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THE

SCHOOL LIBRARY.

PUBLISHED UNDER THE SANCTION OF THE BOARD OF EDUCATION
OF THE STATE OF MASSACHUSETTS.

VOL. XX.

LETTERS ON ASTRONOMY,

ADDRESSED TO A LADY:

IN WHICH

THE ELEMENTS OF THE SCIENCE ARE FAMILIARLY
EXPLAINED

IN

CONNEXION WITH ITS LITERARY HISTORY.

BY DENISON OLMSTED, A.M..

BOSTON:

THOMAS H. WEBB, AGENT.

THIS VOLUME IS SANCTIONED, BY THE BOARD OF EDUCATION OF THE STATE OF MASSACHUSETTS, AS ONE OF THE SERIES, ENTITLED, THE SCHOOL LIBRARY,' PUBLISHED BY MARSH, CAPEN, LYON, AND WEBB.

JOHN DAVIS,

GEORGE HULL,

GEORGE PUTNAM,

ROBERT RANTOUL, JR.,

THOMAS ROBBINS,

CHARLES HUDSON,

GEORGE N. BRIGGS,

WILLIAM G. BATES.