This book is a textbook on elementary mathematics designed for use in common schools, or public schools, in the late nineteenth and early twentieth centuries. It covers a wide range of topics, including arithmetic, algebra, geometry, and trigonometry, and is written in an accessible and engaging style. The author, John Henry Walsh, was an American mathematician and educator who worked to improve the quality of mathematics education in public schools. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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