ility of the solar system; on the nebularhypothesis; on sidereal astronomy; on photography andspectroscopy in their astronomical relations; on the historyof American astronomy, and of the telescope in all lands; onthe special aims and methods of the modern astronomer;and, finally, on the theory of… … CONTENTS Atoms and Sunbeams pAGE By Sir Robert Stawell Ball . . I The Wanderings of the North Pole By Sir Robert Stawell Ball . 22 The Age of the Suns Heat By Sir William Thomson (Lord Kelvin) . . . .41 The Past and Future of our Earth By Richard Anthony Proctor 55 A New Theory of Life in Other…
Astronomy
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