. Pennsylvania Museum Bulletin. Number 18, April 1907. hat the work isa collection of old receiptsto which from time to timeadditions have been made,and that Marcus himself isa myth. Far more interestingin every way is the claim ofFriar Roger Bacon (1214?to 1294), The AdmirableDoctor, a Franciscan ofOxford, with most liberalviews on the subject ofheresy and alchemy, a manwho ranked, outside ofMoorish Spain, as the mostillustrious scientist of hisday. His Epistola deSecretis Operibus Artis etNature de Nullitate Ma-jise is thought to havebeen written before of the work on ac-count of t

---

. Pennsylvania Museum Bulletin. Number 18, April 1907. hat the work isa collection of old receiptsto which from time to timeadditions have been made,and that Marcus himself isa myth. Far more interestingin every way is the claim ofFriar Roger Bacon (1214?to 1294), The AdmirableDoctor, a Franciscan ofOxford, with most liberalviews on the subject ofheresy and alchemy, a manwho ranked, outside ofMoorish Spain, as the mostillustrious scientist of hisday. His Epistola deSecretis Operibus Artis etNature de Nullitate Ma-jise is thought to havebeen written before of the work on ac-count of the magnitude ofthe secrets in it, as Baconexplains, is written accord-ing to some cryptic method,because, as he goes on toexplain, it is madness tocommit a secret to writing, unless it be so done as to , THE earliest contemporaneous drawing of a to be unintelligible to the ig- gatling gun norant, and onlv just intclli- 39° t0 4°° gible to the best educated. From the original mMUcr,P*in the Ro^al Library Munich (By courtesy of The Mount Airy World). 24 BULLETIN OF THE PENNSYLVANIA MUSEUMpennsylvaniamuse18penn

---

Size: 1359px × 1838px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, bookpublisherphiladelphiapapenn