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District of Perman...--To Hil.
DE IT REMEMBERED, That on the twenty-seventh day

year of or

United States of America, GEORGE CURTis 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 : “ A treatise on fiunter's Scale, and the Sliding Rule, together, with a description and use of the Sector, the Protractor, Plain Scale, and Line of Chords; or an easy method of finding the area of superfices, and of mipasuring Boards and finding the solid contents of bodies, especially that of timber, by the Sliding Rule, and also of gauging Casks and Round Timber. To theşe are added several useful Logarithmick Taboles, Tables of Latitude and Departure, and a table of Natural Radii, pot known to be heretofore published. By GEORGE CURTIS, Math.” In conformity to the Act of Congress of the United States, edititled "an act for the encouragment of learning, by securing the copies of maps, charts, and books to the authors and proprietors of such copies, during the times therein mentioned.”


Clerk of the District of Vermont. A true Copy of Record, examined and sealed by

J. GOVE, Clerk.




The primary design of this Treatise, is to introduce a

more general attention to, and knowledge of the instruments herein described. Notwithstanding the many books that are daily issuing from the press, on other subjects, yet I have known of none that can preclude the benefits of a

work of this kind.

The author was led into these views

of 2-15.70

by journeying through many parts of the United States, and finding a work on the subject here treated of, very much needed. It is designed as a pocket companion, for the Surveyor, Mechanick, and for those who deal in timber and boards, particularly by its tables of round and square timber, for the Wheelright, the Housecarpenter, Joiner, Cooper, and many other Dealers and Craftsmen, as well as the Grocer, for gauging expeditiously. How far the author has succeeded in his views, and endeavours to render it useful to mankind, must be decided by the test of experience.

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