Subsequent formalizations were framed as attempts to define " effective calculability " or " effective method "; those formalizations included the Gödel – Herbrand – Kleene recursive functions of 1930, 1934 and 1935, Alonzo Church's lambda calculus of 1936, Emil Post's " Formulation 1 " of 1936, and Alan Turing's Turing machines of 1936 – 7 and 1939.

* 1930 – Gandhi raises a lump of mud and salt and declares, " With this, I am shaking the foundations of the British Empire.

* 1930 – Manuel Neri, American artist

* 1930 – Michał Życzkowski, Polish technician ( d. 2006 )

* 1930 – Félix Guattari, French philosopher and theorist ( d. 1992 )

* 1930 – Gholamreza Takhti, Iranian wrestler ( d. 1968 )

* 1930 – Judge Joseph Force Crater steps into a taxi in New York and disappears never to be seen again.

* 1930 – Abbey Lincoln, American singer-songwriter and actress ( d. 2010 )

* 1930 – Betty Boop makes her cartoon debut in Dizzy Dishes.

* 1930 – Jacques Parizeau, Canadian economist and politician

* 1930 – Wilfried Hilker, German football referee

* 1930 – Don Ho, American singer and pianist ( d. 2007 )

* 1930 – Bernard Manning, English comedian ( d. 2007 )

* 1930 – Wilmer Mizell, American baseball player ( d. 1999 )

* 1930 – Vali Myers, Australian painter ( d. 2003 )

* 1930 – Cosima Wagner, Hungarian daughter of Franz Liszt and widow of Richard Wagner ( b. 1837 )

* 2012 – Jerry Lynch, American baseball player ( b. 1930 )

Iuliu Maniu ( 1873 – 1953 ) was prime minister with an agrarian cabinet from 1928 to 1930, but the Great Depression made proposed reforms impossible.

1930 ) vol 1 pp 1 – 146 covers many major thinkers down to 1800

* 1837 – Mary Harris Jones, American labor organizer ( d. 1930 )

* 1930 – Lionel Bart, English composer ( d. 1999 )

* 1930 – Pierre Bourdieu, French sociologist ( d. 2002 )

* 1930 – Julie Bovasso, American actress ( d. 1991 )

Mythology of All Races Series, Volume 2 Eddic, Great Britain: Marshall Jones Company, 1930, pp. 220 – 221.

* Order of the Chrysanthemum, 1930: Emperor Showa's second brother, Prince Takamatsu, traveled to Madrid to confer the Great Collar of the Chrysanthemum on King Alfonso.

The Negro National League did well until 1930, but folded during the Great Depression.

For the 1930 season, the Spartans formally joined the NFL as the other area independents folded because of the Great Depression.

Mythology of All Races Series, Volume 2 Eddic, Great Britain: Marshall Jones Company, 1930, 220-221.

The Great Depression led to a substantial downturn in production by Holden, from 34, 000 units annually in 1930 to just 1, 651 units one year later.

Einstein had previously explored this belief that man could not understand the nature of God in an interview published in 1930 in G. S. Viereck's book Glimpses of the Great explaining: I am not an Atheist.

He served as the 11th Prime Minister of Canada from August 7, 1930, to October 23, 1935, during the worst of the Great Depression years.

By defeating William Lyon Mackenzie King in the 1930 federal election, he had the misfortune of taking office during the Great Depression.

Lyons became acting Treasurer in 1930 and helped negotiate the government's strategies for dealing with the Great Depression.

MGM filmed The Great Meadow ( 1930 ) in Realife — however, it's unclear if it was ever released in that widescreen process due to declining interest of the movie-going public.

In 1930, Harry acquired more theaters in Atlantic City, despite the beginning of the Great Depression.

< imagemap > File: 1930s decade montage. png | From left, clockwise: Dorothea Lange's photo of the homeless Florence Thompson show the effects of the Great Depression ; Due to the extreme drought conditions, the farms become dry and the Dust Bowl spreads through America ; The Battle of Wuhan during the Second Sino-Japanese War ; Aviator Amelia Earhart becomes an American national icon ; German dictator Adolf Hitler and the Nazi Party attempted to establish a New Order of absolute Nazi German hegemony in Europe, which culminated in 1939 when Germany invaded Poland, leading to the outbreak of World War II ; The Hindenburg explodes over a small New Jerseian airfield, effectively ending commercial airship travel ; Mohandas Gandhi walks to the Indian Ocean in the Salt March of 1930 .| 420px | thumb

Common use of the phrase " The Great Depression " for the 1930s crisis is most frequently attributed to British economist Lionel Robbins, whose 1934 book The Great Depression is credited with ' formalizing ' the phrase, though US president Herbert Hoover is widely credited with having ' popularized ' the term / phrase, informally referring to the downturn as a " depression ", with such uses as " Economic depression cannot be cured by legislative action or executive pronouncement ", ( December 1930, Message to Congress ) and " I need not recount to you that the world is passing through a great depression " ( 1931 ).

Milton Friedman and Anna Schwartz in their book A Monetary History of the United States, 1867-1960 argued that the Great Depression of 1930 was caused by a massive contraction of the money supply and not by the lack of investment Keynes had argued.

His father, a stockbroker, committed suicide in 1930 after the international crash of the stock market and onset of the Great Depression.

* Great Original Performances, ( 1923 – 1930 ) ( Louisiana Red Hot, 2-CDs, 1998 )

The fourth was between 1930 – 1933 when the rate of deflation was approximately 10 percent / year, part of the United States ' slide into the Great Depression, where banks failed and unemployment peaked at 25 %.

Great Lakes piracy occurred, from 1900 – 1930, on Lake Michigan, through the exploits of " Roaring " Dan Seavey.

In response to the Great Depression, Congress accelerated its protectionist policies, culminating in the Smoot-Hawley Act of 1930.

The unusually wet period, which encouraged increased settlement and cultivation in the Great Plains, ended in 1930.

The Soviet Union's robust film industry came out with its first sound features in December 1930: Dziga Vertov's nonfiction Entuziazm had an experimental, dialogueless soundtrack ; Abram Room's documentary Plan velikikh rabot ( The Plan of the Great Works ) had music and spoken voiceovers.