194 



INDEX. 



Deville and Troost, iodine, 74. 

 Dewar and Liveing, carbon flutings, 

 75. 



series, law of, 86. 

 Dissociation and eTolution, 158. 



and spectral series, 83. 



and temperature, 36, 79. 



Berthelot, 23. 



calcium, temperature of, 105, 106. 



celestial, 25. 



Dumas, 27. 



early idea of, 22, 73. 



examples of, 158. 



objections, 144. 



of metals, 81. 



Ritter, 149. 



Sir William Crookes, 76. 



Sir William Roberts-Austen, 70. 

 Distribution of carbon stars, 129. 



stellar, 126. 

 Dbbereiner, 165. 

 Dumas, on dissociation, 27. 

 Duner, stellar classification, 129. 



Earhart, Zeeman effect, 112. 

 Eclipse, 1871, 43. 



1878, 43. 

 Eder, calcium, behaviour of, 106. 



and Valenta, mercury spectrum, 

 76. 



molecular combination, 74. 

 Eg-eroff, oxygen, 179. 

 Elements, chemical distribution in 



space, 142. 

 and temperature, 165. 



in hottest stars, 159. 



initial, 165, 166. 



series of, 87, 90. 



spectra of, 18, 19. 



without series, 93. 

 Embryology, 156. 

 Enhanced lines, 31. 



and chromosphere, 39. 



calcium, 37, 



in a Cygni, 48. 



in stars, 33. 



in sun, 35. 



iron, 34. 



lithium, 32. 



magnesium, 35. 



temperature ranges, 57. 

 Evolution, 152. 



and dissociation, 158. 



organic and inorganic, 172, 190. 



stellar evidence, 62. 



F. 



Faraday, magnetic perturbation of 

 lines, 109. 



Fievez, magnetic perturbation of lines, 



110. 

 Flutings, 10, 83. 



carbon, 75, 83. 



magnesium, 83. 

 Formulae for series, 87, 88. 

 Fractionation, 116. 

 Frankland and Kirchhoff's theory, 41 . 

 Fraunhofer lines, 15, 39, 42. 43. 



Gr. 



Gas, cleveite, composition of, 96. 

 G-ases, series in, 91. 



spectra of, 30. 



Gaug-es, star, Herschel, 126. 

 Genera, stellar, 70. 

 Geology, stratigraphical, 154. 

 Gould, Milky Way, 125. 

 Gravity, specific, of iodine, 74. 

 Groups, chemical, and series, 91. 



H. 



Haemoglobin, formula for, 172. 

 Hale, calcium, behaviour of, 105, 106. 

 Hasselberg-, hydrogen spectrum, ]82. 

 Helium and Fraunhofer lines, 39, 48. 



distribution in space, 142. 



series, number of, 95. 

 Hemsalech, artificial shifts, 107. 

 Herschel, Sir John, star-way, 126. 

 Herschel, Sir William, and nebulae, 143. 



milky way, 125. 



Hittorf and Pliicker, spectra of ele- 

 ments, 19. 

 Howes, Prof., 170. 

 Hug-gins, spectrum of Arcturus, 150. 



spectra of nebula;, 121. 

 Humphreys and Mohler, pressure and 



wave-length, 101, 105. 

 Humphreys, behaviour of strontium, 



106. 



Hydrocarbons, series of, 175, 183. 

 Hydrogren, behaviour of, in stars, 64. 



complexity of, 95. 



distribution in space, 142. 



ion, 189. 



primary element, 165. 



proto-, 58, 81. 



series of, 31, 59, 86, 87, 95, 98, 179, 

 182. 



structure, spectrum of, 31. 



I. 



Iodine, specific gravity, 74. 



Ions, electric charge, 110, 114, 185, 190. 



hydrogen, 189. 



theory of, 190. 



Zeeman effect, 188. 



