（《唐本草》）
【集解】恭曰∶握雪 石出徐州宋里山。入土丈余，于烂土石间得之。细散如面，黄白
色。土人号为握雪 石，一名化公石，一名石脑，云服之长生。
时珍曰∶谨按∶独孤滔《丹房镜源》云∶握雪 石出曲滩泽。盛寒时有髓生于石上，可
采。一分结汞十两。又按∶南宫从《岣嵝神书》云∶石液，即丹矾之脂液也。此石出襄阳曲
滩泽中，或在山，或在水，色白而粗糯。至冬月有脂液出其上，旦则见日而伏。当于日未出
时，以铜刀刮置器内，火 通赤，取出，楮汁为丸，其液沾处便如铁色。以液一铢，制水银
四两，器中火之立干。但此液亦不多有，乃神理所惜，采时须用白鸡、清酒祭之。此石华山、
嵩山皆出，而有脂液者，惟此曲滩。又熊太古《冀越集》亦言∶丹山矾十两，可干汞十两。
此乃人格物之精，发天地之秘也。据三书所引，则握雪 石乃石之液，非土中石脑也。苏恭
所说，自是石脑。其说与《别录》及陶弘景所注石脑相合，不当复注于此。又按∶诸书或作
石，或作矾石，未知孰是？古书二字每每讹混。以理推之，似是矾石。
石有毒，矾石无毒故也。
【气味】甘，温，无毒。
【主治】痼冷积聚，轻身延年。多食令人热（《唐本》）。治大风疮（时珍）。
（出自《唐本草》）
【集解】苏恭说：握雪石产于徐州宋里山。深入地下丈余，在腐烂的土石之间可以找到。它质地细碎如面粉，呈黄白色。当地人称之为握雪石，又名化公石，又名石脑，传说服用它可以长生不老。
李时珍说：仔细考证独孤滔的《丹房镜源》记载：握雪石产于曲滩泽。在极寒冷的时候，石头上会生长出髓状物，可以采集。一分握雪石可以凝结十两汞。又考证南宫从的《岣嵝神书》记载：石液，就是丹矾的脂液。这种石头产于襄阳曲滩泽中，有的在山里，有的在水里，颜色白且质地粗糯。到了冬天，有脂液从上面渗出，早晨见到太阳就隐伏消失。应当在日出之前，用铜刀刮取放入器皿中，用火烧至通红，取出后用楮树汁制成丸药，其液体沾染的地方就会变成铁色。用一铢的石液，可以制约四两水银，在器皿中加热便会立刻变干。但是这种石液也不多见，乃是神灵所爱惜之物，采集时必须用白鸡和清酒祭祀。华山、嵩山都出产这种石头，但有脂液的，只有曲滩这一处。另外熊太古的《冀越集》也记载：十两丹山矾，可以使十两汞变干。这是人格究事物原理的精微之处，揭示了天地的奥秘。根据这三本书的引用来看，握雪石应该是石的液体，而不是土中的石脑。苏恭所说的，自然是石脑。他的说法与《名医别录》及陶弘景注释的石脑相符合，不应当再注录在这里。又考证：各书中有的写作“石”，有的写作“矾石”，不知道哪个是正确的？古书中这两个字常常混淆。从道理上推断，似乎是矾石。因为石是有毒的，而矾石是无毒的缘故。
【气味】味甘，性温，无毒。
(From *Tang Bencao* [Compendium of Materia Medica of the Tang Dynasty])
[Ji Jie] Su Gong stated: Wo Xue Shi (Snow-Gripping Stone) is produced in Songli Mountain, Xuzhou. It is found more than a zhang underground, amidst rotting earth and stones. It is fine and powdery like flour, with a yellowish-white color. Locals call it Wo Xue Shi, also known as Hua Gong Shi or Shi Nao (Stone Brain), claiming that ingesting it grants longevity.
Li Shizhen stated: Carefully examining Dugu Tao’s *Dan Fang Jing Yuan* [Mirror Source of Alchemical Furnaces], it records: Wo Xue Shi is produced in Qutan Marsh. During extreme cold, marrow-like substances grow on the stones, which can be harvested. One fen of this stone can coalesce ten liang of mercury. Furthermore, consulting Nan Gongcong’s *Gulou Shen Shu* [Divine Book of Mount Gulu], it states: Shi Ye (Stone Liquid) is the fatty liquid of Dan Fan (Alum). This stone is found in Qutan Marsh, Xiangyang; some are in mountains, others in water, appearing white and coarse/sticky. In winter, fatty liquid exudes from its surface, vanishing when exposed to sunlight in the morning. It should be scraped off with a copper knife before sunrise and placed in a vessel, heated until red-hot, then taken out and formed into pills using mulberry juice. Wherever the liquid touches, it turns iron-colored. Using one zhu of this liquid can neutralize four liang of quicksilver; heating it in a vessel causes it to dry instantly. However, this liquid is rare, cherished by divine principles, requiring sacrifice of a white rooster and clear wine during collection. Both Mount Hua and Mount Song produce this stone, but only Qutan yields the fatty liquid. Additionally, Xiong Taigu’s *Ji Yue Ji* mentions: Ten liang of Dan Shan Fan (Alum from Dan Mountain) can dry ten liang of mercury. This represents the essence of human investigation into things, revealing the secrets of heaven and earth. Based on these three texts, Wo Xue Shi refers to the liquid form of stone, not the stone brain within the earth. What Su Gong described is indeed the stone brain. His description aligns with the *Bie Lu* [Separate Record] and Tao Hongjing’s annotations on Shi Nao, and thus should not be re-annotated here. Further examination reveals that various texts use either "Shi" (Stone) or "Fan Shi" (Alum Stone); it is unclear which is correct, as these two characters are often confused in ancient books. Reasoning logically, it seems to be Alum Stone, because Stone is toxic, whereas Alum Stone is non-toxic.
[Qi Wei] Taste: Sweet. Nature: Warm. Toxicity: Non-toxic.
[ Zhu Zhi] Treats chronic cold accumulation syndromes; promotes physical lightness and longevity. Excessive consumption induces heat sensations (*Tang Bencao*). Treats severe wind sores (Li Shizhen).