（《本经》中品）
【释名】孔公石（《纲目》）、通石。
时珍曰∶孔窍空通，附垂于石，如木之芽 ，故曰孔空 ，而俗讹为孔公尔。
恭曰∶此 次于钟乳，状如牛羊角，中有孔通，故名通石。《别录》误以此为殷 之根
，而俗犹呼为孔公 是也。
【集解】《别录》曰∶孔公 ，殷 根也。青黄色，生梁山山谷。
弘景曰∶梁山属冯翊郡，此即今钟乳床也，亦出始兴，皆大块，打破之。凡钟乳之类有
三种，同一体。从石室上汁溜积久盘结者，为钟乳床，即孔公 也。
其以次小 者，为殷 ，大如牛羊角，长一、二尺，今人呼此为孔公 也。殷 复溜，
轻好者为钟乳。虽同一类，而疗体各异，贵贱悬殊。三种同根，而所生各处，当是随其土地
为胜尔。
保升曰∶钟乳之类凡五种∶钟乳、殷 、孔公 、石床、石花也。虽同一体，而主疗各
异。
颂曰∶孔公 、殷 既是钟乳同生，则有 处皆当有乳，今不闻有之。岂用之既寡，则
采者亦稀乎？抑时人不知 中有乳，不尽采乎？不能尽究也。
恭曰∶孔公 次于钟乳，《别录》误以为殷 之根。殷 即孔公 之根，俗人乃以孔公
为殷 ，陶氏依之，以孔公 为钟乳床，非矣。
时珍曰∶以姜石、通石二石推之，则似附石生而粗者，为殷 ；接殷 而生，以渐空通
者，为孔公 ；接孔公 而生者，为钟乳。当从苏恭之说为优。盖殷 如人之乳根，孔公
如乳房，钟乳如乳头也。
【气味】辛，温，无毒。普曰∶神农∶辛；岐伯∶咸；扁鹊∶酸，无毒。
大明曰∶甘，暖。
权曰∶甘，有小毒。
之才曰∶木兰为之使，恶细辛、术，忌羊血。
【主治】伤食不化，邪结气恶，疮疽 痔，利九窍，下乳汁（《本经》）。
男子阴疮，女子阴蚀，及伤食病，常欲眠睡（《别录》）。
主腰冷膝痹毒瓦斯，能使喉声圆亮（甄权）。轻身充肌（青霞子）。
【发明】弘景曰∶二 不堪丸散，只可水煮汤，并酒浸饮之，甚疗脚弱香港脚。
【附方】新一。
风气脚弱∶孔公 二斤，石斛五两，酒二斗，浸服。（《肘后方》）
(Recorded in the Middle Category of *Shennong Bencao Jing*)
[Names] Konggongshi (from *Bencao Gangmu*), Tongshi.
Li Shizhen stated: Because it has hollow pores and hangs attached to the rock like a tree bud, it is called "Kongkong" (Hollow), which was later colloquially mispronounced as "Konggong".
Su Gong stated: This stone ranks below Zhongru (Stalactite). Its shape resembles the horns of cattle or sheep, with a hole passing through the center, hence named Tongshi (Passing Stone). *Bielu* mistakenly identified it as the root of Yenie, but the common people still call it Konggongshi, which is correct.
[Collection and Explanation] *Bielu* states: Konggongshi is the root of Yenie. It is greenish-yellow in color and grows in the valleys of Liangshan.
Tao Hongjing stated: Liangshan belongs to Fengyi Commandery. This is what is now known as Zhongchuang (Stalactite Bed). It is also produced in Shixing. These are large chunks that must be broken open. There are three types of minerals in the Zhongru category that share the same substance. The fluid dripping from the top of stone chambers accumulates over time to form knots; this is called Zhongchuang, which is Konggongshi. The smaller ones of the next grade are called Yenie, resembling cattle or sheep horns in size, one to two chi long. People currently refer to this as Konggongshi. The fluid dripping from Yenie, if light and fine, is called Zhongru (Stalactite). Although they belong to the same category, their therapeutic properties differ significantly, as do their prices. These three share the same root but grow in different places; their quality depends on the local terrain.
Zheng Baosheng stated: There are five types of minerals in the Zhongru category: Zhongru, Yenie, Konggongshi, Shichuang (Stone Bed), and Shihua (Stone Flower). Although they share the same substance, their primary treatments vary.
Su Song stated: Since Konggongshi and Yenie grow together with Zhongru, wherever there are rocks, there should be Zhongru. Yet, we do not hear of such occurrences today. Is it because usage is scarce, leading to fewer collectors? Or do contemporary people not know that Zhongru exists within the stones and fail to collect them all? It is impossible to investigate thoroughly.
Su Gong stated: Konggongshi ranks below Zhongru. *Bielu* mistakenly regarded it as the root of Yenie. In fact, Yenie is the root of Konggongshi. Laypeople mistake Konggongshi for Yenie. Tao Hongjing followed this error, identifying Konggongshi as Zhongchuang, which is incorrect.
Li Shizhen stated: Inferring from Jiangshi and Tongshi, it appears that the coarse forms growing attached to the rock are Yenie; those growing from Yenie and gradually becoming hollow are Konggongshi; and those growing from Konggongshi are Zhongru. Su Gong's explanation is superior. Essentially, Yenie is like the breast root of a human, Konggongshi is like the breast, and Zhongru is like the nipple.
[Flavor and Properties] Acrid, Warm, Non-toxic. Pu cited Shennong saying it is Acrid; Qibo said it is Salty; Bianque said it is Sour and Non-toxic.
Meng Shen stated: Sweet, Warm-natured.
Li Quan stated: Sweet, Slightly toxic.
Xu Zhicai stated: Magnolia bark (Mulan) serves as its guiding herb. It is incompatible with Xixin (Asarum) and Baizhu (Atractylodes macrocephala). Avoid consuming sheep blood.
[Indications] Indigestion due to food stagnation, evil qi accumulation causing malignant conditions, sores, carbuncles, hemorrhoids. Opens the nine orifices. Promotes lactation (*Shennong Bencao Jing*).
Penile ulcers in men, vaginal erosion in women, and food stagnation disease characterized by excessive drowsiness (*Bielu*).
Treats coldness in the waist and bi-syndrome (painful obstruction) in the knees caused by toxic vapors. Makes the voice clear and resonant (Zhen Quan). Lightens the body and fills out the muscles (Qingxiazi).
[Elucidation] Tao Hongjing stated: These two stones are unsuitable for making pills or powders. They can only be boiled in water to make decoctions or soaked in wine for drinking. They are very effective for treating leg weakness and Hongxiangjiao (Hong Kong foot / Tinea pedis).
[Attached Prescriptions] One new prescription.
Wind-dampness causing leg weakness: Konggongshi 2 jin, Shihu (Dendrobium) 5 liang, Wine 2 dou. Soak and consume (*Zhouhou Beiji Fang*).