Posts : 228
Join date : 01/06/2010
|Subject: Also learn a subject Fri Oct 22, 2010 8:43 pm|| |
No matter who they are inevitable in life, when frustrated, and Edison's life, although there is a brilliant achievement, but he also has frustrated moments, such as mining the cause of failure. So, this whole story about what it? cheap coach bags
Iron is the basis for all industry. Shipbuilding, construction of the building, as well as iron bridge and machinery, iron can be said to countless uses, along with the progress of civilization, iron requirements are increasing. chanel bags
In 1880 the invention of Edison as the tram began to prepare for the time, he brought along a few colleagues to investigate the Long Island area of travel. Because he had heard this place has a good iron sand. To Long Island, so, dozens of kilometers of coast iron sand everywhere, so he was surprised! "So many of the iron ore, discarded regardless of pity too! To points with magnetic sand and iron, may get several hundred thousand tons of iron it." chanel bags
Edison found a black sand beach of Long Island, after doing a detailed under the notes, and sketches depicting the project and wondered about the possibility of establishing such enterprises. He brought back samples of the black sand laboratory. In the experiment, we found tiny black grains of sand can be attracted to the magnet. In the early 90s, the east coast to provide iron ore, steel industry, the obstacles have emerged: If you use fewer reserves of the western high grade iron ore, we must pay substantial transportation costs; in the east away from the steel mills closer mine, the only find low-grade ore, which also must be used before the selection process more costly. After learning that Edison himself made this point a simple question - why can not crush the ore slag and impurities through the magnet to separate it?