How do you find books of secrets or early alchemical texts in Columbia's collections? (Visual instructions below).
Columbia has one print edition of Hugh Platt's The Jewel House of Art and Nature (1653), held in RBML.
The same edition from 1653 is also available online.
There are several editions of Alessio Piemontese's Book of Secrets (1555) available at Columbia.
English editions (all online)
Latin editions (all in print)
Italian editions (all in print)
Columbia also has several editions of Vannoccio Biringuccio's Pirotechnia (1540), including 2 copies of the 1st edition!