  Adamas, unmistakable double in 1903, 214. Aeria, white in, 76; ruddy color of, 148. Air (see Atmosphere), 86; necessity of, to life, 166, 167; as important to astronomical calculations, 7. Air-waves, 250, 251, 273. Albedo, low, 162, 167. AlgÆ, 349. Amenthes, hibernation of, 317-324. Animalcula, in almost boiling geysers, 349. Aonium Sinus, two doubles suspected in, 242. Aquae Calidae, 208, 253, 315. ArchÆan age of the earth, 132, 133, 138. Areography, 20-31; beginning and progress of, 109; three periods in, 24. Arizona, 16; in desert belt, 13; plateau of, 18. Arnon, convergent double, 240. Artificiality, of canal system, 366, 368, 369, 370, 374; of oases, 366, 371. Ascraeus Lucus, 331; embraced by the double Gigas, 257. Astaboras, connection with Lucus Ismenius, 260-263. Atmosphere, of Mars, 62, 63, 71, 78, 79, 87; shown to exist, 80, 82, 83, 84, 163, 167; rare, 85, 86, 162, 167; effect on temperature, 80; constituents of, 162, 164, 166, 168. Autumn, length of Martian, in northern hemisphere,
m.html#Page_163" class="pginternal">163, 164; Climate, 82-89; one of extremes, 87; temperature, theoretic and observed, 87; non-glaciation the rule, 88. none over blue-green areas, 92; of tawny dust color, 106; probably dust storms, 165; prove existence of atmosphere, 167. Crystals, conditions of formation, 357. Winds, 154. A COMPENDIUM OF SPHERICAL ASTRONOMY With its applications to the determination and reduction of positions of the fixed stars By SIMON NEWCOMB Cloth8vo$3.00 net CONTENTS PART I. PRELIMINARY SUBJECTS Chapter I. Introductory. Notes and References. Chapter II. Differences, Interpolation, and Development. Notes and References. Chapter III. The Method of Least Squares. Section I. Mean Values of Quantities. II. Determination of Probable Errors. III. Equations of Condition. Notes and References. PART II. THE FUNDAMENTAL PRINCIPLES OF SPHERICAL ASTRONOMY Chapter IV. Spherical CoÖrdinates. Section I. General Theory. II. Problems and Applications of the Theory of Spherical CoÖrdinates. Chapter V. The Measure of Time and Related Problems. Section I. Solar and Sidereal Time. II. The General Measure of Time. III. Problems Involving Time. Chapter VI. Parallax and Related Subjects. Section I. Figure and Dimensions of the Earth. II. Parallax and Semi-diameter. Chapter VII. Aberration. Chapter VIII. Astronomical Refraction. Section I. The Atmosphere as a Refracting Medium. II. Elementary Exposition of Atmospheric Refraction. III. General Investigation of Astronomical Refraction. Notes and References to Refraction. Chapter IX. Precession and Nutation. Section I. Laws of the Precessional Motion. II. Relative Positions of the Equator and Equinox at Widely Separated Epochs. III. Nutation. Notes and References to Precession and Nutation. PART III. REDUCTION AND DETERMINATION OF POSITIONS OF THE FIXED STARS Chapter X. Reduction of Mean Places of the Fixed Stars from one Epoch To Another. Section I. The Proper Motions of the Stars. II. Trigonometric Reduction for Precession. III. Development of the CoÖrdinates in the Powers of the Time. NOTES AND REFERENCES. Chapter XI. Reduction to Apparent Place. Section I. Reduction to Terms of the First Order. II. Rigorous Reduction for Close Polar Stars. III. Practical Methods of Reduction. IV. Construction of Tables of the Apparent Places of Fundamental Stars. Notes and References. Chapter XII. Method of Determining the Positions of Stars by Meridian Observations. Section I. Method of Determining Right Ascensions. II. The Determination of Declinations. Chapter XIII. Methods of Deriving the Positions and Proper Motions of the Stars from Published Results of Observations. Section I. Historical Review. II. Reduction of Catalogue Positions of Stars to a Homogeneous System. III. Methods of Combining Star Catalogues. NOTES AND REFERENCES List of Independent Star Catalogues. Catalogues made at Northern Observatories. Catalogues made at Tropical and Southern Observatories. APPENDIX Explanation of the Tables of the Appendix.—I. Constants and FormulÆ in Frequent Use. II. Tables Relating to Time and Arguments for Star Reductions. III. Centennial Rates of the Precessional Motions. IV. Tables and FormulÆ for the Trigonometric Reduction of Mean Places of Stars. V. Reduction of the Struve-Peters Precessions to the Adopted Values. VI. Conversion of Longitude and Latitude into R. A. and Dec. VII. Refractions. VIII. Coefficients of Solar and Lunar Nutation. IX. Three-place Logarithms and Trigonometrical Functions. THE MACMILLAN COMPANY, 64-66 Fifth Avenue, New York |
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