* 1873 – The Clay Street Hill Railroad begins operating the first cable car in San Francisco's famous cable car system.

It is one of the seven Millennium Prize Problems selected by the Clay Mathematics Institute to carry a US $ 1, 000, 000 prize for the first correct solution.

The Clay Mathematics Institute has offered a $ 1 million USD prize for the first correct proof, along with prizes for six other mathematical problems.

Clay pigeons are fired off two at a time from a first person perspective and are aimed into the distance.

Duck Hunt, Clay Shooting mode appears as the second round with the first round being the two duck variation ( the arcade version never had one duck ).

The existence and mechanism for ion selectivity was first postulated in the 1960s by Clay Armstrong.

* 1960 – In Louisville, Kentucky, Cassius Clay ( who later takes the name Muhammad Ali ) wins his first professional fight.

It is one of the seven Millennium Prize Problems, for which the Clay Mathematics Institute offered a $ 1, 000, 000 prize for the first correct solution.

* 1960 – The boxer Muhammad Ali ( then Cassius Clay ) is awarded the gold medal for his first place in the light heavyweight boxing competition at the Olympic Games in Rome.

The Compromise of 1850 had been first proposed by the Whig Henry Clay of Kentucky.

Another remnant led by John Quincy Adams and Henry Clay formed the National Republicans in 1828 ; It held its first convention in late 1831 in Baltimore.

But, Laura Clay and Cora Wilson Stewart of Kentucky were nominated as candidates for the presidency at the 1920 Democratic National Convention and received " the first vote cast for a woman in the convention of either of the two great parties.

Along with other 1960 Olympic athletes such as Cassius Clay, who later became Muhammad Ali, Rudolph became an international star due to the first international television coverage of the Olympics that year.

* October 29 – In Louisville, Kentucky, Cassius Clay ( later Muhammad Ali ) wins his first professional boxing match.

* July 1 – United States statesman Henry Clay is the first to receive the honor of lying in state in the United States Capitol rotunda.

Clay tablets were used as the first known writing medium, inscribed with cuneiform script through the use of a blunt reed called a stylus.

Clay led on the first ballot, but circumstances conspired to deny him the nomination.

Clay, the party's most prominent congressional leader, was chosen on the first ballot despite having lost two prior presidential elections: in 1824 to John Quincy Adams as a Democrat-Republican, then in 1832 to Andrew Jackson as a National Republican.

The position of Speaker first gained power under Henry Clay ( 1811 – 1814, 1815 – 1820, and 1823 – 1825 ).

On December 29, 1806, Clay was sworn in as senator, serving for less than one year that first time.

Clay was the first person to lie in state in the United States Capitol.

Jars of Clay signed with Essential Records and started recording their first full-length studio album, titled Jars of Clay.

Backstage at the 2006 GMA Awards, Jars of Clay labeled the album their first ever rock record.

Jars of Clay released the first EP of the " Live at Gray Matters " series in the 5th of February.

Centering around this historic old structure, a group of public-spirited Barbour County citizens have organized and planned a week-long series of events, beginning on May 28th and continuing through June 3rd, to observe most appropriately the centennial of the first land engagement of the Civil War at Philippi.

Registrations of new cars in Dallas County cracked the 3,000 mark in March for the first time this year.

This year-to-year decline for Dallas County closely follows the national trend -- estimated sales of domestic cars in the U.S. for first three months of 1961 were about 1,212,000 or 80 per cent of the total in the first quarter a year earlier.

* 2007 – An EF2 tornado touches down in Kings County and Richmond County, New York, the most powerful tornado in New York to date and the first in Brooklyn since 1889.

During Baldwin III's reign, the County of Edessa, the first crusader state established during the First Crusade, was conquered by Zengi, the Turkic emir of Aleppo.

In his 20s he attended barber school, got married, and moved first to Roy, New Mexico then returned to Turkey in Hall County ( now considered his home town ) to work as a barber at Hamm's Barber Shop.

File: Cabotslanding. jpg | Cabot's Landing, Victoria County, commemorating the " first land seen " by explorer John Cabot in 1497

On 10 March 2009 the CIRA claimed responsibility for the fatal shooting of a PSNI officer in Craigavon, County Armagh — the first police fatality in Northern Ireland since 1998.

County Dublin was one of the first parts of Ireland to be shired by King John of England following the Norman invasion of Ireland.

In 1969, he became the first African American since the Reconstruction era to have been elected as mayor in a Mississippi city, Fayette in Jefferson County.

The Legislature named Carson City to be the seat of Ormsby County and selected the hotel as the territorial prison with Curry serving as its first warden.

In 2008 however Barack Obama became the first Democrat since 1964 to win Ormsby County / Carson City, defeating John McCain 49 % to 48 %, by 204 votes, a margin of under 1 %.

The stadium is located in Tarrant County, the first time the Cowboys will call a stadium home outside of Dallas County.

The first of these two groups, led by Barton W. Stone began at Cane Ridge, Bourbon County, Kentucky.

The first child of Augustine Washington ( 1694 – 1743 ) and his second wife, Mary Ball Washington ( 1708 – 1789 ), George Washington was born on their Pope's Creek Estate near present-day Colonial Beach in Westmoreland County, Virginia.

Thanks to Lawrence's connection to the powerful Fairfax family, at age 17 in 1749, Washington was appointed official surveyor for Culpeper County, a well-paid position which enabled him to purchase land in the Shenandoah Valley, the first of his many land acquisitions in western Virginia.

Despite the abundance of well-known seeps in southern California, the first commercial oil well in California was drilled in Humboldt County, northern California in 1865.

Production in Santa Barbara County began in the 1890s with the development of the Summerland Oil Field, which included the world's first offshore oil wells.

Rapp was able to secure a large tract of land in Pennsylvania and started his first commune, known as Harmonie or Harmony, in Butler County, Pennsylvania, where the Society existed from 1804 to 1815.

Some private rural operators exist, such as Halpenny's in Blackrock, County Louth, which was the first private bus operator to run a public service in Ireland, Bus Feda ( Feda O ' Donnell Coaches ), which operates twice daily routes from Ranafast, County Donegal to Galway and back, and Lough Swilly Bus Company.

The County of Roscommon was separated from Connacht before 1292, and the first session of the Irish parliament in 1297 created the new shires of County Kildare, Meath and Ulster.