Noun
English scientist and Franciscan monk who stressed the importance of experimentation; first showed that air is required for combustion and first used lenses to correct vision (1220-1292)
Source: WordNetGunpowder was known to Roger Bacon and Albertus Magnus about 1250, but... I conclude that both obtained a knowledge of it from Arabic sources. J. R. Partington
Among the voluminous writings of Roger Bacon is a tractate De arte memorativa. Source: Internet
Davies (2009:24) However, there were those who did not believe this; for instance, the Franciscan friar Roger Bacon (c. 1214–94) stated that books falsely claiming to be by ancient authors "ought to be prohibited by law." Source: Internet
In the 13th century, Albertus Magnus and Roger Bacon were the most notable of these, their work summarizing and explaining the newly imported alchemical knowledge in Aristotelian terms. Source: Internet
His superiors wanted him to synthesize the work of Euclid, Alhazen, Vitello, Roger Bacon and others. Source: Internet
Bios. 75 (2): 78-84 * 1267 Roger Bacon explains the principles of the lens and proposes the idea of telescope and microscope. Source: Internet