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]
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]
continuous spectrum [57]
energy levels [13]
line intensities [121]
peculiar behavior [56]
secondary spectrum [56]
stellar spectra [55]
Inner quantum number [204]
Ionization [11], [15], [97]
as criterion of pressure [44]
potential [15]
" and atomic number [20]
" astrophysical [156]
" and temperature of
maximum [157]
temperature [30]
temperature scale [33], [132], [133]
Ionized atom, lines of [101]
Intensity of lines [23], [116]
accuracy [118]
estimation [117]
observational material [116]
Intensity scales [117]
Interior of star, ionization in [18]
Iron [79], [125]
Isotopes [5]
Law of Mass Action [105], [110]
Lead [86]
Level of origin of lines [134]
Life of atom [21]
Life of atom, astrophysical [22], [158]
Limit of Balmer series [42]
Line intensity, data on [121]
notes on [127]
unknown lines [207]
Lines of unknown origin [55]
Lithium [59]
Low temperature conditions, stellar
atmosphere [94]
Magnesium [67], [122]
Magnesium, compounds [67]
Manganese [78], [124]
Marginal appearance [105], [135], [179]
Marginal appearance, observational
data [181]
Mass numbers of isotopes [5]
Maximum of lines [106]
Meteorites, composition [187]
Molecule, ionization of [19]
Molybdenum [84]
Nickel [80]
Niobium [84]
Nitrogen [63], [207]
Nucleus, atomic [4]
, Class [162]
Occurrence of elements in stars [5]
Optical depth [27], [35]
Origin of line spectra [11]
Orion nebula, continuous spectrum [49]
Oxygen [65], [207]
Oxygen, compounds [66]
Palladium [84]
Partial electron pressure [109]
Partition function [107]
Percentage of stars in Draper classes [197]
Photosphere [35], [47]
Photoelectric ionization [159]
Physical constants, astrophysical
evaluation [155]
Physical constants, required by
ionization theory [108]
Potassium [70]
Pressure, atmospheres of stars [25], [34]
from Balmer series limit [44]
from flash spectrum [40]
from ionization theory [45]
from line sharpness [38]
from line width [39]
from radiative equilibrium [40]
shift of lines [26], [38]
summary [45]
gradient in outer layers of star [34]
Quantum number [8]
Quantum relation [11]
Radiative equilibrium in outer layers
of star [40]
Radium [86]
Radius and density of second type
stars [36]
Rare earths [85]
Relative abundance of atoms,
estimation [183]
abundance of atoms in stellar
atmosphere [177]
intensities of spectrum lines [23]
Reorganization time, see [atomic life]
Residual intensity [51]
Reversing layer [50]
Reversing layer, mass and
dimensions [47]
Rhodium [84]
Rubidium [81]
Ruthenium [84]
Rydberg constant [14], [155], [204]
Saturation [52], [135]
Scandium [72], [123]
Series notation [55]
Silicon [24], [68], [122]
Silicon stars [169]
Silver [84]
Sodium [67]
Sodium atom [8]
Solar atmosphere [47]
energy distribution [49]
intensities [113]
Space numbers for Draper classes [197]
Spark spectrum [14]
Special problems in stellar
atmospheres [161]
[Spectroscopic] valency electrons [10]
Stark effect [26]
Stars used for intensity estimates [119]
Stellar atmosphere compared with
earth’s crust [184]
Stellar reversing layer [91]
Strontium [81], [126]
Strontium stars [169]
Structure of absorption line [180]
Subordinate lines [12]
Subordinate series [99]
Sulphur [70], [207]
Surface gravity [35], [36]
Symmetry number, see [spectroscopic]
valency electrons
Temperature class [24], [112]
scale [28], [33]
scale, ionization [33], [133]
bright stars [31]
giant and dwarf [31]
Theory of solution [110]
Tin [85]
Titanium [72], [123]
Titanium compounds [75]
Total pressure in stellar atmospheres [110]
Total quantum number [8]
Typical giant star [41]
Ultimate lines [11], [94], [111]
Uniformity of stellar atmospheres [178]
Valency, chemical [10]
Valency, spectroscopic [10]
Vanadium [75], [124]
Weights of atomic states [107]
Width of lines [39]
Wings [51]
Wolf-Rayet stars [164]
absorption in [164]
continuous spectrum [49]
Yttrium [82], [129]
Zeemann effect [25]
Zinc [80], [126]
Zirconium [83]