h 9 - 108486 +26° 2352 6.57 - 7 - 104321 Vir 4.57 2.2 5 - 222345 Aqr 5.16 4.6 x - 9 14690 70 Cet 5.62 4.3 x 7 ? 189849 15 Vul 4.74 3.3 x s x 9 6 28546 81 Tau 5.49 5.7 x 9 9 40536 2 Mon 5.10 4.0 x h? 7 7 15089 Cas 4.59 0.5 x 12 9 91312 Gr 1658 4.85 5.6 x s x 5 6 159560 Dra 4.95 6.0 8 - 90277 30 Lmi 4.85 5.0 x 9 9 57749 86 5.83 2.3 x 9 6 92787 135 5.28 7.6 x s 9 6 112429 8 Dra 5.27 3.0 x 7 7 28485 80 Tau 5.70 5.8 h 6 5 28677 85 Tau 6.04 - - 7 - [Pg 211] SUBJECT INDEX , Class 166 classification 168 metallic lines and band absorption 167 peculiar 172 observational material 208 Abnormal abundance, effect on spectrum 172 Abnormal conditions, effect on spectrum 171 Absent elements 86 Absolute magnitudes for Draper classes 197 Absorbing efficiencies of atoms 136 Absorption coefficient 110 Absorption lines 11, 50 Abundance of atomic species, 135, 177, 183 Abundance of atoms, terrestrial 5 Aluminum 68, 122 Arc spectrum 13 Atomic life 21, 110 life, astrophysical 22, 158 nucleus 4 number 5 states, probabilities of 23 weights 5 Azimuthal quantum number 8, 204 Balmer lines in stars 166 lines, maximum 166 series limit 42 Barium 85, 126 Blackness of continuous background 49 Blending of lines 171 Bohr’s Table 9 Boundary temperature 27 Calcium 70, 122 Carbon 59, 121, 207 compounds 61 spectroscopic and chemical valencies 11 Central intensities of spectrum lines 51 Central temperature 27 Chemical symbols 5 Chemical valency 10 Chromium 77, 124 Chromosphere 35, 47, 159 Classification, meaning of 190 Classification, principles of 191 Cobalt 80 Color indices of stars 49 Conductivities of flames 112 Consistency of temperature scale 130 Continuous background of stellar spectrum 46, 48 Copper 80 Critical potential 14 Critical potential, astrophysical determination 156 c-stars 173 Definitions, index to 203 Density and radius of second type stars 36 Displacement rule 13, 20 Draper classes, homogeneity 193 Draper system 191 Duration of atomic states 21 Earth, composition of crust 185 origin of 185 total, composition of 187 Effective level 28, 136 Effective temperature 27 Effective temperature, Draper classes 197 Effect of conditions on spectrum 24 Electrons, extra-nuclear 8 Electron transfer 11 Elements 5 Elements, in stellar atmospheres 55 Emission lines, production of 11, 53 Emission lines, stars showing 53 Energy distribution in solar spectrum 49 Energy distribution in stellar spectrum 49 Equivalent outer orbits, electronic 10 Even number rule 177 Excitation 11 Excitation potential 15 [Pg 212] Flash spectrum 40, 53 Formulae in theory of ionization 106 Fractional concentration 105 Furnace experiments 112 Galactic concentrations of Draper classes 197 Gallium 81 Gaseous nebulae, continuous spectrum 49 Giant and dwarf spectra 195 Giant and dwarf temperature differences 31 Helium 58, 121 Hot spark 18 Hydrogen, atom 12