Practical Kabbalah and Practical Knowledge: Kabbalistic Manuals and Natural Knowledge in Early Modern East-Central Europe

An impressive handwritten codex at the National Library of Israel embodies the intricacies and peculiarities of crafting, reading, and transmitting practical knowledge in early modern Jewish contexts. The volume, known today as manuscript NLI 8º 1070, was likely produced in the 1730s somewhere in the Polish territories. A variety of local Polish-Ashkenazi traditions are well attested throughout the codex: vernacular and elite, theoretical and practical, of Jewish and Christian provenance, and transmitted mainly in Hebrew and Yiddish, but with elements of Latin, German, Polish, Russian, and Ruthenian. Continue reading “Practical Kabbalah and Practical Knowledge: Kabbalistic Manuals and Natural Knowledge in Early Modern East-Central Europe”

Practical Knowledge and Inner-German Migration

But within a week I’d already found work.
—Herr Winter
 

Citizens of the German Democratic Republic (GDR) who moved to the Federal Republic of Germany (FRG) in the 1980s later incorporated their migration experience into their biographies as success stories. When they relocated, they were between thirty and forty years old and had families. They migrated at a point in their lives when they had already acquired a lot of practical knowledge, if through experience in a different context. Their relocation was about much more than a change of residence, however. GDR citizens also had to come to terms with a new political system, bureaucracy, and society.[1] What practical knowledge could they use to master their new situation? How did they experience their initial encounters with the new system, their search for employment, and their children’s education? Continue reading “Practical Knowledge and Inner-German Migration”

Knowledge Notes

More than a Manual: Early-Modern Mathematical Instrument Books

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.[1] 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)

Continue reading “More than a Manual: Early-Modern Mathematical Instrument Books”

Learning to Demonstrate the Spirit in English Practical Divinity

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. Continue reading “Learning to Demonstrate the Spirit in English Practical Divinity”

‘A Few Plain Instructions for Collecting’: Nineteenth-Century Botanical Collection Manuals in the Service of Empire

Writing in 1849 from their Admiralty chambers right off of Whitehall, the Lords Commissioners of the Royal Navy issued a simple memorandum to introduce their new Manual of Scientific Enquiry, a mutable collecting reference reworked and reissued six more times over the course of the century. “Their Lordships do not consider it necessary that this Manual should be one of very deep and abstruse research,” they noted, arguing that “its directions should not require the use of nice apparatus and instruments: they should be generally plain, so that men merely of good intelligence and fair acquirement might be able to act upon them; yet, in pointing out objects, and methods of observation and record, they might still serve as a guide to officers of high attainment.”[1] Pointing to what they considered the most important areas of research conducted overseas, the Lords Commissioners tasked fifteen of Britain’s top men of science with writing short, simple, and clear instruction booklets for naval officers, sailors, surgeons, and those elusive “professional collectors” on how and what to observe while safely bringing specimens (living and dead), notes, and records back home. Continue reading “‘A Few Plain Instructions for Collecting’: Nineteenth-Century Botanical Collection Manuals in the Service of Empire”

The Theorist’s Doctrine and the Collector’s Technique: On The Historicity of Expertise in Microbiology

How does an expert transmit expertise? What genres of scientific writing are available for doing so? Does the choice of genre matter in the long run? In this essay, I approach these questions by comparing two monographs published in the mid 1940s in the field of microbiology. While the works shared a concern with life at its smallest, they were written in different genres. One, entitled L’évolution physiologique: étude des pertes de fonctions chez les microorganismes, was a general survey of research on microbial nutrition.[1] The other, called Pure Cultures of Algae: Their Preparation and Maintenance, was a manual of techniques for cultivating microscopic algae in test tubes.[2] Continue reading “The Theorist’s Doctrine and the Collector’s Technique: On The Historicity of Expertise in Microbiology”