\r龙骨\pd386.bmp\r
味甘，平、微寒，无毒。主心腹鬼疰，精物老魅，咳逆，泄痢脓血，女子漏下，症瘕
坚结，小儿热气惊痫，疗心腹烦满，四肢痿枯，汗出，夜卧自惊，恚怒，伏气在心下，不得
喘息，肠痈内疽阴蚀，止汗，缩小便，溺血，养精神，定魂魄，安五脏。
白龙骨 疗梦寐泄精，小便泄精。
臣禹锡等谨按泄精通用药云∶白龙骨，平，微寒。
齿 主小儿、大人惊痫，癫疾狂走，心下结气，不能喘息，诸痉，杀精物，小儿
五惊、十二
痫，身热不可近，大人骨间寒热。又杀蛊毒。得人参、牛黄良，畏石膏。
臣禹锡等谨按惊邪通用药及药对云∶龙齿，平。
角 主惊痫螈（尺曳切） （子用切），身热如火，腹中坚及热泄。久服轻身，通
神明，延年
。生晋地川谷及太山岩水岸土穴中死龙处。采无时。畏干漆、蜀椒、理石。
陶隐居云∶今多出梁、益间，巴中亦有。骨欲得脊脑，作白地锦文，舐之着舌者良。齿
小强
，犹有齿形。角强而实。又有龙脑，肥软，亦断痢。云皆是龙蜕，非实死也。比来巴中，数
得龙胞，吾自亲见，形体具存，云疗产后余疾，正当末服之。唐本注云∶龙骨，今并出晋地
，生硬者不好，五色具者良。其青、黄、赤、白、黑，亦应随色与腑脏相会，如五芝、五石
英、五石脂等辈。而《本经》不论，莫知所以。臣禹锡等谨按药对云∶龙角，平。吴氏云
∶龙骨，色青白者善。又云齿，神农、季氏∶大寒。药性论云∶龙骨，君，忌鱼，有小毒。
逐
邪气，安心神，止冷痢及下脓血，女子崩中，带下，止梦泄精，夜梦鬼交，治尿血，虚而多
梦纷纭，加而用之。又云龙齿，君。镇心，安魂魄。齿、角俱主小儿大热。日华子云∶龙骨
，健脾，涩肠胃，止泻痢，渴疾，怀孕漏胎，肠风下血，崩中带下，鼻洪，吐血，止汗。又
云龙齿，涩，凉。治烦闷，癫痫，热狂，辟鬼魅。
图经曰∶龙骨并齿、角，出晋地川谷及泰山岩水岸土穴中死龙处，今河东州郡多有之。
或云是龙蜕，实非死骨，得
脊脑，作白地锦文，舐之着舌者良。齿小强，犹有齿形。角强而实。采无时。李肇《国史补》
云∶春水时至，鱼登龙门，
蜕其骨甚多，人采以为药，而有五色者。《本经》云∶出晋地。龙门又是晋地，岂今所谓龙
骨者，乃此鱼之骨乎？或云骨
有雄、雌，细纹而广者是雌，粗纹而狭者是雄。凡入药，五色具者尤佳，黄白色者次，黑色
者下。皆不得经落不净处，
则不堪用。骨、齿医家常用，角亦稀使。唯深师五邪丸用龙角。又云∶无角用齿。《千金方》
治心，有兼用龙齿、龙角者。
韦丹疗心热风痫，取烂龙角浓研取汁，食上服二大合，日再。然则龙角有烂者，此物大抵世
所稀有。孙光宪《北梦琐言》
云∶石晋时镇州接邢台界，尝斗杀一龙，乡豪有曹宽者见之，取其双角，角前有一物如蓝色，
纹如乱锦，人莫之识。曹
宽未经年为寇所杀，镇师俄亦被诛。又云∶海上人言龙每生二卵，一为吉吊。吉吊多与鹿游，
或于水边遗沥，值流槎则
粘着木枝，如蒲槌状，其色微青黄，复似灰色，号紫梢花，坐汤多用之。《延龄至宝方》治
聋，无问年月者，取吉吊脂，
每日点半杏仁许入耳中，便瘥。云此物福、建州甚不为难得，其脂须琉璃瓶子盛，更以樟木
合重贮之，不尔则透气，失
之矣。又《箧中方》女经积年不通，必治之，用龙胎、瓦松、景天三物各少许，都
以水两盏，煎取一盏，去滓。分温二服，少顷腹中转动，便下。龙胎，古今方∶不见用者，
人亦鲜识。本方注云∶此
物出蜀中山涧大水中，大类干鱼鳞，投药煎时甚腥臊。方∶家稀所闻见，虽并非要药，然昔
人曾用，世当有识者，因附
