润肺解暑。
甘平。止消渴。宜煎润肺之药。秋露造酒最清洌。百花上露。令人好颜色。（霜杀物、
露滋
物、性随时异也、露能解暑、故白露降则处暑矣、疟必由暑、故治疟药、露一宿服。）
泻热。
甘寒。解酒热。治伤寒鼻塞。酒后诸热面赤。和蚌粉。敷暑月痱疮及腋下赤肿。立瘥。
（时
珍曰∶阴盛则露凝为霜、干象占云∶天气下降而为露、清风薄之而成霜。）凡收霜、以鸡羽
扫之瓶中。密封阴处。久而不坏。
止瘟泻热。
甘寒。治时行瘟疫。宜煎伤寒火 之药。抹痱良。腊雪密封阴处。数十年亦不坏。（冬
至后
第三戊为腊、腊雪大宜菜麦、又杀虫蝗、用水浸五谷种、则耐旱不生虫、洒几席间、
则蝇自去、淹藏一切果食、不蛀蠹、岂非除虫蝗之验乎、春雪有虫、水亦易败、所以不用。
）
泻热。
甘寒。太阴之精。水极似土。变柔为刚。所谓物极反兼化也。伤寒阳毒。热甚昏迷者。
以一
块置膻中。良。（两乳中间。）解烧酒毒。（藏器曰∶盛夏食冰、与气候相反、冷热相激、却
致诸疾也、食谱云∶凡夏用冰、止可隐映饮食。令气凉耳、不可食之、虽当时暂快、久乃成
疾也、宋徽宗食冰太过、病脾疾、国医不效、召杨介、进大理中丸、上曰∶服之屡矣、介曰
、疾因食冰、臣请以冰煎此药、是治受病之原也、果愈、若此可谓活机之士矣。）以上天水
类。
Moisten the lungs and relieve summerheat.
Sweet and neutral. Stops thirst (Xiao Ke, wasting-thirst syndrome). Suitable for decocting with lung-moistening herbs. Wine brewed with autumn dew is the clearest. Dew from a hundred flowers improves complexion. (Frost kills things, while dew nourishes them; their natures differ according to the season. Dew can relieve summerheat, therefore when White Dew arrives, End of Heat has passed. Malaria must arise from summerheat, therefore malaria remedies should be taken after being soaked in dew overnight.)
Clear heat.
Sweet and cold. Relieves alcohol-heat. Treats nasal congestion due to Cold Damage (Shang Han). For various heats and facial redness after drinking alcohol. Mix with clam powder. Apply to prickly heat sores in summer months and red swelling under the armpits. Recovery is immediate.
(Shizhen said: When Yin is excessive, dew condenses into frost. The *Qian Xiang Zhan* states: Heaven's Qi descends to become dew, and gentle winds blow it to form frost.) To collect frost, sweep it into a bottle with a chicken feather. Seal tightly and store in a shady place. It will not spoil even after a long time.
Stop pestilence and clear heat.
Sweet and cold. Treats epidemic febrile diseases (Shi Xing Wen Yi) during seasonal transitions. Suitable for decocting with herbs for clearing fire in Cold Damage. Effective for smearing on prickly heat. Winter snow sealed tightly and stored in a shady place does not spoil even after decades. (The third Wu day after Winter Solstice is La; La snow is highly suitable for vegetables and wheat. It also kills insects and locusts. Soaking grains in water before planting makes them drought-resistant and insect-free. Sprinkling it on tables and mats drives away flies. Preserving all fruits and foods in it prevents worm damage. Is this not proof of its ability to eliminate insects and locusts? Spring snow contains insects, and the water spoils easily, hence it is not used.)
Clear heat.
Sweet and cold. The essence of Taiyin (Taiyin Jing, the Hand-Taiyin Lung Meridian). Water at its extreme resembles Earth. It changes from soft to hard. This is what is meant by "when things reach an extreme, they undergo contrary transformation." In Yang toxicity from Cold Damage, where heat is severe and causes coma, placing a piece on Danzhong (CV17, located between the two nipples) is effective. (Relieves liquor toxicity.) (Cangqi said: Eating ice in midsummer goes against the climate. The clash of cold and heat leads to various diseases. The *Food Recipe* states: In summer, ice should only be used to cool food and drink, making them refreshing, but should not be eaten. Although it brings temporary relief, it eventually causes disease. Emperor Huizong of Song ate too much ice, developed spleen disease, and imperial physicians were ineffective. He summoned Yang Jie, who presented Dali Zhong Wan (Great Earth Center Pill). The Emperor said: I have taken it many times. Jie replied: The illness is caused by eating ice. I request to decoct this medicine using ice, thus treating the root cause of the disease. Indeed, he recovered. Such a person can be called a practitioner of flexible methods.) Above are the categories of Heavenly Waters.