tailieunhanh - Mathematical Recreations and Essays, by W. W. Rouse Ball

Grey iron metal and yellow sulfur are both chemical elements, and they can be mixed together in any ratio to form a yellow-grey mixture. No chemical process occurs, and the material can be identified as a mixture by the fact that the sulfur and the iron can be separated by a mechanical process, such as using a magnet to attract the iron away from the sulfur. | Project Gutenberg s Mathematical Recreations and Essays by W. W. Rouse Ball 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 Title Mathematical Recreations and Essays Author W. W. Rouse Ball Release Date October 8 2008 EBook 26839 Language English Character set encoding ISO-8859-1 START OF THIS PROJECT GUTENBERG EBOOK MATHEMATICAL RECREATIONS First Edition Feb. 1892. Reprinted May 1892. Second Edition 1896. Reprinted 1905. MATHEMATICAL RECREATIONS AND ESSAYS BY . ROUSE BALL Fellow and Tutor of Trinity College Cambridge. FOURTH EDITION London MACMILLAN AND co. Limited NEW YORK the MACMILLAN company 1905 All rights reserved.