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

* 1800 – The Acts of Union 1800 is passed in which merges the Kingdom of Great Britain and the Kingdom of Ireland into the United Kingdom of Great Britain and Ireland.

Essays in European Economic History, 1500 – 1800, ( 1974 ), translated articles from Annales

* 1800 – George Bingham, 3rd Earl of Lucan, English soldier ( d. 1888 )

* 1761 – Yevstigney Fomin, Russian composer ( d. 1800 )

* 1800 – Hiram Walden, American politician ( d. 1880 )

* 1800 – Ludwig van Beethoven leads the premiere of his First Symphony in Vienna.

* 1800 – Gabriel Prosser postpones a planned slave rebellion in Richmond, Virginia, but is arrested before he can make it happen.

* 1800 – John Appold, British fur dyer and engineer ( d. 1865 )

* 1800 – The United States Library of Congress is established when President John Adams signs legislation to appropriate $ 5, 000 USD to purchase " such books as may be necessary for the use of Congress ".

* 1891 – Helmuth von Moltke the Elder, Prussian field marshal ( b. 1800 )

* 1718 – Hugh Blair, Scottish preacher, author, and rhetorician ( d. 1800 )

The Virginia Report of 1799 – 1800, Touching the Alien and Sedition Laws ; together with the Virginia Resolutions of December 21, 1798, the Debate and Proceedings thereon in the House of Delegates of Virginia, and several other documents illustrative of the report and resolutions

* Calvin Britain 1800 – 1862, American politician from Michigan

It can be produced by compressing other boron phases to 12 – 20 GPa and heating to 1500 – 1800 ° C ; it remains stable after releasing the temperature and pressure.

The T phase is produced at similar pressures, but higher temperatures of 1800 – 2200 ° C.

It has relatively high compressive strength, of about 170 MPa ( 1800 kgf / cm² ) but poor tensile strength of 104 – 121 MPa and very low shear stress strength ( 51. 6 MPa ), meaning it resists pushing forces well, but not pulling or torsional forces.

* Pope Pius VII ( 1742 – 1823, r. 1800 – 23 )

* Powell J., Blakeley D. W., Powell, T. Biographical Dictionary of Literary Influences: The Nineteenth Century, 1800 – 1914.

Chemistry came of age when Antoine Lavoisier ( 1743 – 1794 ) developed the theory of Conservation of mass in 1783 ; and the development of the Atomic Theory by John Dalton around 1800.

El bandolerismo en Cuba ( 1800 – 1933 ).

* Mote, Frederick W. Imperial China, 900 – 1800 Harvard University Press, 1999, 1, 136 pages, the authoritative treatment of the Song, Yuan, Ming, and Qing dynasties ;

In 1800 German scientist Alexander von Humboldt and French botanist Aimé Bonpland explored the river.

* 1800 – War of the Second Coalition: Battle of Hohenlinden, French General Moreau defeats the Austrian Archduke John near Munich decisively, coupled with First Consul Napoleon Bonaparte's victory at Marengo effectively forcing the Austrians to sign an armistice and ending the war.

The crossing of the St. Bernard Pass had allowed the French to surprise the Austrian army and win victory at the Battle of Marengo on 14 June 1800.

* 1800 – Émilie Gamelin, French Canadian Roman Catholic Religious Sister, founder of the Sisters of Providence ( d. 1851 )

* 1800 – Achille Devéria, French painter and lithographer ( d. 1857 )

The development of bleaching powder ( calcium hypochlorite ) by Scottish chemist Charles Tennant in about 1800, based on the discoveries of French chemist Claude Louis Berthollet, revolutionised the bleaching processes in the textile industry by dramatically reducing the time required ( from months to days ) for the traditional process then in use, which required repeated exposure to the sun in bleach fields after soaking the textiles with alkali or sour milk.

* 1800 – The French Army of First Consul Napoleon Bonaparte defeats the Austrians at the Battle of Marengo in Northern Italy and re-conquers Italy.

* 1714 – Marc René, marquis de Montalembert, French engineer and writer ( d. 1800 )

Jean-Jacques Ampère ( 12 August 1800 – 27 March 1864 ) was a French philologist and man of letters.

Napoleon Bonaparte had gained Louisiana for French ownership from Spain in 1800 under the Treaty of San Ildefonso, after being a Spanish colony since 1762.

While the sale of the territory by Spain back to France in 1800 went largely unnoticed, fear of an eventual French invasion spread nationwide when, in 1801, Napoleon sent a military force to secure New Orleans.

* 1800 – Louis Christophe François Hachette, French publisher ( d. 1864 )

* 1716 – Louis-Jean-Marie Daubenton, French naturalist ( d. 1800 )

* 1800 – Henri-Marie-Gaston Boisnormand de Bonnechose French bishop and senator ( d. 1883 )

* 1864 – Jean-Jacques Ampère, French scholar ( b. 1800 )

* 1800 – Marc René, marquis de Montalembert, French military engineer and writer ( b. 1714 )

* 1721 – Joseph de Guignes, French orientalist ( d. 1800 )

After the French Revolution, Napoléon I reorganized the police in Paris and other cities with more than 5, 000 inhabitants on February 17, 1800 as the Prefecture of Police.

In March 1800, Hermann alerted the French scientist George Cuvier to the existence of Collini's fossil, believing that it had been captured by the occupying armies of Napoleon and sent to the French collections in Paris ( and perhaps to Cuvier himself ) as war booty ; at the time special French political commissars systematically seized art treasures and objects of scientific interest.

The Quasi-War was an undeclared war fought mostly at sea between the United States and the French Republic from 1798 to 1800.

Silas Talbot engineered an expedition to Puerto Plata harbor in the Colony of Santo Domingo, a possession of France's ally Spain, on May 11, 1800 ; sailors and marines from the USS Constitution under Lieutenant Isaac Hull captured the French privateer Sandwich in the harbor and spiked the guns in the Spanish fort.