Chemistry during the 19th Century ( 1801 A.D. - 1900 A.D.).

1803 A.D.

John Dalton originates atomic theory, calculating some atomic weights adn inventing chemical symbols. This revolutionary theory is publishes in 1808 under the title "New System of Chemical Philosophy."

1806 A.D.

Experiments on electrolysis lead Sir Humpry Davy to sate the electro-chemical theory.

1808 A.D.

The law of gaseious volume is stated by Joseph Gay-Lussac.

1811 A.D.

Avagadro proprses his theory of molecules, which is vehemently discussed in scientific circles, only being confirmed in modern chemistry.

1818 A.D.

Table of atomic weights is published by Jons Berzelius. It is revised in 1826 and 1833.

1823 A.D.

Simultaneous discovery of isomerism by Liebig and Woehler.

1828 A.D.

Birth of organic chemistry with Woehler's fabrication of an artificial urea.

1832 A.D.

Michael Faraday begins his important work on electrolysis.

1838 A.D.

A general definition of a radical is made by Liebig.

1853 A.D.

Resarch by Henry Roscoe lays the foundation for quantitative photochemistry.

1856 A.D.

New dyes synthesises by William Perkin, Sr. from coal tar. Bessemer's converter revolutionises iron smelting process. Industries boom as a result of chemical progress.

1858 A.D.

Friedrich Kekule defines the concept of valency, and with Couper discovers the tetravalent quality of carbon.

1866 A.D.

Kekule propunds his theory of the molecular structure of benzene.

1867 A.D.

Alfred Nobel invents dynamite and nitroglycerine.

1869 A.D.

The periodic law is put forward by Dmitri Mendeleev and simultaneously and independently by Julius Meyer.

1876 A.D.

The American Willard Gibbs publishes the phase rule, which is later put into practical aplication by Hendrich Roozeboom.

1877 A.D.

The synthesis of amyl-benzene encourages production of dyes and pharmaceutical products.

1893 A.D.

Henri Moisson produces artificial diamonds in his celebrated electric furnace.

1898 A.D.

Discovery of radium by Pierre and Marie Curie.

1900 A.D.

Svante Arrhenius introduces the concepts of ions.