This book is a treatise on practical geometry, including arithmetic, surveying, and building measurement, written by Jean Abraham, a French mathematician and architect in the 17th century. The book covers a wide range of topics, including the use of the quadrant and sundial for astronomical calculations, the design of arches and vaults, and the calculation of volumes and areas. This book is an important source for the history of architecture and engineering and a valuable reference for anyone interested in practical geometry.

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.