his satirical poem “La Bibl,” the use of a touched needle in a straw floating on water. It is claimed that the inhabitants of Amalfi particularly the jeweler Flavio Gioia made compasses, similar to today’s instruments with a rotating disc marked out in divisions, at the beginning of the 13th century. Peter Peregrinus, in his famous treatise “Epistola and Sygerum de Foucoucourt milite de magnet,” in 1269, stated that an oblong piece of iron which had been touched by a lodestone would turn toward the pole if floated on a piece of wood. There is truly a prolonged qualifications from the campaign of magnets to alleviate the "hardness" of mineral-containing waters, and especially to look after the deposition of scale in teapots, plumbing related systems, evaporators, and boilers. There are now a tremendous broad variety of models near to the marketplace place that state to cut back scale deposition, and some state to "soften" the consuming water as well. The earlier models mainly employed lasting magnets, but lots of now use alternating magnetic or electrostatic fields. Round Attraction Magnet Attach Cast Alnico Magnet the other end of the string to the end of a 1/2-inch diameter wooden dowel rod, available at home improvement stores. Cut two fish shapes each from primary colored 9 by 12-inch construction paper. Make one or two fish for each child in the class. 2.The easiest way to make adhesive business card magnets is to use peel and stick magnetic backing in business card size. Peel the paper from the adhesive magnet, center the business card on top of the sticky side of the magnet, and press down. You have a magnetic business card. In its most basic form, a motor converts an electrical current (either AC or DC) into rotational movement. The current is applied to an electromagnetic coil that creates a temporary magnetic field with a particular direction of magnetism creating a north and south pole at each end of the electromagnet, which can be reversed by reversing the Ceramic Magnets direction of the current in the coil. This magnetic field interacts with the magnetic field produced by a series of permanent magnets aligned with alternating polarities. We have developed environmentally sound processes and products that meet these requirements. Customers may use the neodymium magnets products with confidence with regard to these aspects. Our surface treatment technology is in compliance with international environmental standards, such as the RoHS directive and ELV directive..