于此，以示广记耳。
雷公云∶剡州生者、仓州、太原者上。其骨细纹广者是雌，骨粗纹狭者是雄。骨五色者
上，
白
煎
汤浴过两度，捣研如粉，用绢袋子盛粉末了。以燕子一只，擘破腹去肠，安骨末袋于燕腹内
，悬于井面上一宿，至明去燕子并袋子，取骨粉重研万下，其效神妙。但是丈夫服空心，益
肾药中安置，图龙骨气入肾脏中也。圣惠方∶治小儿脐疮久不瘥。用龙骨烧灰细研，敷之。
外台秘要疗伤寒已八、九日至十余日，大烦渴，热盛而三焦有疮 者，多下，或张口吐舌呵
吁
，目烂，口鼻生疮，吟语，不识人，除热毒止痢。龙骨半斤，碎，以水一斗，煮取四升，沉
之井底。令冷，服五合，渐渐进之。恣意饮，尤宜老少。千金方∶妇人无故尿血。龙骨一两
，以酒调方寸匕，空心，日三。又方∶治好忘，久服聪明益智。龙骨、虎骨、远志等分，右
三味为末。食后酒服方寸匕，日三服。肘后方∶治热病不解而下痢欲死。龙骨半斤，捣研，
水
一斗，煮取五升，候极冷，稍稍饮，得汗即愈。又方∶治老疟。末龙骨方寸匕，先发一时，
酒
一升半，煮取三沸，及热尽服，温复取汗，即效。又方∶若久下痢，经时不止者，此成休息。
龙
骨四两，如小豆大，碎，以水五升，煮取二升半，令冷，分为五服。又以米饮和为丸，服十
丸
。经验方∶暖精气，益元阳。白龙骨、远志等分为末，炼蜜为丸，如梧桐子大。空心、卧时
冷水下三十丸。梅师方∶治失精，暂睡即泄。白龙骨四分，韭子五合，右件为散子。空心酒
调
方寸匕服。又方∶治热病后下痢，脓血不止，不能食。白龙骨末，米饮调方寸匕服。又方∶
治鼻衄
咯吐血
不止。五色龙骨作末，吹一江豆许于鼻中，立止。又方∶治心热风痫。烂龙角浓研汁，食上
服
二合，日再服。姚氏方∶治小便出血。末龙骨二方寸匕，水调温服之，日二服，瘥。姚和众
治小儿因痢脱肛。白龙骨粉，扑之。杨文公谈苑泽州山中多龙骨。盖龙蜕于土中，崖崩多得
之，
体骨、头角皆全。
衍义曰∶龙骨，诸家之说，纷然不一，既不能指定，终是臆度。西京颖阳县民家，忽崖
坏，
得龙骨一副，肢体头角悉具，不知其蜕也？其毙也？若谓蜕毙，则是有形之物，而又生不可
得见
，死方∶可见；谓其化也，则其形独不能化。然《西域记》中所说甚详，但未敢据凭。万物
所禀各异，造化不可尽知，莫可得而详矣。孔子曰∶君子有所不知，盖阙如也。妄乱穿凿，
恐误后学。治精滑及大肠滑，不可阙也。
龙骨
味甘，性平、微寒，无毒。主治心腹部的鬼疰（一种由邪气引起的积聚病），精怪老魅，咳嗽气逆，泄痢脓血，女子漏下（非经期阴道出血），症瘕（腹内结块）坚结，小儿热气惊痫，治疗心腹烦闷胀满，四肢痿弱枯瘦，出汗，夜间睡眠时自惊，愤怒，伏气在心下，不能喘息，肠痈（肠道化脓性炎症）内疽阴蚀（外阴部溃烂），止汗，缩小便，溺血（尿血），养精神，定魂魄，安五脏。
白龙骨：治疗梦寐中泄精，小便泄精。
臣禹锡等人谨按泄精通用药记载说：白龙骨，性平，微寒。
龙齿：主治小儿、大人惊痫，癫疾狂走，心下部结气，不能喘息，各种痉病，杀灭精怪，小儿五惊、十二痫，身体发热不可靠近，大人骨间寒热。又能杀灭蛊毒。与人参、牛黄同用效果好，畏石膏。
臣禹锡等人谨按惊邪通用药及药对记载说：龙齿，性平。
龙角：主治惊痫抽搐（尺曳切）、（子用切），身体发热如火，腹中坚硬及热泄。长期服用可轻身，通神明，延年益寿。产于晋地川谷及泰山岩石水岸土穴中死龙处。采集没有固定时间。畏干漆、蜀椒、理石。
