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Salty and pungent, neutral in nature, slightly toxic.

[Invention] This substance is formed by sensing the qi of lead, silver, and saltpeter. Its nature is heavy and sinking, directly entering the Lower Jiao (the lower burner of the Sanjiao), thus it can descend phlegm, arrest malaria, and treat carbuncles and swellings. For symptoms where fright causes pathogenic qi to enter the Pericardium (the protective membrane surrounding the heart), resulting in aphonia and inability to speak, take one bi (an ancient unit of measure, approx. a spoonful) of Mituosen powder, mix with tea water, and ingest to achieve cure. Fright causes qi disorder; using heavy sedatives removes timidity and soothes the Liver. However, upon ingestion, it induces nausea due to its yin-toxic nature damaging Stomach qi. The *Shenghui Fang* records treating nasal erythema (rosacea) by finely grinding Mituosen, mixing with human milk, and applying at night. The *Danfang* treats early-stage back carbuncles by quenching in vinegar seven times, mixing with tung oil, and applying around the affected area to dissipate. Combined with Alum, it treats tinea versicolor and body odor; combined with Chinese Gall, it dyes whiskers; combined with Eagle Droppings White, it eliminates scars; when ground with water and ingested, it resolves arsenic and sulfur toxicity.

Pungent, cold in nature, slightly toxic.

[Invention] Tin is the mother of Arsenic; therefore, newly manufactured tin vessels should not hold wine overnight. When making bottles for storing medicine, old tin mixed with lead is preferred. In the past, individuals who drank excessive distilled spirits and fell into a coma nearing death were treated by having them store boiling water in a tin vessel, covering it, and drinking the condensed steam vapor, which would revive them. This is no different from using a single cloth during cooking to treat burns from steam scalds; it relies on the power of similar qi interacting.

Pungent, cold in nature, toxic. It refers to the fragments bursting off an anvil when iron is heated until red-hot and boiling. It is used after being heated red-hot in an iron pot and quenched in vinegar seven times.
The *Shennong Bencao Jing* states it governs foul sores, ulcers, crusts, and scabies caused by wind-heat, located within the skin.

[Invention] The *Suwen* states: "For those suffering from anger-induced mania, treat with a drink made from Shengtieluo." Soak the juice and decoct herbs with it, utilizing its heavy and sinking nature to descend qi most rapidly. Do not overdose, as excessive use causes shivering aversion to cold because it exclusively depletes Yang qi. The *Shennong Bencao Jing* states it governs wind-heat foul sores and other diseases, all caused by Liver and Heart fire; its pungent-cold nature clears heat from these two meridians. Su Gong fried it until hot and threw it into wine to treat Zefeng Jingbing (spastic disease caused by thief-wind/pathogenic wind), borrowing the wine to circulate qi within the skin.

Sour and pungent, non-toxic. It is the fine powder produced by needle craftsmen grinding iron.

[Invention] Zhensha is cold and descending, excellent for treating Spleen labor jaundice caused by damp-heat. Heat it red-hot in an iron pot, quench with vinegar, place in a shady spot for half a month. Once accumulations form and its original iron nature is eliminated, it becomes a specific medicine for resolving hard accumulations in the Spleen and Stomach and treating jaundice and edema. It is used in Danxi's Wenzhong Wan. Additionally, one liang of processed Zhensha, combined with half a qian of Dry Lac ash and three qian of Cyperus Rotundus, mixed with five qian of Pingwei San, formed into pills using steamed dough, and taken with decoction or wine, yields therapeutic effects indistinguishable from Wenzhong Wan.