A Wisdom Archive on USA

Coal mining is the extraction of coal from the Earth for use as fuel. Coal mining - Methods of extraction. The most economical of methods of coal extraction from coal seams depends on the depth and quality of the seams, and also the geology and environmental factors of the area being mined. If the coal seams are near the surface, the coal is extracted by strip mining. Strip mining exposes the coal by the advancement of an open pit or strip. As the coal is exposed and extracted, the overburden from th ... Including:

• Coal mining - Methods of extraction
• Coal mining - History
• Coal mining - Dangers to miners
• Coal mining - Environmental impacts
• Coal mining - External link

Read more here: » Coal mining: Encyclopedia - Coal mining

1920 (MCMXX) is a leap year starting on Thursday (link will take you to calendar) 1920 - Events. January 7 - Forces of Russian White admiral Kolchak surrender in Krasnoyarsk. January 9 - Britain announces it will build 1,000,000 homes for war veterans. The promise will never be fulfilled in full. January 9 - Thousands of onlookers watch as "The Human Fly" George Polley, climbs the New York Woolworth Building. He has reached the 30th floor wh ... Including:

• 1920 - Events
• 1920 - February
• 1920 - March
• 1920 - April-May
• 1920 - June-July
• 1920 - August-September
• 1920 - October-November
• 1920 - December
• 1920 - Undated
• 1920 - Births
• 1920 - January
• 1920 - February-March
• 1920 - April
• 1920 - May
• 1920 - June-July
• 1920 - August-December
• 1920 - Date unknown
• 1920 - Deaths
• 1920 - Nobel Prizes

Read more here: » 1920: Encyclopedia - 1920

Alabaster (sometimes called satin spar) is a name applied to varieties of two distinct minerals: gypsum (a hydrous sulfate of calcium) and the calcite (a carbonate of calcium). The former is the alabaster of the present day; the latter is generally the alabaster of the ancients. The two kinds are readily distinguished from each other by their relative hardnesses. The gypsum kind is so soft as to be readily scratched by a finger-nail (hardness 1.5 to 2), while the calcite kind is too hard to be scratched in this wa ... Including:

• Alabaster - Calcite Alabaster
• Alabaster - Gypsum Alabaster

Read more here: » Alabaster: Encyclopedia - Alabaster

1914 (MCMXIV) is a common year starting on Thursday. (see link for calendar) 1914 - Events. January 4 - 77 seal hunters freeze to death on ice near Labrador. January 5 - Ford Motor Company announces an eight-hour workday and a minimum wage of $5 for a day's labor. January 9 - Phi Beta Sigma Fraternity, Inc. founded at Howard University in Washington, D.C. January 10 - Mexican Revolution - Pancho Villa's troops take Ojinaga in the Mexican state of ChihuahuaIncluding:

• 1914 - Events
• 1914 - May-July
• 1914 - August
• 1914 - September-October
• 1914 - November-December
• 1914 - Unknown dates
• 1914 - Ongoing events
• 1914 - Births
• 1914 - January-February
• 1914 - March-April
• 1914 - May-June
• 1914 - July-September
• 1914 - October-December
• 1914 - Deaths
• 1914 - Nobel Prizes
• 1914 - Fictional references

Read more here: » 1914: Encyclopedia - 1914

1922 (MCMXXII) was a common year starting on Sunday (see link for calendar). 1922 - Events. January 7 - Dáil Éireann, the extra-legal parliament of the Irish Republic, ratifies the Anglo-Irish Treaty by 64-57 votes. January 8 - The Social Democratic Youth League of Norway is founded. January 10 - Arthur Griffith is elected President of Dáil Éireann. January 11 - First successful insulin treatment of diabetes. January 12 - Briti ... Including:

• 1922 - Events
• 1922 - Births
• 1922 - January-March
• 1922 - April-June
• 1922 - July to December
• 1922 - Deaths
• 1922 - Marriages
• 1922 - January-March
• 1922 - April-June
• 1922 - July to December
• 1922 - Nobel Prizes
• 1922 - Heads of state in 1922

Read more here: » 1922: Encyclopedia - 1922

1930 (MCMXXX) is a common year starting on Wednesday. 1930 - Events. January 6 - The first diesel-engine automobile trip is completed (Indianapolis, Indiana, to New York City). February 18 - While studying photographs taken in January, Clyde Tombaugh discovers Pluto February 18 - Elm Farm Ollie becomes the first cow to fly in an airplane and also the first cow to be milked in an airplane. 1930 - March. ... Including:

• 1930 - Events
• 1930 - March
• 1930 - April-May
• 1930 - June-August
• 1930 - September-December
• 1930 - Unknown dates
• 1930 - Births
• 1930 - January-February
• 1930 - March
• 1930 - April
• 1930 - May-August
• 1930 - September-December
• 1930 - Date unknown
• 1930 - Deaths
• 1930 - Nobel Prizes

Read more here: » 1930: Encyclopedia - 1930

1994 (MCMXCIV) was a common year starting on Saturday of the Gregorian calendar, and was designated the International year of the Family. 1994 - Events. January 1 - North American Free Trade Agreement (NAFTA) goes into effect January 1 - Zapatista Army of National Liberation begins war in Chiapas, Mexico January 1 - Bantustans join South Africa January 6 - Nancy Kerrigan is clubbed on the right leg by an assailant under orders from figure skating rival ... Including:

• 1994 - Events
• 1994 - February
• 1994 - March
• 1994 - April
• 1994 - May
• 1994 - June
• 1994 - July
• 1994 - August
• 1994 - September
• 1994 - October
• 1994 - November
• 1994 - December
• 1994 - Births
• 1994 - Deaths
• 1994 - January
• 1994 - February-April
• 1994 - May-October
• 1994 - November-December
• 1994 - Nobel Prizes
• 1994 - Fields Medalists
• 1994 - Templeton Prize
• 1994 - Right Livelihood Award

Read more here: » 1994: Encyclopedia - 1994

Foster joined the Socialist Party of America in 1901 and was a member until he was expelled in 1909 for activity in a left wing faction of the party in Washington. Foster then joined the Industrial Workers of the World (IWW) in 1909, when he took part in one of the IWW's "free speech fights" in Tacoma, Washington. He changed his middle initial from "E" to "Z" while in Tacoma in order to avoid confusi ...

Read more here: » William Z. Foster: Encyclopedia II - William Z. Foster - Entry into politics and trade union work

1931 (MCMXXXI) is a common year starting on Thursday. 1931 - Events. January 4 - Elly Beinhorn begins her flight to Africa January 6 - Thomas Edison submits his last patent application. January 22 - Sir Isaac Isaacs sworn in as the first Australian-born Governor-General of Australia January 25 - Mohandas Gandhi released again January 27 - Pierre Laval forms a government in France February 3 - Napier earthquake - mu ... Including:

• 1931 - Events
• 1931 - April-August
• 1931 - September-December
• 1931 - Undated
• 1931 - Births
• 1931 - January
• 1931 - February-April
• 1931 - May-August
• 1931 - September-December
• 1931 - Month/day unknown
• 1931 - Deaths
• 1931 - Undated
• 1931 - Nobel Prizes

Read more here: » 1931: Encyclopedia - 1931

Canada - Mexico - South Africa - U.S. Rail Transport - Science - Sports Births - Deaths 1893 was a common year starting on Sunday (see link for calendar). 1893 - Events. January 1 - Japan accepts the Gregorian calendar January 2 - Introduction by Webb C. Ball of the General Railroad Timepiece Standards in North America: Railroad chronometers January 13 - The Independent Labour Party of the UK has its first meeting. January 17 - Intervention by the ... Including:

• 1893 - Events
• 1893 - Births
• 1893 - Exact month/day of birth unknown
• 1893 - Deaths
• 1893 - Marriages

Read more here: » 1893: Encyclopedia - 1893

1916 (MCMXVI) is a leap year starting on Saturday (link will take you to calendar) 1916 - Events. January 1 -The first successful blood transfusion using blood that had been stored and cooled. Impressionist Monet paints 'Water Lilies'. January 5 - Heavy rain - allegedly caused by rainmaker Charles Hatfield - begins; it will cause flooding around San Diego, California January 8 - Allied forces withdraw from Gallipoli January 13/14 - ... Including:

• 1916 - Events
• 1916 - March-June
• 1916 - July-August
• 1916 - October-December
• 1916 - Unknown dates
• 1916 - Ongoing events
• 1916 - Disputed events
• 1916 - Births
• 1916 - January-March
• 1916 - April-June
• 1916 - July-December
• 1916 - Deaths
• 1916 - Nobel Prizes

Read more here: » 1916: Encyclopedia - 1916