A faint buzz above the ceiling witnessed that petrography, too, was active.
Petrog′lyphy, the art of writing on rocks or stones; Petrog′rapher, a student of petrography.
A more general name sometimes employed is that of petrography.
petrography and laboratory psychology were among the new sciences fostered by the new university.
Thus from mineralogy and petrography it contains information regarding the origin and subsequent mutations of minerals and rocks.