for observing sun-spot 



spectra, 98 

 work on sun, 44 

 Forms of prominences, method of 



viewing, 112. See Prominences. 

 Foucault's experiments with sodium, 



50 

 Frankland's researches on gaseous 



spectra, 131 



spectrum of lithium, 197, 242 

 and Lockyer's experiments on 



magnesium, 148 

 and Lockyer's modification of 



KirchhotFs solar theory, 165 

 and Lockyer's observation on line 



absorption, 378 

 Fraunhofer, held that dark lines 



due to action at the sun, 44 

 bright line phenomena, 32 

 experiments on light produced by 



electricity, 21 

 experiment on the origin of lines 



in solar spectrum, 19 

 first used telescope in spectroscope, 



25 



founded comparative stellar chem- 

 istry, 186 



improvement in spectroscope, 13 

 lines, first named, 13 

 new idea of, 156 

 of principal allocation by 



Angstrom, 88 

 origin of, 18 

 truly solar, 42 



G. 



Galileo, 1 



Gladstone's experiments on electric 

 spectra, 147 ; light of light- 

 houses, 65 

 remarks en electric spectra, 147 



