Stephanie Leitsch is teaching the 44th International Wolfenbüttel Summer Course, entitled “Early Modern Visual Data: Organizing Knowledge in Printed Books.”
As prints taught viewers how to observe and thus arguably democratized knowledge derived from first-hand experience, this seminar considers printed images as critical visual technology that built knowledge acquisition. . . .
In Elizabethan London, one of the more surprising things a wealthy owner of a beautifully illustrated folio volume could do was to take a sharp knife and cut it to pieces. John Blagrave’s 1585 Mathematical Jewel, in fact, demands nothing less. This work, which introduced an elaborate instrument of Blagrave’s design for performing astronomical calculations, included woodcuts that were specifically provided in order to be cut out and used as surrogates for the brass original:
get very fine pastboord made of purpose, and then spred your paste very fine thereon, & quickly laying on this picture & clappe it streight into a presse before it bee thorowe wette with the paste (fol. ¶6v)
The earliest extant Chinese mathematical writings include two types of components of particular interest for our discussion on manuals and handbooks. On the one hand, there are mathematical problems that often evoke tasks carried out by officials working in the imperial bureaucracy. On the other hand, there are mathematical “procedures,” or “algorithms” in today’s parlance, to solve such problems. This description fits most of the mathematical books composed in China until the seventh century.
On November 4, 1646, Sir Theodore de Mayerne (1573–1655), first physician to Charles I and the English Aristocracy, decided to spend his day away from his demanding patients and to devote his attention to the vibrant world of colors. He took a good handful of bilberries and carefully inspected the color of their peel and pulp. He then cooked them following a recipe for making a “very beautiful and very oriental” colorant for writing and limning. The recipe he followed has survived as part of an extensive manuscript collection dated to the first half of the seventeenth century.
In premodern China, the population was roughly divided according to professions into four groups: literati, farmers, artisans, and merchants. During this period, artisanal knowledge was mainly transmitted in person. Most Chinese artisans were not as literate as their European counterparts, if literate at all, and written texts played a minor role in the transmission of their specialized knowledge. The master of a workshop taught the apprentices how to perform bodily actions by working alongside them and only transmitted written knowledge with brief and codified texts. Sometimes craft recipes were not even written down; they were memorized by masters and transferred verbally to designated successors in the craft. 
In 1646, the English polymath John Wilkins (1614–1672) published his popular guidebook for preaching, Ecclesiastes, but it was not the first “Discourse Concerning the Art of Preaching” with that name. Over a century earlier, in 1535, the renowned humanist Desiderius Erasmus (1466–1536) wrote a treatise with the same title in hopes of reforming a clergy whose faults he had spent his career caricaturing and condemning. Erasmus’s own title referred further back still, evoking the book of the Bible in which a “preacher” (rendered from the Latin ecclesiastes) offers advice for good living in a fallen world.
In early modern Japan, the study of nature, known at the time as honzōgaku, was primarily a bookish enterprise. The work of scholars who studied rocks and minerals, herbs and plants, flowers and trees, insects and fish, birds and animals—or, as they collectively called them, “myriads of things” (banbutsu) or “herbs-trees-birds-beasts-insects-fish-metals-jewels-grounds-stones” (sōmokukinjūchūgyokingyokudoseki)—began and ended with books. Canonical encyclopedias like Li Shizhen’s Bencao gangmu (Honzō kōmoku in Japanese editions) and Kaibara Ekiken’s Yamato honzō served not only as foundations of scholars’ research and repositories of institutional knowledge but also as the ultimate source of legitimation for their claims on nomenclature, taxonomy, morphology, and aspect as well as for the pharmacological, gastronomical, agricultural, and aesthetic use of plants and animals.
Learning how to ride a horse has always been a tricky business. Xenophon pondered it in the fifth century BCE. So did the famous Renaissance riding master Federico Grisone. Even today, book shops have plenty of titles on learning how to ride (Figure 1). To put it a bit bluntly, riding a horse is about more than just sitting on a creature that moves. Unlike walking a dog or hunting with a hawk, horse riding is not only an activity shared by a human and an animal actor but entails actual co-movement. Whereas a dog or a falcon is instrumentally conditioned to fulfill a specific function according to human commands, horse riding is a physically shared co-activity based on (ideally) harmonious movement.
In 1727, fourteen men and women stood trial before the court of Basel for alleged treasure hunting. There was a rumor that some of them had attempted to find hidden treasures by performing nocturnal ceremonies to conjure spirits that could uncover and release the concealed money. Jacob Schaffner, a shoemaker, stated on record that he had obtained his knowledge of how to conjure spirits from a book he had bought from a Saxon some time ago. Said man supposedly received the book from a Venetian. Another man stated that he had come into possession of this book and copied various parts of it with his friends. This is just one of the many stories that can be found in early modern court documents about treasure hunters trying to conjure spirits. Such handbooks became the center of attention at such trials as the authorities were eager to track them down and place them in safe custody.
The early modern household was a bustling site for a range of medical activities from self-diagnosis and medication to nursing and caring for the sick to drug production. To further their knowledge about medicine and the body, householders accessed a wide variety of sources. Many turned to their family and friends for health-related advice, consulted medical practitioners of various sorts, and avidly read the abundance of printed medical books offered by contemporary book producers. By the mid-seventeenth century, the bookshops near St. Paul’s in London were stocking an astonishing array of English medical books. Readers could pick and choose from an assortment of herbals, pharmacopoeias, general medical guides, surgical handbooks, midwifery manuals, regimens, medical recipe books, and more. These texts were eagerly consulted by householders, who utilized the knowledge contained therein not only for their home-based medical activities but also as a way to inform their decisions as actors in medical encounters with practitioners of all sorts.