陶隐居说：现在多出产于梁州、益州之间，巴中也有。骨骼要选脊脑部分，呈白色底锦纹，舔之粘舌的为良。牙齿小而坚硬，仍有齿形。角强硬而坚实。又有龙脑，肥软，也能断痢。说是都是龙蜕皮，并非真的死亡。近来在巴中，多次得到龙胞，我自己亲眼看见，形体具存，说是治疗产后余疾，应当研末服用。唐本注说：龙骨，现在都出产于晋地，生硬者不好，五色俱全者良。其青、黄、赤、白、黑，也应随颜色与脏腑相会，如五芝、五石英、五石脂等类。但《本经》未论及，不知所以然。臣禹锡等人谨按药对记载说：龙角，性平。吴氏说：龙骨，色青白的为好。又说龙齿，神农、季氏认为：大寒。《药性论》说：龙骨，为君药，忌鱼，有小毒。逐邪气，安心神，止冷痢及下脓血，女子崩中，带下，止梦泄精，夜梦鬼交，治尿血，虚而多梦纷纭，加而用之。又说龙齿，为君药。镇心，安魂魄。齿、角都主治小儿大热。日华子说：龙骨，健脾，涩肠胃，止泻痢，渴疾，怀孕漏胎，肠风下血，崩中带下，鼻洪，吐血，止汗。又说龙齿，涩，凉。治烦闷，癫痫，热狂，辟鬼魅。
《图经》说：龙骨并齿、角，出晋地川谷及泰山岩水岸土穴中死龙处，现在河东州郡多有之。有人说这是龙蜕，其实不是死骨，得脊脑，作白地锦文，舔之着舌者为良。齿小强，犹有齿形。角强而实。采集无固定时间。李肇《国史补》说：春水时至，鱼登龙门，蜕其骨甚多，人采以为药，而有五色者。《本经》说：出晋地。龙门又是晋地，难道今所谓龙骨者，乃是此鱼之骨乎？有人说骨有雄、雌，细纹而广者是雌，粗纹而狭者是雄。凡入药，五色俱全者尤佳，黄白色者次之，黑色者下。皆不得经落不净处，则不堪用。骨、齿医家常用，角亦稀使。唯深师五邪丸用龙角。又说：无角用齿。《千金方》治心，有兼用龙齿、龙角者。
韦丹治疗心热风痫，取烂龙角浓研取汁，食上服二大合，日再服。然而龙角有烂者，此物大抵世所稀有。孙光宪《北梦琐言》说：石晋时镇州接邢台界，曾斗杀一龙，乡豪有曹宽者见之，取其双角，角前有一物如蓝色，纹如乱锦，人莫之识。曹宽未经年为寇所杀，镇师俄亦被诛。又说：海上人言龙每生二卵，一为吉吊。吉吊多与鹿游，或于水边遗沥，值流槎则粘着木枝，如蒲槌状，其色微青黄，复似灰色，号紫梢花，坐汤多用之。《延龄至宝方》治聋，无论年月者，取吉吊脂，每日点半杏仁许入耳中，便瘥。说此物福、建州甚不为难得，其脂须琉璃瓶子盛，更以樟木盒重贮之，不然则透气，失之矣。又《箧中方》女经积年不通，必治之，用龙胎、瓦松、景天三物各少许，都以水两盏，煎取一盏，去滓。分温二服，少顷腹中转动，便下。龙胎，古今方：不见用者，人亦鲜识。本方注说：此物出蜀中山涧大水中，大类干鱼鳞，投药煎时甚腥臊。方家稀所闻见，虽并非要药，然昔人曾用，世当有识者，因附于此，以示广记耳。
雷公说：剡州生者、仓州、太原者上。其骨细纹广者是雌，骨粗纹狭者是雄。骨五色者上，白煎汤浴过两度，捣研如粉，用绢袋子盛粉末了。以燕子一只，擘破腹去肠，安骨末袋于燕腹内，悬于井面上一宿，至明去燕子并袋子，取骨粉重研万下，其效神妙。但是丈夫服空心，益肾药中安置，图龙骨气入肾脏中也。《圣惠方》：治小儿脐疮久不瘥。用龙骨烧灰细研，敷之。《外台秘要》疗伤寒已八、九日至十余日，大烦渴，热盛而三焦有疮者，多下，或张口吐舌呵吁，目烂，口鼻生疮，吟语，不识人，除热毒止痢。龙骨半斤，碎，以水一斗，煮取四升，沉之井底。令冷，服五合，渐渐进之。恣意饮，尤宜老少。《千金方》：妇人无故尿血。龙骨一两，以酒调方寸匕，空心，日三。又方：治好忘，久服聪明益智。龙骨、虎骨、远志等分，右三味为末。