Book with misguided instrument users (globe, astrolabe, horoscope. Jacobstaff pointed at the heavens).

Book with illustration on left of one man standing, holding the Jacobsstaff properly.

COMPLEAT Books of Knowledge!

Are we doing it right yet? These 17th c. books of secrets with bonus Almanacs and Calendars seem dubious of the reader's ability to use the simplest of scientific instruments! Case B 8635 .84 and Case A 15 .18. @newberrylibrary.bsky.social
#Jacobsstaff #HistoryOfScience