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Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, simple or seemingly pure substances found in nature can in fact be mixtures of chemical substances. For example, tap water may contain small amounts of dissolved sodium chloride and compounds containing iron,. | ỉ i Project Gutenberg s The philosophy of mathematics by Auguste Comte 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. org license Title The philosophy of mathematics Author Auguste Comte Translator w. M. Gillespie Release Date May IS 2012 EBook 39702 L anguage Engli sh START OF THIS PROJECT GUTENBERG EBOOK THE PHILOSOPHY OF MATHEMATICS Produced by Anna Hall Albert LAjszlA3 and the Online Distributed Proofreading Team at http wwiJ.pgdp.net This file was produced from images generously made available by The Internet Archive THE PHILOSOPHY OF MATHEMATICS. ỉ ó Project Gutenberg s The philosophy of mathematics by Auguste Comte 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.org license Title The philosophy of mathematics Author Auguste Comte Translator W. M. Gillespie Release Date May 15 2012 EBook 39702 Language English START OF THIS PROJECT GUTENBERG EBOOK THE PHILOSOPHY OF MATHEMATICS Produced by Anna Hall Albert LÃịszlÃ3 and the Online Distributed Proofreading Team at http www.pgdp.net This file was produced from images generously made available by The Internet Archive .
