matchup/kept apart only by lunch

This matchup of two kinds of instruction, book by book and day by day for four years, kept apart only by lunch, is a perfect example of the separation and coexistence of the two cultures that was [sic] characteristic of the Cambridge curriculum in Francis Bacon’s day.

--Joseph M. Levine, Humanism and History: Origins of Modern English Historiography

[Don't read this book, just this sentence. Don't worry about the entirety of this sentence, just the six words from this post's title. The rest of these words just enable this sextet.]