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BY JOHN GUMMERE, A. M.

FELLOW OF THE AMERICAN PHILOSOPHICAL SOCIETY, AND CORRESPONDING
MEMBER OF THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA.

FIFTH EDITION, IMPROVED.

PHILADELPHIA :

KIMBER AND SHARPLESS, NO. 8, SOUTH FOURTH STREET.

ADAM WALDIE AND CO. PRINTERS.

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Eastern District of Pennsylvania, to wit:

BE IT REMEMBERED, that, on the second day of September, in the fiftieth year of the Independence of the United States of America, A. D. 1825, John Richardson and Kimber & Sharpless of the said district have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following:-TO WIT:

"A Treatise on Surveying, containing the Theory and Practice: to which is " prefixed, a perspicuous System of Plane Trigonometry. The whole clearly "demonstrated, and illustrated by a large number of appropriate Examples. "Particularly adapted to the use of Schools. By John Gummere. Fourth "edition, improved."

In conformity to the act of the 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 times therein mentioned." And also to the 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 proprietors 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."

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D. CALDWELL,

Clerk of the Eastern District of Pennsylvania.

21 X-15

1832

RECOMMENDATIONS.

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I am much pleased with the Treatise on Surveying, compiled by John Gummere, and hope to see it speedily introduced into general use. With those who appreciate its merits, I apprehend it will supersede every other tract on the subject with which I am acquainted.

ENOCH LEWIS.

We have no hesitation in giving it as our judgment, that Gummere's Treatise on Surveying is the best publication on the subject with which we are acquainted, and we, accordingly, take great pleasure in recommending it to the public patronage:

R. PATTERSON,

Vice president of the American Philosophical Society.

R. M. PATTERSON, M. D.

Prof. of Math. and Nat. Phil. in the Univer. of Pennsylvania.

The new Treatise on Surveying by John Gummere, recently published by Kimber and Richardson, of Philadelphia, is, in our estimation, a very judicious performance.

Several things are omitted which only serve to encumber other works on this subject, and a variety of new rules and illustrations are introduced, particularly under the heads of laying out, measuring, and dividing land, which, in connection with its general arrangement, render this Treatise on Surveying, in our opinion, decidedly preferable to any other which has met the public eye. ROBERT ADRAIN,

Prof. of Math. and Nat. Phil. Columbia College, New York.

JOHN GRISCOM,

Teacher of Math. Prof. of Chem. Colum. Col. New York.

Having carefully examined a Treatise on Surveying, by John Gummere, I feel myself perfectly justifiable in pronouncing it to be the best practical work on the subject extant.

DAVID M.CLURE,

Principal of the Naut. and Math. Acad. Philadelphia.

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The following letter was addressed by the late Professor of Mathematics, &c. in Vermont College, to R. M. Patterson, M. D. Prof. of Math. and Nat. Phil. in the University of Pennsylvania.

DEAR SIR,

Philadelphia, July 16, 1814.

Agreeably to your request I have cursorily examined Gummere's Treatise on Surveying, and conceive that the author has performed all that his preface promises. The subject is logically distributed and arranged, and the principles correctly and perspicuously displayed. The examples are very properly multiplied and ingeniously varied, so as to prepare the student for the most unusual cases. That the author's success in the publication may equal his high reputation for science, is a wish, which (as far as good wishes go) ought to be as satisfactory to him, as it is sincere on the part of

Yours with very high respect and esteem,
JAMES DEAN.

Extract from a letter from Samuel Knox, Esq. principal of the Baltimore College. "I received and submitted to our Mathematical Professor, Gummere's Surveying. We approve of the work, and as often as any of our students want an author on that branch, we shall recommend it."

I remain very respectfully, your obedient, humble servant, &c. SAMUEL KNOX.

I fully concur with the gentlemen who have already given recommendations of Gummere's Treatise on Surveying, in considering the work as well calculated to give youth a correct knowledge of the principles of Surveying, and that it is to be preferred to any treatise on that subject, known in this country.

ELIJAH SLACK,

Prof. of Math. in Princeton College.

For sale by the publishers: Solutions to the Miscellaneous Questions in Gummere's Surveying. By the Author. Price twenty-five cents.

Also a Stereotype edition of Mathematical Tables, containing Tables of Latitude and Departures, of Logarithms from one to ten thousand; and artificial Sines, Tangents and Secants; the whole carefully revised and compared with

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