ELEMENTS

OF

ASTRONOMY

ILLUSTRATED BY THE MORE USEFUL

PROBLEMS ON THE GLOBES,

AND ADAPTED FOR

THE USE OF YOUNG PERSONS,

AND

THOSE UNVERSED IN MATHEMATICS,

WITH A

SET OF QUESTIONS FOR EXAMINATION.

BY W. JEVONS JUN.

LONDON:

PRINTED FOR LONGMAN, REES, ORME, & CO.

PATERNOSTER-ROW;

AND ROWLAND hunter, st. PAUL'S CHURCH-YARD; AND SOLD BY
G. & J. ROBINSON, W. GRAPEL, AND ROCKLIFF & DUCKWORTH,
LIVERPOOL.

1828.

OTHECA

ILLUM

BOD

LIVERPOOL:

PRINTED BY ROCKLIFF AND DUCKWORTH.

PREFACE.

THE study of Astronomy holds very deservedly a. prominent place in every system of liberal education, and yields in importance to few, if any, of the subjects which usually employ the attention of the young. So close, indeed, is its connexion with Geography, that the one cannot be studied altogether independently of the other; and if it be important to know something of the form and dimensions of the globe upon which we dwell, and of its various countries, inhabitants, and productions, it is surely of equal importance to know what station it holds in the great system of the universe, and how it is related to those magnificent orbs which so powerfully arrest our notice in the heavens. No branches of study are so important in education, as those which call into exercise the powers of observation, and direct those powers to their noblest field of exercise-the great book of Nature. In the