books to be chewed
Some books are to be tasted, others to be swallowed, and some few to be chewed and digested: that is, some books are to be read only in parts, others to be read, but not curiously, and some few to be read wholly, and with diligence and attention. --- Francis Bacon. (1625). "Of Studies"
I introduce the quote in (4.1.1.6) Gradation between "Finding" and "Assembling"