One day St. Peter saw a street gang walking up to the Pearly Gates.
St. Peter ran to God and said, "God, there are some low-life street gang members at the Gates. What do I do?"
God relied, "Just do what you normally do with that type. Redirect them."
St. Peter went back to carry out the order, but he suddenly came running back and yelling, "God, God, they're gone! They're gone!"
"The street gang?"
"No, the Pearly Gates!"
Arago announces electromagnetismIn 1820, Francois Arago announced that a copper wire between the poles of a voltaic cell, could laterally attract iron filings to itself (Ann. de Chim. et de Physique., xv. p.93). His discovery came in the same year that Oersted discovered that an electric current flowing in a wire would deflect a neighbouring compass needle. Arago in the same publication described how he had successfully succeeded in causing permanent magnetism in steel needles laid at right angles to the copper wire. Arago and André-Marie Ampère, discussed and experimented with forming the copper wire into a helix to intensify the magnetizing action. However, it was not until 1825 that the electromagnet in its familiar form was invented by William Sturgeon.« |
