** 412. 13 Free-reed instruments feature a reed which vibrates within a closely fitting slot ( there may be an attached pipe, but it should only vibrate in sympathy with the reed, and not have an effect on the pitch – instruments of this class can be distinguished from 422. 3 by the lack of finger-holes ).

** 422. 11 ( Single ) oboes.

** 422. 12 Sets of oboes.

** 422. 21 ( Single ) clarinets.

** 422. 22 Sets of clarinets.

** 422. 32 Double pipes with free reeds.

** Okayama Prefectural Route 422 ( Hiruzen Kōgen )

** Okayama Prefectural Route 422 ( Hiruzen Kōgen )

** Order 2009-8-6 ( August 11, 2009 ): re-selecting Mesaba Aviation, Inc., d / b / a Delta Connection, to provide Essential Air Service ( EAS ) with Saab 340 aircraft at Devils Lake and Jamestown, North Dakota, for the two-year period of October 1, 2009, through September 30, 2011, for annual subsidy rates of $ 1, 459, 493 at Devils Lake and $ 1, 963, 220 at Jamestown ($ 3, 422, 713 annually for both points combined ).

** Order 2009-8-6 ( August 11, 2009 ): re-selecting Mesaba Aviation, Inc., d / b / a Delta Connection, to provide Essential Air Service ( EAS ) with Saab 340 aircraft at Devils Lake and Jamestown, North Dakota, for the two-year period of October 1, 2009, through September 30, 2011, for annual subsidy rates of $ 1, 459, 493 at Devils Lake and $ 1, 963, 220 at Jamestown ($ 3, 422, 713 annually for both points combined ).

** BR Class 422 buffet coaches 69310 ( ex-unit 2255 ) and 69332 ( ex-unit 2203 ).

** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Well-ordering theorem: Every set can be well-ordered.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** Trichotomy: If two sets are given, then either they have the same cardinality, or one has a smaller cardinality than the other.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Every surjective function has a right inverse.

** Zorn's lemma: Every non-empty partially ordered set in which every chain ( i. e. totally ordered subset ) has an upper bound contains at least one maximal element.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** Tukey's lemma: Every non-empty collection of finite character has a maximal element with respect to inclusion.

** Antichain principle: Every partially ordered set has a maximal antichain.

** Every vector space has a basis.

** Every unital ring other than the trivial ring contains a maximal ideal.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** The closed unit ball of the dual of a normed vector space over the reals has an extreme point.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** August 31 ( Eastern Orthodox liturgics )

** Zoram: the Apostate Nephites religious ( see Alma 31 )

** Panama ( July 31, 1973, renegotiated and expanded for ( January 1, 2009 )

** registered in other countries: 31

** Bentenjima, Wakkanai, Hokkaidō – 45 ° 31 ' 35 ″ N, 141 ° 55 ' 09 ″ E

** January 31 ( Eastern Orthodox liturgics )

** May 31 ( Eastern Orthodox liturgics )

** March 31 ( Eastern Orthodox liturgics )

** October 31 ( Eastern Orthodox liturgics )

** 31 July 1945 – 8 June 1946: Hans Neureuther, Non-party

** Episode 31 " How To Die For Nothing " ( Writer )

** Episode 31 " The Kidder " ( Writer )

** Type U 19, Type U 23, Type U 27, Type U 31, Type U 43, Type U 51, Type U 57, Type U 63, Type U 66, Type Mittel U

** Futurama: The series ' protagonist, Fry, is accidentally cryogenically frozen on December 31, 1999.

** The Family Guy episode " Da Boom " is set on December 31, 1999.

** Major League Soccer kicks off in front of an overflow crowd of 31, 683 packed in Spartan Stadium, to witness the historic first game.

** Joseph Kittinger parachutes from a balloon over New Mexico at an aititude of about 102, 800 feet ( 31, 333 meters ).

** The Soviet Union executes 31 people for alleged Trotskyism.

** Sniper Charles Whitman kills 13 people and wounds 31 from atop the University of Texas at Austin Main Building tower, after earlier killing his wife and mother.

** An earthquake in the city of Tuscania, Italy kills 31.

** The King's Cross fire on the London Underground kills 31.

** the area of a square with side 31. 6 m.

** December 31, 870 – Englefield

** December 31 – at the battle of Harenc, the crusaders defeat the troops from Aleppo trying to come to the relief of besieged Antioch.

** Weight: 14. 2 kg ( 31. 3 lb )