俞佳士妙应方∶治痞块。八月白露后收糯稻头上露水，晚作二服，饮下立消。
按∶诸草木皆需天露始润，惟稻至酉时，其根上津润之气渐升，入夜乃达叶尖，至晓复
自上
而降于根，故无露之夜，稻叶独润，陈翠虚词，一些珠露，阿谁运上稻花头，是也。
云本山泽之气，蒸而为云，水属也。故入水部。有五色；惟白云可治病，唐守时言∶凡
高山
大川，悉有云气，五岳名山，多出云。山曾取之饷客，其取云法，用金漆盒，盖上凿一孔，
以木塞之。俟天气晴朗，黎明往山岩石畔觅之，见地上有白云如线者，如笋者，茁土而出，
即云苗也。急以盒盖孔对其气，使尽入其中，以木塞口。收必须白云，如雪色，有香气如梅
兰，方合用。其他杂色云，多带草土气，黑云尤腥，多带怪物，不宜盒取。放云之法∶择净
室，须四面有窗者，通上下用纸裱糊，勿令泄气，然后将云盒居中去塞，则云自出，悠扬涣
散，芬芳四绕，可以醒脾胃舒肝郁而和经络，令人有 然出尘之想。
治哑瘴。余澹庵云∶滇广山瘴，有一种人受之终身不能语，名曰哑瘴。唯闻白云之气，
久久
自引毒外出，可以全愈。
血臌水肿，闻云气渐消。
苦碱无毒，治大热，消渴去烦，除邪下蛊毒，柔肌肤，去湿热，消痰，磨积块垢腻，多
服损
人。（食纂）
纲目有盐胆水，乃已烧成盐复沥下之苦卤，一名卤水。此乃取于卤地，沥以烧盐之用，与盐
胆水不同。
俞佳士的妙应方：治疗痞块（腹内结块）。在八月白露节气之后，收集糯稻顶端的露水，晚上分两次服用，喝下后痞块立即消散。
按语：各种草木都需要天上的露水滋润才能润泽，只有水稻到了酉时（下午5点至7点），其根部津液润气逐渐上升，进入夜晚到达叶尖，到早晨又自上而下回归根部，所以没有露水的夜晚，稻叶依然独自湿润，陈翠虚的诗句“一些珠露，阿谁运上稻花头”说的就是这个道理。
云是山泽之气，蒸腾而成云，属于水类。因此归入水部。云有五种颜色；只有白云可以治病，唐守时说：凡是高山大川，都有云气，五岳名山，多出产云。山曾采集云气赠送客人，他取云的方法是，用金漆盒，盖上凿一个孔，用木塞堵住。等到天气晴朗，黎明时分前往山岩石旁寻找，见地上有白云如线状、如笋状，从土中长出，这就是云苗。急忙用盒子盖住孔对准云气，让云气全部进入盒中，用木塞塞住口。收藏必须用白云，像雪的颜色，有梅花和兰花的香气，才符合药用要求。其他杂色的云，多带有草土气味，黑云尤其腥臭，多带有怪物气息，不适合用盒子收取。释放云气的方法：选择洁净的房间，必须四面有窗户，上下用纸裱糊，不让气体泄漏，然后将云盒放在房间中央去掉塞子，云气自然出来，悠扬散开，芬芳四绕，可以醒脾开胃、疏肝解郁、调和经络，让人产生超脱尘世的念头。
治疗哑瘴（一种导致失语的瘴气病）。余澹庵说：云南、广东的山地瘴气，有一种人受此邪气终身不能说话，名叫哑瘴。只要闻到白云的气味，久而久之自然将毒素引出体外，可以完全痊愈。
苦碱无毒，治疗大热症，消除口渴去除烦躁，驱除邪气并向下排出蛊毒，使肌肤柔嫩，去除湿热，消除痰饮，磨碎积块垢腻，多服会损害人体。（出自《食纂》）
《本草纲目》中有盐胆水，那是已经烧制成功的盐再次沥下的苦卤，又名卤水。这是从卤地取得的，沥下来用于烧盐，与盐胆水不同。
Yu Jiashi's Miaoying Prescription: Treats *pi kuai* (abdominal masses). Collect the dew from the tips of glutinous rice plants after the White Dew solar term in August. Take two doses in the evening; upon ingestion, the masses will dissipate immediately.
Note: All herbs and trees require heavenly dew to become moistened. Only rice, when it reaches the You hour (5 PM–7 PM), sees its root moisture gradually rise, reaching the leaf tips at night, and returning to the roots by dawn. Therefore, on nights without dew, rice leaves remain uniquely moist. This aligns with Chen Cuixu’s verse: "A few drops of pearl dew, who carries them up to the rice flower heads?"
Clouds are formed from the vaporization of mountain and marsh qi; they belong to the Water category. Thus, they are classified under the Water section. Clouds come in five colors; only white clouds can treat diseases. Tang Shoushi stated: "All high mountains and great rivers have cloud qi; the Five Sacred Mountains produce much cloud." Shan once collected cloud qi to offer to guests. His method for collecting clouds was as follows: use a gold-lacquered box with a hole drilled in the lid, plugged with wood. Wait for clear weather, go to the rocksides of the mountain at dawn, and look for white clouds on the ground that resemble threads or bamboo shoots emerging from the soil; these are "cloud seedlings." Quickly place the box cover over the hole to capture the qi, filling the box completely, then plug the mouth with wood. One must collect white clouds that are snow-white in color and possess a fragrance like plum blossoms and orchids to be suitable for use. Other mixed-color clouds often carry grassy or earthy odors; black clouds are particularly fishy and may contain monstrous elements, making them unsuitable for collection in boxes. The method for releasing cloud qi: select a clean room with windows on all four sides, paste paper over the openings to prevent leakage, then place the cloud box in the center of the room and remove the plug. The cloud qi will naturally emerge, drifting gracefully and dispersing, surrounding the space with fragrance. It can awaken the spleen, soothe liver depression, harmonize meridians, and inspire thoughts of transcending the mundane world.
Treats *ya zhang* (aphonic miasma). Yu Dan'an said: In the mountainous regions of Yunnan and Guangdong, there is a type of miasma that causes individuals to lose their voice permanently, known as aphonic miasma. Merely inhaling the scent of white clouds over time will naturally draw the toxin out of the body, leading to complete recovery.
For *xue gu* (blood distension) and edema, inhaling cloud qi leads to gradual resolution.
Ku Jian (Bitter Alkali) is non-toxic. It treats severe heat, eliminates thirst and irritability, expels pathogenic factors and downward-disperses gu poison, softens the skin, removes damp-heat, resolves phlegm, and grinds down accumulations and greasy deposits. However, excessive consumption damages the human body. (*Shi Zuan*)
*Bencao Gangmu* mentions Yan Dan Shui (Salt Gall Water), which is the bitter brine obtained by leaching salt that has already been fired, also known as Lu Shui (Brine). This refers to brine extracted from saline land for the purpose of firing salt, which is different from Yan Dan Shui.