Beers, D. G, et al. Map of Cambria Co., Pennsylvania: from actual surveys & official records. Philadelphia: Published by A. Pomeroy, . Phila.: Printed by Fred. Bourquin, 1867. Map. Retrieved from the Library of Congress, <https://www.loc.gov/item/2012592157/>.
A typical heating element is usually a coil, ribbon (straight or corrugated), of strip of wire that gives off heat much like a lamp filament. When an electric current flows through it, it glows red hot and converts the electrical energy passing through it into heat, which it radiates out in all directions.
1 Isolated by Sir Humphry Davy in 1808. 2  For many years magnesium was thought to be the same element as calcium. 3  A magnesium fire is very difficult to put out as it can burn in nitrogen, carbon dioxide, and water.