PREFACE.
INTRODUCTION.
PTOLEMY.
COPERNICUS.
TYCHO BRAHE.
GALILEO.
KEPLER.
ISAAC NEWTON.
FLAMSTEED.
HALLEY.
BRADLEY.
WILLIAM HERSCHEL.
LAPLACE.
BRINKLEY.
JOHN HERSCHEL.
THE EARL OF ROSSE.
AIRY.
HAMILTON.
LE VERRIER.
ADAMS.
