Encyclopedia, epidemic, and critique

What changes when publishing is cheap and the apothecary receives goods from another continent.

The commercial workshops of the lower Yangtze printed to sell, not for the court: household encyclopedias, illustrated manuals, rhymed digests, and formula catalogues within reach of a middling reader. At the same time maritime trade introduced maize, sweet potato, peanut, chilli, and tobacco, which within a few generations entered both the diet and the apothecary’s stock. A tradition that believed itself closed had to make room for materials no classic had ever mentioned.

That double movement explains the encyclopedic bent of the period. In the early fifteenth century the Puji Fang gathered more than sixty thousand formulas; in 1742 the Qing court had the Yizong Jinjian compiled as the official syllabus of the imperial medical academy. Compiling stopped being an act of preservation and became an act of selection: whoever decides the table of contents decides which part of the tradition goes on being taught.

• Commercial printing multiplies the reading public beyond the officialdom.
• American plants enter the diet and the materia medica within a few generations.
• The Puji Fang (c. 1406) and the Yizong Jinjian (1742) mark the commercial and official poles.
• To compile is to exclude: an encyclopedia’s index is a doctrinal decision.

Bencao 本草 “Roots and herbs”. The genre of Chinese materia medica: catalogues of plant, animal, and mineral substances with description, synonyms, and provenance. The Bencao Gangmu is its organizational summit.

Why the outbreaks of the sixteenth and seventeenth centuries forced a rethink of causation.

The end of the Ming concentrated drought, famine, civil war, and waves of epidemic that emptied whole districts. The physicians who attended them held a framework built mainly around cold damage, and found it did not account for what they saw: outbreaks appearing out of season, spreading by contact, and not answering to the expected treatment. That pressure of experience, not a debate among scholars, is the origin of the current of heat disorders.

In parallel, variolation is documented from the sixteenth century: powdered smallpox scabs introduced through the nose to produce a mild, protective episode. The Qing court promoted it in the seventeenth century. It is a preventive practice earlier than Jenner’s vaccination, though the exact route by which inoculation reached Europe in the eighteenth century remains debated, and the method adopted in Britain came from the Ottoman world.

• The epidemic crises of the seventeenth century put the classical framework to a practical test.
• The wenbing current comes out of that, not out of a prior academic quarrel.
• Nasal variolation is documented in China from the sixteenth century.
• It is a historical antecedent of inoculation, not the equivalent of a modern vaccine.

Wenbing 温病 “Heat disorders”. A family of febrile presentations that this current holds to be different in nature from the cold damage of the Shang Han Lun, with their own route of entry and progression.

What Li Shizhen’s work actually solved, and what kind of book it is not.

Before 1596 the materia medica was arranged mostly by therapeutic rank, inherited from the Shennong Bencao Jing: upper, middle, and lower. Li Shizhen replaced that criterion with one based on the nature of the material — waters, earths, minerals, herbs, grains, insects, fish, birds, beasts, human — split into sixteen sections and sixty categories. Each entry separates name, synonyms, provenance, description, preparation, and attributed uses, so an inherited claim can be traced back to its source.

The work also carries entries of popular origin and reports the author himself marks as doubtful, and it preserves material from traditions that today are plainly ineffective or dangerous. That is not carelessness: Li Shizhen’s rule was to record and annotate the source rather than delete it. Reading it as a current pharmacopoeia is a category error; it is a reasoned historical inventory, and that is how the 2011 UNESCO Memory of the World inscription treats it.

• It replaces classification by therapeutic rank with a taxonomy by nature of the material.
• Sixteen divisions (bu) and sixty categories (lei) organize some 1,900 substances.
• Each entry distinguishes source, description, preparation, and attributed uses.
• It deliberately includes doubtful material, marked as such by the author.

Gangmu 纲目 “Master net and mesh”: a system of general headings subdivided into sections. It names the hierarchical classification method that gives the work its title.

How an alternative framework for fevers was built over a century and a half.

The sequence has three stages. In 1642 Wu Youxing proposes a pestilential agent penetrating through mouth and nose rather than the body surface. A century later Ye Tianshi orders the progression of fevers into four ever-deeper levels — wei, qi, ying, xue. In 1798 Wu Jutong reorganizes that material by the three jiao, upper, middle, and lower, and produces the treatise that makes the doctrine teachable. Each step pushes the explanation a little further from the cold-damage model.

The result was a lasting doctrinal split between adherents of the Shang Han Lun framework and the school of heat, with intermediate syntheses such as Wang Mengying’s in the mid-nineteenth century. It is worth stressing what this debate is and is not: a historical argument about how to classify and explain febrile presentations with the means of the day, not a set of indications. None of these authors had microbiology or present-day evaluation criteria.

• Wu Youxing (1642): the pestilential agent li qi, entering by mouth and nose.
• Ye Tianshi (1667–1746): progression through the four levels wei, qi, ying, and xue.
• Wu Jutong (1798): reorganization by the three jiao in a systematic treatise.
• The cold/heat controversy structures teaching for the next two centuries.

Li qi 疠气 “Pestilential qi”. The specific causal agent posited by Wu Youxing, distinct from climatic factors, transmissible, and with an affinity for particular species and organs.

How to handle the period’s internal critique without turning it into propaganda either way.

Wang Qingren is the best evidence that the tradition could correct itself: he opened the anatomical debate by observing rather than citing, and did so before Western medicine had any real presence in the country. He is also the best evidence of its limits, because his own plates contain significant errors. Holding both at once is exactly what reading the period well demands, and it heads off the two usual temptations, apology and contempt.

From 1842, with the ports open, missionaries and foreign doctors set up hospitals and translate manuals, and for the first time the two systems are compared daily on the same ground. Travelling the other way, the Latin term acupunctura already appears in 1683 in the work of a Dutch physician who had observed the practice in Japan. None of this historical material is health guidance: for any persistent or severe symptom the reference is current medical assessment.

• Wang Qingren corrected by direct observation and still got part of it wrong.
• Empirical criticism arises inside the tradition, not as a reaction to the West.
• After 1842 missionary hospitals make the comparison between systems visible.
• These texts are historical documents, not sources of indications or dosages.

Yi’an 医案 A collection of annotated clinical cases. A central genre of the period: it records a physician’s concrete decisions and lets a reader judge the reasoning, not just the doctrine.