食后酒服方寸匕，日三服。《肘后方》：治热病不解而下痢欲死。龙骨半斤，捣研，水一斗，煮取五升，候极冷，稍稍饮，得汗即愈。又方：治老疟。末龙骨方寸匕，先发一时，酒一升半，煮取三沸，及热尽服，温复取汗，即效。又方：若久下痢，经时不止者，此成休息。龙骨四两，如小豆大，碎，以水五升，煮取二升半，令冷，分为五服。又以米饮和为丸，服十丸。《经验方》：暖精气，益元阳。白龙骨、远志等分为末，炼蜜为丸，如梧桐子大。空心、卧时冷水下三十丸。《梅师方》：治失精，暂睡即泄。白龙骨四分，韭子五合，右件为散子。空心酒调方寸匕服。又方：治热病后下痢，脓血不止，不能食。白龙骨末，米饮调方寸匕服。又方：治鼻衄咯吐血不止。五色龙骨作末，吹一江豆许于鼻中，立止。又方：治心热风痫。烂龙角浓研汁，食上服二合，日再服。姚氏方：治小便出血。末龙骨二方寸匕，水调温服之，日二服，瘥。姚和众治小儿因痢脱肛。白龙骨粉，扑之。杨文公谈苑泽州山中多龙骨。盖龙蜕于土中，崖崩多得之，体骨、头角皆全。
《衍义》说：龙骨，诸家之说，纷然不一，既不能指定，终是臆度。西京颖阳县民家，忽崖坏，得龙骨一副，肢体头角悉具，不知其蜕也？其毙也？若谓蜕毙，则是有形之物，而又生不可得见，死方可见；谓其化也，则其形独不能化。然《西域记》中所说甚详，但未敢据凭。万物所禀各异，造化不可尽知，莫可得而详矣。孔子曰：君子有所不知，盖阙如也。妄乱穿凿，恐误后学。治精滑及大肠滑，不可阙也。
Longgu (Fossil Bone)
Sweet in flavor, neutral and slightly cold in nature, non-toxic. It primarily treats Gu Zhu (a type of accumulation disease caused by evil qi) in the heart and abdomen, old spirits and demons, cough with reverse flow of Qi, dysentery with pus and blood, leukorrhea (non-menstrual vaginal bleeding) in women, hard and fixed masses (Zheng Jia), pediatric heat-induced convulsions and epilepsy, treats irritability and fullness in the heart and abdomen, flaccidity and atrophy of the four limbs, sweating, spontaneous fright during sleep at night, anger, latent Qi lodged under the heart, inability to breathe, intestinal abscesses, internal carbuncles, and genital ulcers. It stops sweating, reduces urination, treats hematuria, nourishes the spirit, stabilizes the soul, and calms the five Zang organs.
