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“I shall straight conduct you to a bill-siz'e, laboricus indeed at the first as
cent; but else so smooth, so green, so full of goodly prospect and melodious
Sunds on every side, that the harp of Orpheus was not more charıning."

Milton.

STEREOTYPE EDITION.

BOSTON:
PUBLISITED 'BY HILLIARD, GRAY AND CO.

1536.

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Entered according to Act of Congress, in the year 1836,

By John H. Wilkins, In the Clerk's Office of the District Court of Massachusetts.

PRESERVATION MASTER

AT HARVARD

RECOMMENDATIONS.

MR. WILKINS' elementary work on astronomy appears to us to be made upon an excellent plan, in which he adopts the most recent and approved distribution of the subject. The several parts are arranged in a simple and clear method, and the leading facts and principles of the science, judiciously selected and concisely stated. It contains much matter within a narrow compass, embracing such recent discoveries and results, as properly come within the author's plant It is well adapted to the purposes of instruction, and will, wo have no doubt, be found to be very convenient and useful by those teachers, who may put it into the hands of pupils of an age and previous attainments to qualify them for this study.

ELISHA CLAPP.
WILLARD PHILLIPS.

Dear Sir, I HAVE examined your treatise on astronomy, and I think that subject is better explained, and that more matter is contained in this, than in any other book of the kind, with which I am acquainted; I therefore cheerfully recommend it to the patronage of the public.

With respect, sir,
Your obedient servant,

WARREN COLBURN. MR. J. H. WILKINS.

Boston, 14 June, 1822.

Wilkins' Elements of Astronomy, by presenting in a concise, but perspicuous and familiar manner, the descriptive and physical branch. es of the science, and rejecting what is merely mechanical, exhibits to the student all that is most valuable and interesting to the vouthful mind in this sublime department of human knowledge.

. WALTER R. JOHNSON,

Principal of the Academy, Germantown. Germantown, (Penn.) 5th June, 1823.

Having examined the work above described, I unite in opinion with " Walter R. Johnson concerning its merits.

... ROBERTS VAUX. Philadelphia, 6th Mo. 11, 1823.

Messrs. Cummings, Hilliard, f. Co.

Having been partially engaged in giving instruction to youth, for the last fifteen years, it has been necessary for me to examine all the treatises on education which came within my reach. Among other treatises examined, there have been several on Astronomy. Of these, the “ Elements of Astronomy, by John H. WILKINS, A. M.” recently published by you, is, in my opinion, decidedly the best. I have accordingly introduced it into my Seminary, and find it well calculated to answer its intended purpose, by plain illustrations to lead young persons to a knowledge of that most interesting science.

J. L. BLAKE,

Principal of Lit. Sem. for Young Ladics. Boston, Jan. 5, 1825.

· DIRECTIONS FOR PLACING THE PLATES.

COPPERPLATES. Frontispicce to front title page.--All the rest in order at the end.

WOOD CUTS. Relative sizes of the Planets,

Page 7 Telescopic Appearances of Venus,

Mars,
Jupiter, -
New Moon,

ADVERTISEMENT.

'' TO THE SECOND EDITION.

The rapid sale of the first edition of this work, the author is willing to attribute to the obvious public desin deratum of a work of this kind, rather than to any peculiar merit of his, production. He is not the first, nor probably will he be the last, to form a more correct judgment of what the public need, than of his own ability to supply that deficiency. The encouragement which he has received, has, however, induced him to correct and somewhat enlarge his work. A great number of facts, omitted in the first edition, are noticed in this, both in the Descriptive and Physical part. To relieve the pupil from a dry narration of facts, or ab.. stract illustration of principles, the author has subjoined to their proper sections and articles, a popular descripe. tion of several of the most striking natural appearances and phenomena. He has also greatly increased the number of questions. Upon the whole, he feels confident, that the relative value of his work is not diminishod by having its size increased. '

Several instructers have suggested, that it might be useful to subjoin Tables for calculating eclipses. On this subject the author would only remark, that these Tables and the necessary instructions for applying them, would swell the work to a size, that would in a considerable degree defeat the objects of its publication,

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