14 



Movement, Orbital, of three or 



more Bodies . . . . . . 1200 



of two Bodies . . 1110 



Multiple Stars . . . . 7510, 7520 



Multifile Systems, Spectroscopic 8600 



Museums 0060 



Nebula; 7800 



Spectroscopy of . , . . 8200 



Neptune .. '. 6300 



Satellites of 6580 



— — Spectrum of . . 6300, 6820 



Nomenclature .. .. .. 0070 



Nutation, Determination of Con- 

 stant of 3320 



Nutation of the Earth . . . . 1710 



Objective G-rating . . . . 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 2010 



Orbits, Calculation oi . . 1120, 1820 



Correction of . . . . 1160 



Stellar, from Spectroscopic 



Observations 8G20 



Parallax 0220 



Annual, Correction for . . 0270 



of Fixed Stars . . . . 7070 



Solar 4050 



Stellar, from Spectroscopic 



Observations 8630 



Pedagogy 0050 



Pendulum Observations. . .. 5100 



Periodicals 0020 



Perturbations, Greneral . . . . 1250 



Special .. .. .. 1590 



Phases of the Moon ,. o. 4850 



Philosophy 0000 



Photographic Plate Holders . . 2120 



Photographs of Moon . . . . 4890 



Stellar Spectra . . 8450 



Photographs of Sun .. .. 43G0 



Photometry 2400 



Piers 2020 



Planetary Theory . . . . 1250 



Planets, Figure of . . . . Hi 40 



Orbits of 1130 



Spectroscopy of . . . , 6820 



Polarization Apparatus .. .. 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 2210 



Radiation Constant of the Sun . . 4200 



Radiometry . . . . . . 2500 



Reflectors and Refractors, Com- 

 parison of . . . . . . 2040 



Retraction 0210 



Refra(!hors, Photographic 2040, 2050 



Visual . . . . 2040, 2050 



Rising 0150 



Rotating Masses of Fluid, Figures 



ot Equilibrium of . . . . 1600 

 Rotation of Sun, Determination 



of, by Spectroscopy . . . . 4640 



Rot it ion. Perturbed .. .. 1700 



Satellites, Figure of . . . , 1660 



Theory of 1450 



Saturn 6100 



Satellites, and Ring System 



of G560 



Spectrum of . . 6100, 6820 



Theory of Ring System and 



Srtl-llitesof 1460 



Scintdlation .. .. .. 5400 



Screens . . . . . , . . 2120 



Setting 0150 



Shadow Track of Solar Eclipses, 



Map of 4220 



Shdoting Stars 6650 



Societies, Reports of . . . . 0020 

 Solar Processes, Connection of, 



with Terrestrial Phenomena. . 4110 



Solar Systems, Constitution of . 1770 



Solar System, Description of .. 4000 



Motion of in Space . . 1840 



Origin, Stability, and 



Development of . . . . 1790 



Theory of . . . . 1100 



Spectra, Peculiar Stellar.. .. 8400 



Pnotographio, Micrometer 



for 2260 



Production of Comparison 2250 



Stellar, Distribution of in 



the Heavens 8140 



Spectra, Stellar, Study of Special 



Types of 8120 



Spectrographs . . . . . . 2220 



Spectroheliograp 1 .. .. 2270 



S))»ctropliotometry . . . . 2400 



Speclroscopes .. .. .. 2220 



Spectroscopic Apparatus 2200, 2250 

 'iheory and Adjust- 

 ment of 2280 



Spectroscopic Observations, Cor- 

 recting Lenses for .. .. 2250 



• - — ■ Physical Constitution 



of the Sun deduced from . . 4750 

 Spi ciroscopic Researches of Sun 



ill Eclipse 4650 



of Surface of the Sun 



without Eclipse .. .. 4600 



Spectroscopy of Clusters .. 8200 



