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PRACTICAL ALGEBRA

PRACTICAL ALGEBRA

(REVISED)

PREPARED FOR THE USE OF THE MIDSHIPMEN
AT THE UNITED STATES NAVAL

ACADEMY

BY

STIMSON J. BROWN

Professor of Mathematics, United States Navy

AND

PAUL CAPRON, A. B., A. M.

ANNAPOLIS, MARYLAND

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PREFACE.

This revision of the Practical Algebra is designed as the first volume of a series of text-books written to meet the demand for a more condensed course in mathematics, necessitated by the increased time devoted to the professional subjects of marine and electrical engineering in the last two years at the Naval Academy.

To reach this end, the difficult algebraic proof of some theorems has been omitted, to be taken up later by the more simple and complete methods of the Calculus; and the time thus gained has been utilized for the solution of many problems designed to illustrate theory as well as to gain the important and necessary drill in numerical accuracy.

The methods of Graphic Algebra are carried through the analysis of linear and quadratic equations, with the end in view of eliminating the usual text-book on Conic Sections, which particular subject, together with Solid Geometry, will be given, as far as required by our course, in the introductory chapter of the Calculus.

We are indebted to Professor H. L. Rice, U. S. Navy, for valuable assistance.

U. S. NAVAL ACADEMY, August, 1910.

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