Bai Longgu (White Fossil Bone): Treats seminal emission during dreams and urination.
Minister Yu Xi et al. respectfully note regarding general medicines for seminal emission: Bai Longgu is neutral and slightly cold.
Longchi (Dragon Teeth): Primarily treats pediatric and adult convulsions and epilepsy, manic disorder with wild running, Qi knotting below the heart, inability to breathe, various spasm disorders, kills spirits and demons, pediatric "Five Frights" and "Twelve Epilepsies", body heat that cannot be approached, and alternating chills and fever in the bones of adults. It also kills gu poison. It works well when combined with Renshen (Ginseng Root) and Niuhuang (Calculus Bovis), but fears Shigao (Gypsum Fibrosum).
Minister Yu Xi et al. respectfully note regarding general medicines for frightening pathogens and drug pairs: Longchi is neutral.
Longjiao (Dragon Horns): Primarily treats convulsions and spasms, high body heat like fire, hardness in the abdomen, and hot diarrhea. Long-term use lightens the body, enhances spiritual clarity, and prolongs life. It grows in the rivers and valleys of Jin region and in soil caves on the rocky banks of Mount Tai where dead dragons were found. It can be harvested at any time. It fears Ganqi (Dried Lacquer) and Shujiao (Sichuan Pepper).
Tao Hongjing says: Currently, it is mostly produced between Liangzhou and Yizhou, and also in Bazhong. The bone should be selected from the spinal marrow area, displaying a white background with brocade-like patterns; those that stick to the tongue when licked are of good quality. The teeth are small and strong, retaining their tooth shape. The horns are hard and solid. There is also "Long Nao" (Dragon Brain), which is fat and soft, and can also stop dysentery. It is said to be shed skin of dragons, not actual dead bones. Recently in Bazhong, dragon bladders have been obtained several times, which I have seen personally with my own eyes; they retain their complete form and are said to treat residual diseases after childbirth, and should be taken as powder. Tang Ben Zhu notes: Longgu is currently produced in Jin region; those that are hard and raw are not good, while those possessing all five colors are excellent. Its green, yellow, red, white, and black colors should correspond to the Zang organs, similar to Wuzhi (Five Mushrooms), Wu Shiying (Five Quartzs), and Wushizhi (Five Clay Minerals). However, the *Ben Jing* does not discuss this, and the reason is unknown. Minister Yu Xi et al. respectfully note regarding drug pairs: Longjiao is neutral. Wu Shi says: Longgu with blue-white color is superior. He also states regarding Longchi: Shen Nong and Ji Shi consider it very cold. *Yao Xing Lun* says: Longgu is a sovereign herb, incompatible with fish, and has slight toxicity. It expels evil Qi, calms the mind, stops cold dysentery and passage of pus and blood, treats metrorrhagia and leukorrhea in women, stops seminal emission in dreams, nocturnal emissions involving ghosts, treats hematuria, and is added for deficiency with frequent chaotic dreams. He also states regarding Longchi: It is a sovereign herb. It anchors the heart and stabilizes the soul. Both teeth and horns primarily treat severe heat in children. Ri Huazi says: Longgu strengthens the spleen, astringes the intestines and stomach, stops diarrhea and dysentery, treats thirst and diseases, prevents fetal leakage during pregnancy, treats intestinal wind with lower bleeding, metrorrhagia and leukorrhea, epistaxis, hematemesis, and stops sweating. He also states regarding Longchi: It is astringent and cool. It treats irritability, epilepsy, manic heat, and repels spirits and demons.
