AMERICAN GRAMMAR

OF THE

ELEMENTS OF ASTRONOMY,

ON AN IMPROVED PLAN:

IN THREE BOOKS.

I. THE USE OF THE TERRESTRIAL GLOBE IN
THE SOLUTION OF GEOGRAPHICAL AND
ASTRONOMICAL PROBLEMS.

II. THE USE OF THE CELESTIAL GLOBE IN THE
SOLUTION OF PROBLEMS, RELATIVE TO
THE SUN, PLANETS, AND FIXED STARS.
III. THE SOLAR SYSTEM, AND THE FIRMAMENT

OF FIXED STARS.

THE WHOLE

Systematically Arranged and Scientifically Illustrated;

WITH SEVERAL CUTS AND ENGRAVINGS;

AND ADAPTED TO THE INSTRUCTION OF YOUTH IN
SCHOOLS AND ACADEMIES.

BY JAMES RYAN;

AUTHOR OF "AN ELEMENTARY TREATISE ON ALGEBRA,
THEORETICAL AND PRACTICAL," ETC.

NEW-YORK: $64.16P-A.

PUBLISHED BY COLLINS AND HANNAY.

No. 230 Pearl-street.

har

Southern District of New-York, ss

BE IT REMEMBERED, That on the 22d day of October, A. D. 1825, In the 50th year of the Independence of the United States of America, James Ryan, of the said District, hath deposited in this office the title of a Book, the right whereof he claims as author, in the words following, to wit:

The New American Grammar of the Elements of Astronomy, on an improved plan: in three books. I. The use of the Terrestrial Globe in the Solution of Geographical and Astronomical Problems. II. The use of the Celestial Globe in the Solution of Problems relative to the Sun, Planets, and Fixed Stars. III. The Solar System, and the Firmament of Fixed Stars. The whole systematically arranged and scientifically illustrated; with several cuts and engravings; and adapted to the instruction of youth in schools and academies. By James Ryan, author of "An Elementary Treatise on Algebra, Theoretical and Practical," &c.

In conformity to the Act of Congress of the United States, entitled "An Act for the encouragement of Learning, by securing the copies of Maps, Charts, and Books, to the authors and proprietors of such copies, during the time therein mentioned." And also to an Act, entitled "An Act, supplementary to an Act, entitled an Act for the encouragement of Learning, by securing the copies of Maps, Charts, and Books, to the authors and pro prietors of such copies, during the times therein mentioned, and extending the benefits thereof to the arts of designing, engraving, and etching historical and other prints."

JAMES DILL, Clerk of the Southern District of New-York.

Introduction,

-

PAGE.
1

CHAP

I.

II.

III.

IV.

V.

VI.

VII.

VIII.

Of Latitude and Longitude. Division of

the Earth into Zones and Climates,

Of the natural and artificial division of Time,

Positions of the Sphere. Names assigned

to persons from their different situations

BOOK THE FIRST.

OF THE TERRESTRIAL GLOBE.

-

5

7

12

Definitions and preliminary remarks,

Of the great circles on the Terrestrial Globe,

Of the smail circles on the Terrestrial Globe,

Of the Wooden Horizon, and other appen-

dages to the Terrestrial Globe,

Definitions and terms belonging to the Ter-

restrial Globe,

13

17

20

27

on the Globe, &c.

SS

IX.

Astronomical and Geographical Problems

performed by the Terrestrial Globe,

OF THE CELESTIAL GLOBE.

Definitions and terms belonging to the Ce-