the visual pictorial evidence of the lenox globe supports this corrosion effect as it does not portray any green or black patina. no other extant bibliographical chemical evidence from the mixing of arsenic into copper as a corrosion inhibitor during the renaissance in florence is documented. the yellow brass globe jagellonian of french origin with a 7.35 cm diameter, part of an astronomical clock in kraków dating from c. 1510, is based on the cartographic knowledge of the older lenox globe.