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  ASTRONOMY

  WITH AN OPERA-GLASS


  A POPULAR INTRODUCTION TO THE STUDY OF THE STARRY
  HEAVENS WITH THE SIMPLEST OF OPTICAL INSTRUMENTS


  WITH MAPS AND DIRECTIONS TO FACILITATE THE RECOGNITION
  OF THE CONSTELLATIONS AND THE PRINCIPAL STARS VISIBLE
  TO THE NAKED EYE


  BY

  GARRETT P. SERVISS


  "Known are their laws; in harmony unroll
  The nineteen-orbed cycles of the Moon.
  And all the signs through which Night whirls her car
  From belted Orion back to Orion and his dauntless Hound,
  And all Poseidon's, all high Zeus' stars
  Bear on their beams true messages to man."
                                           POSTE'S ARATUS.


  _THIRD EDITION_


  NEW YORK
  D. APPLETON AND COMPANY
  LONDON: CAXTON HOUSE, PATERNOSTER SQUARE
  1890


  COPYRIGHT, 1888,
  BY D APPLETON AND COMPANY.




TO THE READER


In the pages that follow, the author has endeavored to encourage the
study of the heavenly bodies by pointing out some of the interesting and
marvelous phenomena of the universe that are visible with little or no
assistance from optical instruments, and indicating means of becoming
acquainted with the constellations and the planets. Knowing that an
opera-glass is capable of revealing some of the most beautiful sights in
the starry dome, and believing that many persons would be glad to learn
the