Technology.
	The Zipper as we now know it was developed by Gideon Sundback, who patented the "Separable Fastener" on March 20, 1917. The word "zipper" was coined by the B.F. Goodrich company when it used the device on a line of rubber galoshes marketed under the trade name "Zipper Boots." Joseph Bramah held patents for a diverse range of items, including: flushing water closet, burglar-proof lock, hydraulic press, rotary motion pump, wood planing machine, automatic bank note printing, and penmaking machine. The Grand Coulee Dam stands across the Columbia Rivewr about 90 miles northwest of Spokane, Washington. It is 4,173 feet long, stands 550 feet high, and is the third largest producer of electricity in the world. Joshua Lionel Cowen got his inspiration for what are now known as Lionel Trains when he saw a wind-up toy train in a toy store window. Joseph Baermann Strauss built some 400 drawbridges across the United States over the course of his career, as well as the world-famous Golden Gate Bridge in San Francisco. The Law of the Conservation of Energy Energy can be changed in form, but cannot be created or destroyed; this is the basic law of the conservation of energy. Samuel Finley Breese Morse struggled for many years to gain recognition as a painter, but became better known for the telegraph, which he successfully demonstrated on May 24, 1844. Soichiro Honda began manufacturing piston rings in 1936. He began manufacturing motorcycles in 1948, and by 1952 Honda accounted for 70% of Japan's motorcycle production. He began manufacturing automobiles in the early 1960's, and Honda race cars were winning races by 1965. Abraham Darby and the Bristol Iron Company of Coalbrooke, England Abraham Darby patented the process of making cast iron pots using molten metal poured into molds made from sand. He then established a company to make higher-quality iron, which in turn led to improvements in the making of wrought iron, and to the building of the world's first iron bridge. Whiskey (Whisky) is an alcoholic beverage distilled from grain and malt. It is distinguished from other distilled alcoholic beverages by being aged in wood barrels a minimum of two years and by not being flavored by anything other than the grains used to produce it and the wood in which it is aged Mathew B. Brady opened a daguerreotype gallery in New York City in 1844. By 1850 he had gained a reputation as one of America's greatest portrait photographers, and by the time of his death had photographed every President from John Quincy Adams to William McKinley. He also gained considerable fame for his photographic record of the Civil War. Daniel Burnap was a Connecticut clockmaker whose clocks were well-known for their fine craftsmanship and incredible timekeeping accuracy. Ice Cream is a frozen concoction that, by law, contains at least 10% milk fat and 20% milk solids by volume. It is made by slowly mixing a mixture of milk, sugar and flavorings using a solution of briny ice water.