*Tu Jing* says: Longgu, along with its teeth and horns, comes from the rivers and valleys of Jin region and soil caves on the rocky banks of Mount Tai where dead dragons were found; it is now abundant in Hedong prefectures and commanderies. Some say it is shed dragon skin, actually not dead bone; selecting the spinal marrow with white brocade patterns that stick to the tongue indicates good quality. The teeth are small and strong, retaining tooth shape. The horns are hard and solid. Harvesting has no fixed time. Li Zhao's *Guo Shi Bu* says: When spring waters rise, fish climb the Dragon Gate, shedding many bones, which people collect as medicine, some having five colors. The *Ben Jing* says it comes from Jin region. Since Longmen is also in Jin region, could the so-called Longgu today be the bones of these fish? Some say the bones have male and female types; fine-grained and broad ones are female, coarse-grained and narrow ones are male. For medicinal use, those with all five colors are best, followed by yellow-white, and black is inferior. They must not come from places contaminated with impurities, otherwise they are unusable. Bones and teeth are commonly used by physicians, while horns are rarely used. Only in Shen Shi's *Wuxie Wan* are dragon horns used. It is also stated: if horns are unavailable, use teeth. In *Qianjin Fang*, treatments for heart conditions sometimes combine Longchi and Longjiao.
Wei Dan treated wind-heat manic epilepsy by taking rotten dragon horns, grinding them thickly to extract juice, taking two large he (unit of volume) after meals, twice a day. However, rotten dragon horns are generally rare in the world. Sun Guangxian's *Bei Meng Suo Yan* says: During the Later Shijin period, at the border of Zhenzhou and Xingtai, a dragon was fought to death. A local magnate named Cao Kuan saw it, took its pair of horns. In front of the horns was an object like blue color, with patterns like messy brocade, which no one recognized. Cao Kuan was killed by bandits within a year, and the garrison soldiers were also executed shortly after. It is also said: People on the sea coast say dragons lay two eggs each time, one becomes "Jidiao". Jidiao often associates with deer, or leaves secretions by the water; when encountering floating debris, it sticks to tree branches, resembling a cattail club, with a slightly greenish-yellow color, resembling gray, called Zixiaohua (Purple Tip Flower), often used in decoctions. *Yanling Zhibao Fang* treats deafness regardless of duration by taking Jidiao grease, inserting half an almond-sized amount into the ear daily, resulting in cure. It is said this item is not rare in Fujian and Jianzhou; its grease must be stored in glass bottles, further sealed in camphor wood boxes, otherwise it will lose potency due to air permeability. Also, *Qiezhong Fang* for amenorrhea lasting years, which must be treated, uses small amounts of Longtai (Dragon Fetus), Wasong (Tile Moss), and Jingtian (Crassula) three items, boiled in two cups of water to obtain one cup, strained. Divided into two warm doses; after a short while, abdominal movement occurs, and menstruation flows. Longtai: Not seen used in ancient and modern formulas, and few people recognize it. The original formula note says: This item comes from large streams in mountain ravines in Shu, resembling dried fish scales, very fishy and smelly when decocted with medicine. Formula experts rarely hear of or see it; although not a crucial herb, since ancients used it, there should be those who know it in the world, so it is attached here to show extensive recording.
