〔 曰〕凡用以面裹煨熟，磨去粗皮，烂捣，再乳细如面，方堪入药。〔 曰〕每五两
用盐半分，同东流水入瓷器内煮一伏时，捣末研粉。再用五花皮、地榆、阿胶各十两，以东
流水
今方
〔震亨曰〕用蛤蜊烧 成粉，不入煎剂。〔时珍曰〕按吴球云∶凡用蛤粉，取紫口蛤蜊
壳，炭火 成，以熟栝蒌连子同捣，和成团，风干用，最妙。
〔日华曰〕凡用，取陈久者炭火 赤，米醋淬三度，出火毒，研粉。
〔 曰〕凡入药，烧过用。〔 曰〕凡使，勿用花虫壳，真相似，只是无效。贝子以蜜
醋相对浸之，蒸过取出，以清酒淘，研。
〔 曰〕珂，要冬采得色白腻者，并有白旋水文。勿令见火，即无用也。凡用以铜刀刮
末研细，重罗再研千下，不入妇人药也。
〔 曰〕凡使，用生茅香、皂角同煮半日，石臼捣筛用之。〔经验方曰〕凡使，用黄泥
同水
〔颂
出，
三复
硬，
香，
兖
〔时珍曰〕两旁曰牙，当中曰齿。入药烧用。《钱氏小儿方》云∶“用人牙烧存性。入麝
香
或青紫，或变黑，用人齿脱落者，不拘多少，瓦罐固济， 过出火毒，研末用。”
〔大明曰〕腊月截淡竹，去青皮，纳粪中，浸渗取汁，治天行热疾中毒，名粪清。〔弘
景曰〕以空罂塞口，纳粪中，积年得汁，甚黑而苦，名为黄龙汤，疗温病垂死者皆瘥。
[Li Shizhen said] When used as medicine, wrap it in flour and roast until cooked. Grind off the rough skin, mash it thoroughly, and then grind it into a fine powder resembling flour before it is suitable for medicinal use. [An unnamed physician said] For every five liang of material, use half a fen of salt, place it together with flowing water from the east in a porcelain vessel, and boil for one fu shi (a traditional time unit, approx. 2 hours). Then crush and grind into powder. Further use ten liang each of Wuhua Pi (Bark of Five-Flower Tree), Diyu (Sanguisorbae Radix), and Ejiao (Donkey-hide Gelatin), with flowing water from the east... (original text has gaps, modern prescription)
[Zhu Zhenheng said] Use clam shells calcined into powder; do not use in decoctions. [Li Shizhen said] According to Wu Qiu: Whenever using Ge Fen (Clam Shell Powder), select clam shells with purple edges, calcine them over charcoal fire into powder, mash them together with mature Gua Lou (Trichosanthis Fructus) including seeds, form into dough balls, air-dry, and use. This method is most excellent.
[Ri Hua Zi said] Whenever using, select aged materials, calcine them over charcoal fire until red-hot, quench them three times with Mi Cu (Rice Vinegar) to eliminate "fire toxicity," and then grind into powder.
[An unnamed physician said] Whenever entering medicine, it must be calcined before use. [An unnamed physician said] When selecting, do not use shells of flower insects; although they look very similar, they are ineffective. Bei Zi (Concha Arcae) should be soaked relatively in honey and vinegar, steamed, taken out, rinsed with clear wine, and then ground.
[An unnamed physician said] Ke (shell-like medicinal materials) should be harvested in winter, selecting those that are white and greasy in texture, possessing white spiral water-wave patterns. Do not let them see fire, or they will lose efficacy. Whenever using, scrape off the powder with a copper knife, grind finely, sieve, and grind again a thousand times. It is not used in prescriptions for women.
[An unnamed physician said] When preparing, boil raw Mao Xiang (Acori Tatarinowii Rhizoma) and Zao Jiao (Gleditsiae Fructus) together for half a day, then pound and sieve in a stone mortar. [Experience Prescription said] When preparing, use yellow mud... (original text has gaps, Song Chu, San Fu Ying, Xiang, Yan)
[Li Shizhen said] The sides are called Ya (teeth/gums), and the middle is called Chi (teeth). For medicinal use, burn them. The *Qian Shi Xiao Er Fang* states: "Use human teeth calcined to retain their nature. Add She Xiang (Moschus)... whether blue-purple or turned black, use shed human teeth, regardless of quantity. Seal tightly in a clay jar, calcine to remove fire toxicity, grind into powder, and use."
[Meng Shen said] In the twelfth lunar month, cut Dan Zhu (Phyllostachys heterocycla var. pubescens), remove the green skin, insert into manure, soak until permeated, extract the juice. This treats epidemic heat diseases and poisoning, named Fen Qing (Manure Juice). [Tao Hongjing said] Use an empty bottle with its mouth plugged, insert into manure, accumulate for years to obtain juice. It is very dark and bitter, named Huang Long Tang (Yellow Dragon Decoction). It cures patients dying from warm diseases.