Opus Tertium by Roger Bacon

A compact supplementary treatise that expands and clarifies themes from his larger manifesto, advocating reform of learning through rigorous study of languages, logic, mathematics and especially experimental investigation; it emphasizes optics and practical sciences, outlines methods for observation and experimentation, and proposes improvements to education and ecclesiastical instruction. The work defends empirical inquiry against scholastic pedantry and points to technological applications and practical inventions as natural outcomes of disciplined study.

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