symbol in Japanese. My Japanese dictionary calls it the Ha-kenkoroitsu. (from the German word Hakenkreuz, crooked cross) and it describes it at the 45-degree clockwise manji used by the Nazi party. That symbol is usually surrounded by a circle. In Japan. it is unusual to see the manji at that angle.
The first person to propose that magnesium was an element was Joseph Black of Edinburgh in 1755, and an impure form of metallic magnesium was produced in 1792 by Anton Rupprecht who heated magnesia (magnesium oxide, MgO) with charcoal. He named the element austrium after his native Austria.
Berzelius and Klaproth are major figures in the history of chemistry. In addition to their other achievements Berzelius discovered selenium in 1817 and thorium in 1828 while in 1789 Klaproth discovered both uranium and zirconium. Carl G. Mosander, who worked closely with Berzelius, prepared metallic cerium in 1825. First he reacted cerium sulfide with chlorine, yielding anhydrous cerium chloride. He reduced the chloride with potassium, forming potassium chloride and metallic cerium.