PREFACE.

CONTENTS.

LIST OF ENGRAVINGS.

PART I. ON LIGHT. INTRODUCTION.

PART II. ON TELESCOPES. CHAPTER I. HISTORY OF THE INVENTION OF TELESCOPES.

PART III. ON VARIOUS ASTRONOMICALINSTRUMENTS. CHAPTER I. ON MICROMETERS.

APPENDIX. BRIEF DESCRIPTION OF THE EARL OF ROSSE'S TELESCOPE.

ERRATA.

FOOTNOTES:

THE
PRACTICAL ASTRONOMER,
COMPRISING
ILLUSTRATIONS OF LIGHT AND COLOURS—PRACTICAL
DESCRIPTIONS OF ALL KINDS OF TELESCOPES—THE
USE OF THE EQUATORIAL-TRANSIT—CIRCULAR,
AND OTHER ASTRONOMICAL
INSTRUMENTS,
A PARTICULAR ACCOUNT OF THE
EARL OF ROSSE’S LARGE TELESCOPES,
AND OTHER TOPICS CONNECTED WITH ASTRONOMY.
BY THOMAS DICK, LL.D.
AUTHOR OF THE “CHRISTIAN PHILOSOPHER,” “CELESTIAL SCENERY,”
“THE SIDEREAL HEAVENS,” &C. &C.
Illustrated with One hundred Engravings.

SEELEY, BURNSIDE, AND SEELEY,
FLEET-STREET, LONDON.
MDCCCXLV.

PRINTED BY L. SEELEY.