Since 1926, four parts of the “Opera hactenus inedita Rogeri Baconi” have been issued from the Clarendon Press, and now an English translation of the “Opus Majus” appears, in two large ...

ROGER BACON (1214-1294) produced in 1267 his four-volume Latin encyclopaedic treatise (“Opus Majus”) on the foundations of knowledge, with two supplements dealing with physical science and ...