Mrs. Applebaum was surprised when she saw her son Burt at home. 'Why are you home from school so early?' asked Mrs. Applebaum.
'I was the only one who could answer a question,” replied Burt.
'Oh, really?” said Mrs. Applebaum proudly. “What was the question?'
'Who threw the eraser at the principal?'
Francesco ZantedeschiDied 29 Mar 1873 (born 1797).Italian priest and physicist, who published papers (1829, 1830) on the production of electric currents in closed circuits by the approach and withdrawal of a magnet, preceding Faraday's classic experiment of 1831. Studying the solar spectrum, Zantedeschi was among the first to recognize the marked absorption by the atmosphere of the red, yellow, and green light. Though not confirmed, he also thought he detected a magnetic action on steel needles by ultra-violet light (1838), at least suspecting a connection between light and magnetism many years before Clerk-Maxwell's announcement (1867) of the electromagnetic theory of light. He experimented on the repulsion of flames by a strong magnetic field.« |