Lei Gong says: Those from Yanzhou, Cangzhou, and Taiyuan are superior. Bones with fine grains and broad texture are female, bones with coarse grains and narrow texture are male. Bones with five colors are superior. Boil in water, bathe twice, grind into powder, store in silk bags. Take one swallow, break open its belly, remove intestines, place the bag of bone powder inside the swallow's belly, hang it over a well overnight. At dawn, remove the swallow and bag, take the bone powder and grind it ten thousand times; the effect is miraculous. Men should take it on an empty stomach, placed within kidney-tonifying formulas, aiming for the Qi of Longgu to enter the Kidney organ. *Shenghui Fang*: Treats infantile umbilical ulcers that do not heal for a long time. Use Longgu burnt to ash, finely ground, and applied externally. *Waitai Miyao* treats Cold Damage that has lasted eight or nine days to more than ten days, with great irritability and thirst, intense heat, and sores in the Sanjiao, frequent loose stools, or opening mouth and sticking out tongue with sighing, rotting eyes, sores in mouth and nose, muttering, and inability to recognize people. It removes heat toxins and stops dysentery. Half jin of Longgu, crushed, boiled in one dou of water to obtain four sheng, submerged in the bottom of a well until cold. Take five he gradually. Drink freely, especially suitable for young and old. *Qianjin Fang*: Women with spontaneous hematuria. One liang of Longgu, mixed with wine using a square-inch scoop, taken on an empty stomach, three times a day. Another formula: Treats forgetfulness; long-term use improves intelligence and memory. Equal parts Longgu, Hugu (Tiger Bone), and Yuanzhi (Polygalae Radix), ground into powder. Take one square-inch scoop with wine after meals, three times a day. *Zhouhou Fang*: Treats unresolved febrile disease with fatal diarrhea. Half jin of Longgu, crushed and ground, boiled in one dou of water to obtain five sheng, wait until extremely cold, drink slowly; sweating indicates cure. Another formula: Treats chronic malaria. One square-inch scoop of powdered Longgu, before onset of fever, boiled in one and a half sheng of wine for three boils, drink completely while hot, cover to induce sweat, effective. Another formula: If chronic diarrhea persists for a long time, becoming rest dysentery. Four liang of Longgu, crushed to size of small beans, boiled in five sheng of water to obtain two and a half sheng, let cool, divide into five doses. Also mix with rice water to make pills, take ten pills. *Jingyan Fang*: Warms essence and Qi, benefits primal Yang. Equal parts Bai Longgu and Yuanzhi, ground into powder, refined honey made into pills the size of paulownia seeds. Take thirty pills with cold water on an empty stomach and before bed. *Meishi Fang*: Treats loss of essence, leaking upon brief sleep. Four fen of Bai Longgu, five he of Jiu Zi (Leek Seed), ground together into powder. Take one square-inch scoop mixed with wine on an empty stomach. Another formula: Treats post-febrile dysentery with continuous pus and blood, inability to eat. Take Bai Longgu powder mixed with rice water, one square-inch scoop. Another formula: Treats persistent epistaxis and hemoptysis. Make five-colored Longgu into powder, blow a quantity of a river bean into the nose, stops immediately. Another formula: Treats wind-heat manic epilepsy. Grind rotten dragon horns thickly to extract juice, take two he after meals, twice a day. Yao Shi Fang: Treats hematuria. Two square-inch scoops of powdered Longgu, mixed with warm water, taken twice a day, cured. Yao Hezhong treats infantile rectal prolapse due to dysentery. Dust with Bai Longgu powder. Yang Wengong's *Tan Yuan* says: There is much Longgu in the mountains of Zezhou. It is because dragons shed in the earth, and cliff collapses yield much of it, with body bones, head, and horns all intact.
*Yanyi* says: Regarding Longgu, theories from various schools are inconsistent and cannot be specified, ultimately being speculation. In a commoner's house in Yingyang County, West Capital, a cliff suddenly collapsed, yielding a set of Longgu with complete limbs, head, and horns. It is unknown whether it was shed or died. If considered shed or dead, it is a tangible object, yet living ones cannot be seen, only dead ones visible; if considered transformed, why does its form alone not transform? However, what is described in *Xiyu Ji* is very detailed, but I dare not rely on it. All things receive different endowments, creation cannot be fully known, and details cannot be ascertained. Confucius said: "The gentleman knows what he does not know," leaving gaps as appropriate. Wild and forced interpretations may mislead future learners. It cannot be omitted in treating seminal slipperiness and large intestine slipperiness.