CONTENTS.

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Sir Norman Lockyer
BOOK I.
THE PRE-TELESCOPIC AGE.
CHAP. PAGE
I.— The Dawn of Stargazing 1
II.— The First Instruments 16
III.— Hipparchus and Ptolemy 25
IV.— Tycho Brahe 37
BOOK II.
THE TELESCOPE.
V.— The Refraction of Light 55
VI.— The Refractor 73
VII.— The Reflection of Light 90
VIII.— The Reflector 100
IX.— Eyepieces 109
X.— Production of Lenses and Specula 117
XI.— The “Optick Tube” 139
XII.— The Modern Telescope 152
BOOK III.
TIME AND SPACE MEASURERS.
XIII.— The Clock and Chronometer 175
XIV.— Circle Reading 211
XV.— The Micrometer 218
BOOK IV.
MODERN MERIDIONAL OBSERVATIONS.
XVI.— The Transit Circle 233
XVII.— The Transit Clock and Chronograph 253
XVIII.— “Greenwich Time,” and the Use Made of It 271
XIX.— Other Instruments Used in Astronomy of Precision 284
BOOK V.
THE EQUATORIAL.
XX.— Various Methods of Mounting Large Telescopes 293
XXI.— The Adjustments of the Equatorial 328
XXII.— The Equatorial Observatory 337
XXIII.— The Siderostat 343
XXIV.— The Ordinary Work of the Equatorial 349
BOOK VI.
ASTRONOMICAL PHYSICS.
XXV.— The General Field of Physical Inquiry 371
XXVI.— Determination of the Light and Heat of the Stars 377
XXVII.— The Chemistry of the Stars: Construction of the Spectroscope 386
XXVIII.—
                                                                                                                                                                                                                                                                                                           

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