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In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties.[1] It cannot be separated into components by physical separation methods, i.e. without breaking chemical bonds. It can be solid, liquid or gas. | The Project Gutenberg EBook of The Number Concept by Levi Leonard Conant This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title The Number Concept Its Origin and Development Author Levi Leonard Conant Release Date August 5 2005 EBook 16449 Language English START OF THIS PROJECT GUTENBERG EBOOK THE NUMBER CONCEPT Produced by Jonathan Ingram Hagen von Eitzen and the Online Distributed Proofreading Team at http www.pgdp.net THE MACMILLAN COMPANY NEW YORK BOSTON CHICAGO DALLAS ATLANTA SAN .
