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 Science in the 19th Century

The 19th century was an age of reason and discovery when many long-held theories were overturned as scientific advances enabled an ever-closer analysis and record of life and matter. Here are just some of the century’s scientific landmarks.

1803-1808 John Dalton develops his atomic theory, publishing New System of Chemical Philosophy. Dalton’s theory stipulated that all gases were made up of atoms, the heavier the gas, the heavier were its atoms, and that atoms of one type were attracted to one another. According to Dalton, chemical reactions separated or reunited these elementary particles; no new matter was created or destroyed.
1803 Giovanni Aldini, nephew of the Italian anatomical experimenter Luigi Galvani, published in London: An Account of the late Improvements in Galvanism, with a series of curious and interesting experiments performed before the Commissioners of the French National Institute, and Repeated lately in the Anatomical Theatres of London. To which is added an appendix containing experiments on the body of a malefactor executed at Newgate…
Galvani had developed techniques (galvanism) of applying electric currents to stimulate muscular movement in an effort to reanimate corpses.
1809
1815-22
Lamarck publishes La Philosophie Zoologique
Lamarck publishes L’Histoire naturelle des animaux sans vertèbres in seven volumes. His work is important in the development of theories of evolution.
1831 Creation of the British Association for the Advancement of Science.
1837-38 Physicist Michael Faraday undertakes ground-breaking research into electromagnetism and a theory of electricity.
1848 Creation of the American Association for the Advancement of Science.
1779-1848 Jöns Jakob Bezelius devises a shorthand for chemistry, whereby the atom of each element is represented by the first letter(s) of its name.
1776-1856 Amedeo Avogadro’s research into atomics leads to the coining of the term ‘molecule’, used now to designate a group of atoms.
1850s on In the second half of the 19th century the improvement of microscopes enabled the development of cellular theory (by which all tissues, organs, living matter are shown to be made up of cells) and the eventual discovery of the ‘chromosome’.
1859 Charles Darwin’s The Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life appears at the end of November. All copies of the first edition are sold on the day of publication.
1861 Pasteur publishes Mémoire sur les animalcules vivant sans oxygène libre et déterminant des fermentations, following research into the existence of micro-organisms in the air. The German scientist, Ferdinand Cohn, coins the term of ‘bacillus’ or “germ” for these micro-organisms. Pasteur’s work leads to the development of pasteurisation (by heating milk to 65 degrees any germs present are destroyed and the milk will not turn sour) as well as the discovery of vaccinations against certain bacterial infections.
1867 Lister’s work on asepsis leads to the discovery that a vaporised solution of carbolic acid can destroy bacteria in the air, without damaging body tissues. The use of this technique in operating theatres leads to a significant drop in post-operatory death due to infection.
March 1818 The Shelleys leave England for Italy, where they will remain until Shelley's death. They visit Byron in Venice, but baby Clara dies during their stay there.
1873 James Clerck Maxwell publishes his famous Treatise on Electricity and Magnetism.
1818-89 James Joule develops a modern theory of heat.
1825-93 Jean Martin Charcot, founds the famous ‘Ecole de neurologie de la Salpêtrière’. His classes are followed by Freud amongst others. He demonstrates the link between lesions in certain parts of the brain and motor difficulties, as well as developing the use of hypnotism.
1910 Sigmund Freud founds the International Psychoanalytical Association.


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