The New Organon (Latin: Novum Organum) is a Latin treatise on scientific method by Francis Bacon (1561-1621). Published in 1620, it was intened to form form part of a greater work which was never completed, the Instauratio Magna. Its title reflects Bacon's critique of ways thinking influenced by Aristotle's Organon, which he sought to replace with the experimental method and inductive reasoning.
Free online texts
Bartleby: The New Organon Or, True Directions Concerning the Interpretation of Nature. English translation by James Spedding, Robert Leslie Ellis and Douglas Denon Heath. HTML format.
Early Modern Texts: The New Organon, adapted and translated into more modern English, by Jonathan Bennett. PDF format.
Gutenberg: Novum Organum; Or, True Suggestions for the Interpretation of Nature, translated by Joseph Devey. Multiple formats.
Hanover College: Novum Organum. English translation by Basil Montague (1854). HTML format.
Internet Archive: The Works of Francis Bacon, Vol IV (1858). Multiple formats.
Latin Library: Novum Organum. Latin text. HTML format.
Liberty Fund: Novum Organum. English translation by Joseph Devey. Multiple formats.
University of Adelaide: The New Organon, translated by James Spedding, Robert Leslie Ellis, and Douglas Denon Heath (1863). Multiple formats.
BBC Radio 4 In Our Time: Baconian Science. Melvyn Bragg with Patricia Fara, Stephen Pumfrey and Rhodri Lewis.
Internet Encyclopedia of Philosophy: Francis Bacon (1561 -1626).
Librivox: The New Organon - public domain audiobook.
PhilPapers: Francis Bacon - open access papers.
Stanford Encyclopedia of Philosophy: Francis Bacon.
Wikipedia: Novum Organum
YouTube/60 Second Philosophy: The New Organon overview.
Further reading at Tom's Learning Notes
John Aubrey: Brief Lives - includes a life of Bacon.