雷公云∶凡使，勿用色青并底白者。
凡使，先单捣令细，三度筛过了，又入钵中研之，然后将盐汤飞过，浪干。每修事白垩
二两，用白盐一分，投于斗水中，用铜器物内沸十余沸了，然后用此沸了水飞过白垩，免结
涩人肠也。
雷公云∶石髓铅，即自然铜也。凡使，勿用方金牙，其方金牙真似石髓铅，若误饵，吐
煞人。其石髓铅色似干银泥，味微甘。
如采得，先捶碎，同甘草汤煮一伏时，至明漉出，摊令干，入臼中捣了，重筛过，以醋
浸一宿，至明，用六一泥泥瓷合子，约盛得二升已来，于文武火中养三日夜，才干，便用盖
盖
若修事五两，以醋两镒为度。
雷公云∶凡使，先须细认，勿误用。有乌头、乌喙、天雄、侧子、木鳖子。乌头少有茎
苗，长身乌黑，少有旁尖；乌喙皮上苍，有大豆许者孕八、九个周遭，底陷，黑如乌铁；天
雄身全矮，无尖，周匝四面有附孕十一个，皮苍色，即是天雄；并得侧子，只是附子旁，有
小颗附子如枣核者是；木鳖子只是诸喙、附、雄、乌、侧中毗 者，号曰木鳖子，不入药中
用，若服，令人丧目。若附子，底平、有九角、如铁色，一个个重一两，即是气全，堪用。
屋下午地上掘一坑，可深一尺，安于中一宿，至明取出，焙干用。
夫欲炮者，灰火勿用杂木火，只用柳木最妙。
若阴制使，即生去尖皮底，了，薄切，用东流水并黑豆浸五日夜，然后漉出，于日中晒
令干用。
凡使，须阴制，去皮尖了，每十两，用生乌豆五两，东流水六升。
Lei Gong said: When using (Bai E, White Kaolin), do not select those that are greenish in color and white at the base.
When using, first crush it alone until fine, sift it three times, then grind it in a mortar. Subsequently, wash it with salt water solution and dry it. For every two taels of Bai E to be processed, use one fen of white salt, add it to one dou of water, boil it in a copper vessel for more than ten boils, and then use this boiled water to wash the Bai E, thereby preventing it from causing intestinal dryness and constipation.
Lei Gong said: Shi Sui Qian (Stone Marrow Lead) is Zi Ran Tong (Natural Copper). When using, do not select those with square golden teeth; these square golden teeth resemble Shi Sui Qian closely. If mistakenly ingested, they can induce vomiting and death. Shi Sui Qian resembles dried silver mud in color and has a slightly sweet taste.
If collected, first crush it by pounding, then decoct it with Gan Cao Tang (Licorice Decoction) for one fu shi (a four-hour period or approx. two hours depending on context, traditionally 12 double-hours but here likely shorter given "to tomorrow"). Strain it out the next day, spread it to dry, pound it in a mortar, sieve it again, soak it in vinegar overnight. The next day, coat a porcelain jar with Liu Yi Ni (Six-One Mud), fill it with about two sheng of material, and nurture it over gentle and strong fires for three days and nights until completely dry, then cover it.
If processing five taels, use two yi of vinegar as the limit.
Lei Gong said: When using, keep it far from smoke and fire, place it in high halls. Brush off dust, sieve, and use.
Lei Gong said: When using, must carefully identify to avoid misuse. There are Wu Tou (Aconiti Radix), Wu Hui (Aconiti Radix Cum Radicula), Tian Xiong (Aconiti Lateralis Radix Preparata), Ce Zi (Aconiti Lateralis Radix), and Mu Bie Zi (Strychni Semen). Wu Tou has few stem leaves, long body, black, with few lateral points; Wu Hui has a bluish-gray skin, with eight or nine soybean-sized buds surrounding it, depressed bottom, black like iron; Tian Xiong is complete but short, without points, with eleven lateral buds around all sides, bluish-gray skin, this is Tian Xiong; Ce Zi is obtained, which is just small lateral buds like jujube pits attached to the side of Fu Zi (Aconiti Lateralis Radix Preparata); Mu Bie Zi refers to those among the Hui, Fu, Xiong, Wu, Ce that are connected, called Mu Bie Zi, not used in medicine; if taken, it causes blindness. If it is Fu Zi, with a flat bottom, nine angles, iron-colored, each weighing one tael, it is qi-complete and usable. Dig a pit one chi deep in the afternoon on the ground under the house, place it inside for one night, take it out the next morning, bake dry, and use.
For roasting, do not use ash fire mixed with miscellaneous wood fire; only willow wood fire is best.
If using the yin-processing method, use raw material, remove tips and bottoms, slice thinly, soak in Dong Liu Shui (East-flowing Water) and Hei Dou (Black Soybeans) for five days and nights, then strain out, sun-dry, and use.
When using, yin-processing is required. After removing skin and tips, for every ten taels of herb, use five taels of raw Wudou (Black Soybeans) and six sheng of Dong Liu Shui (East-flowing Water).