14 



Movement, Orbital, of three or 



more Bodies . . . . . . 1200 



of two Bodies . . 1110 



Multiple Stars . . . . 7510, 7520 



Multiple Systems, Spectroscopic 8600 



Museums 0060 



Xebulffi 7800 



Spectroscopy of . . . . 8200 



Xeptune .. '. 6300 



Satellites of 6580 



Spectrum of . . G300, 6820 



Nomenclaf ure . . . . . . 0070 



Nutation, Determination of Con- 

 stant of 3320 



Nutation of the Earth . . . . 1710 



Objective Grating . . . . 2210 



Prism 2210 



Objectives 2040 



Observations, Reduction and Rec- 

 tification of . . . . 3000, 3240 

 Observatories . . . . 2000, 2010 

 Observatory Buildings . . . . 2020 



Occultation 0350 



by the Moon . . . . 4870 



Oceans of the Earth, Figure of. . 1610 



Optical Matters 2040 



Orbits, Calculation of . . 1120, 1820 

 Correction of . . . . 1160 



Stellar, from Spectroscopic 



Observations 8620 



Parallax 0220 



Annual, Correction for . . 0270 



of Eixed Stars . . . . 7070 



Solar 4050 



Stellar, from Spectroscopic 



Observations 8630 



Pedagogy 0050 



Pendulum Observations. . . . 5100 



Periodicals 0020 



Perturbations, General . . . . 1250 



Special 1590 



Phases of the Moon . . . . 4850 



Philosophy 0000 



Photographic Plate Holders . . 2120 



Photographs of Moon .. .. 4890 



Stellar Spectra . . 8450 



Photographs of Sun . . . . 4360 



Photometry 2400 



Piers 2020 



Planetary Theorv •• •• 1250 



Planets, Figure of . . . . 1640 



Orbits of 1130 



Spectroscoijy of . . . . 6820 



Polarization Appai-atus . . . . 2300 

 Poles, Movement of on the Sur- 

 face of the Earth . . . . 1720 



Precession, Correction for . . 0260 



Determination of Constant 



of 3320 



of the Earth . . . . 1710 



Prism Combinations . . . . 2240 



Prism, Objective . . 



Radiation Constant of the Sun . . 



Radiometry 



Reflectors and Refractors, Com- 

 parison of 



Refraction 



Refractors, Photographic 2040, 



Visual . . . . 2040, 



Rising 



Rotating Masses of Fluid, Figures 

 of Equilibrium of 



Rotation of Sun, Determination 

 of, by Spectroscopy . . 



Rotation, Perturbed 



Satellites, Figure of 



Theory of . . 



Saturn 



Satellites, and Ring Svstem 



of ' .. 



Spectrum of . . 6100, 



Theory of Ring System aixl 



Satellites of . . . . . . 



Scintillation 



Screens 



Setting 



Shadow Track of Solar Eclipses, 

 Map of 



Shooting Stars 



Societies, Reports of 



Solar Processes, Connection of, 

 with Terrestrial Phenomena . . 



Solar Systems, Constitution of . 



Solar System, Description of . . 



Motion of in Space . . 



Origin, Stability, and 



Development of 



Theory of 



Spectra, Peculiar Stellar.. 



Photographic, Micrometer 



for 



Production of Comparison 



Stellar, Distribution of in 



the Heavens . . 



Spectra, Stellar, Study of Special 

 Types of 



Spectrographs 



Spectroheliograph 



Spectrophotometry 



Spectroscopes 



Spectroscopic Apparatus 2200, 



Theory and Adjust- 

 ment of . . 



Spectroscopic Observations, Cor- 

 recting Lenses for 



Physical Constitution 



of the Sun deduced from 



Sj^ectroscopic Researches of Sun 

 in Eclipse 



of Surface of the Sun 



without Eclipse 



Spectroscopy of Clusters 



2210 

 4200 

 2500 



2040 

 0210 

 2050 

 2050 

 0150 



1600 



4640 

 1700 

 1060 

 1450 

 0100 



6560 



1460 

 5400 

 2120 

 0150 



4220 

 0650 

 0O2O 



4110 

 1770 

 4000 

 1840 



1790 

 1100 

 8400 



2260 

 2250 



8140 



8120 

 2220 

 2270 

 2400 

 2220 

 2250 



2250 



4750 



4650 



4600 

 8200 



