Ni-Hard

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Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news

Who Invented the Internet?

Ni-Hard

alloy

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cast irons

In iron processing: High-alloy iron
For example, Ni-Hard, a white iron containing 4 to 5 percent nickel and up to 1.5 percent chromium, is used to make metalworking rolls. Irons in the Ni-Resist range, which contain 14 to 25 percent nickel, are nonmagnetic and have good heat and corrosion resistance.
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