味甘，温，无毒。主痼冷，积聚，轻身延年，多食令人热。唐本注云∶出徐州西
宋里山。入土丈余于烂土石间，黄白色，细软如面。一名化公石，一名石脑。炼服别有法。
（唐本先附）
臣禹锡等谨按蜀本注云∶今据中品自有石脑一条，主治与此甚别，应似徐长卿一名鬼督
邮
之类也。
图经文具 石条下。
丹房镜源∶握雪 石，干汞，制汞并丹砂。
主腹痛噎，中恶，鼻衄，小儿软疮。（唐本先附）
臣禹锡等谨按药对云∶梁上尘，微寒。日华子云∶平，无毒。
雷公云∶凡使，须去烟火远，高堂殿上者，拂下，筛用之。外台秘要∶治小便不通及胞
转。取梁上尘三指撮，以水
服之。又方∶治自缢死。用梁上尘如大豆，各纳一个耳、鼻中，四处各一粒，极力齐吹之，
即活。千金方∶妒乳，梁上
尘醋和涂之，亦治阴肿。又方∶治妇人日月未足而欲产。取梁上尘、灶突煤二味，合方寸匕，
酒服。千金翼∶凡痈，以
梁上尘、灰葵茎等分，用醋和敷之。子母秘录∶治横生不可出。梁上尘，酒服方寸匕，亦治
倒生。又方∶治小儿头疮。
梁上尘和油，取瓶下滓，以皂荚汤洗后涂上。
味咸，无毒。主妇人阴蚀，大热，干痂。生高山崖上之阴，色白如脂。采无时。
陶隐居云∶此犹似钟乳、孔公孽之类，故亦有孽名，但在崖上尔，今时有之，但不复采
用。唐本注云∶此即土乳是也，出渭州鄣县三交驿西北坡平地土窟中，见有六十余坎昔人采
处。
用。今
按∶别本注云∶此则土脂液也，生于土穴，状如殷孽，故名土阴孽。臣禹锡等谨按蜀本注
云∶今据《本经》所载，既与陶注同，而苏说独异，恐苏亦未是。
Taste: Sweet. Nature: Warm. Toxicity: Non-toxic. Indications: Mainly treats chronic cold conditions, accumulations and masses; promotes lightness of the body and longevity. However, excessive consumption causes heat in the body. Note from *Tang Bencao* (Tang Dynasty Materia Medica): Grows in Xisongli Mountain, Xuzhou. It is found more than one zhang (approx. 3.3 meters) underground among rotting earth and stones, yellowish-white in color, fine and soft like flour. Also known as Huagong Shi (Duke's Stone), also known as Shi Nao (Stone Brain). There is a specific method for refining and taking it. (Pre-attached note from *Tang Bencao*)
Minister Yuxi et al. respectfully note according to *Shu Bencao* (Shu Province Materia Medica): Currently, there is already an entry for "Shi Nao" in the Middle Category with very different indications; it should be similar to herbs such as Xuchangqing (Caulis Clematidis Armandii, alias Guidu You). Detailed illustrations are recorded under the entry for "Stone" in *Tujing Bencao* (Illustrated Classic of Materia Medica).
*Dangan Jingyuan* (Mirror Source of Alchemy): Woxue Shi (Snow-Holding Stone) is used for drying mercury, processing mercury, and cinnabar.
Indications: Abdominal pain with dysphagia, sudden evil qi attack, epistaxis, and soft sores in infants. (Pre-attached note from *Tang Bencao*)
Minister Yuxi et al. respectfully note according to *Yaodui* (Pairs of Medicinals): Liangshang Chen (Dust from Beams), nature slightly cold. Rihuazi says: Nature neutral, non-toxic.
Leigong says: When using this herb, one must stay far from smoke and fire, take dust brushed down from high halls and temples, and sieve it for use. *Waitai Miyao* (Secret Essentials of the Outer Cabinet): Treats urinary retention and bladder torsion. Take three fingerfuls of Liangshang Chen, administer with water. Another prescription: Treats death by hanging. Use Liangshang Chen the size of soybeans, insert one into each ear and nose (four openings total), and blow forcefully into all four simultaneously; life will return. *Qianjin Fang* (Essential Prescriptions Worth a Thousand Gold): Treats Du Ru (breast engorgement/mastitis during lactation); mix Liangshang Chen with vinegar and apply topically; also treats genital swelling. Another prescription: Treats premature labor or difficult delivery before term. Take Liangshang Chen and Zhaotu Mei (soot from the kitchen chimney), combine to form a measure of one fangcun bi (square-inch scoop), administer with wine. *Qianjin Yifang* (Supplement to Essential Prescriptions Worth a Thousand Gold): For any carbuncle, mix equal parts of Liangshang Chen and Hui Kuijing (ash of sunflower stem), blend with vinegar and apply as a poultice. *Zimu Milu* (Secret Record of Mother and Child): Treats transverse presentation (malposition causing dystocia). Administer Liangshang Chen with wine, one fangcun bi; also treats breech presentation. Another prescription: Treats infant head sores. Mix Liangshang Chen with oil, take the sediment from the bottom of the bottle, wash the affected area with soap pod decoction, and then apply.
Taste: Salty. Toxicity: Non-toxic. Indications: Mainly treats female genital erosion, intense heat, and dry scabs. Grows on the shady slopes of high mountain cliffs, white in color like fat. Harvest at any time.
Tao Hongjing says: This resembles Zhuru (Stalactite) and Konggong Nie (Konggong Residue) in nature, hence the name "Nie," but it grows on cliff faces. Although present today, it is no longer collected for use. Note from *Tang Bencao*: This is Tu Ru (Earth Milk), produced in the flat earth caves on the northwest slope of Sanjiao Post Station, Zhang County, Weizhou. Over sixty pits can be seen where ancestors mined it. Current analysis: Another edition's note states: This is Tuzhiye (Earth Fat Liquid), growing in earth holes, resembling Yin Nie (Yin Residue) in shape, thus named Tuyin Nie. Minister Yuxi et al. respectfully note according to *Shu Bencao*: According to the record in *Shennong Benjing* (Divine Farmer's Materia Medica), it aligns with Tao Hongjing's annotation, whereas Su Gong's explanation differs uniquely. It is suspected that Su Gong's view may not be correct.