米中放螃蟹壳，日久不生虫。梨用萝卜隔开，小萝卜整用，大萝卜切开用，勿使相着，
用竹篓收藏。忌木器，经年不坏，屡试屡验。
香橼收法与梨同。橙、橘、以绿豆拌收，经久不坏，用松毛包藏，三、四月不干。用有
盖新瓦罐。每罐放一个，密封，藏楼上，更可经久，此法最妙。
书中藏芸香（又去七里香）可辟蠹。枝叶皆可用。笔用硫黄水浸过，收藏不蛀。或用川
椒
烧
一
凡古井及五月井中恐有毒，淘井者不可轻入，先以鸡毛投入试之，毛直下者无毒，回施
者有毒，以好醋数斗倾入，则可下矣。
黄蜡、松香、槐花、浮水石各一斤，共为细末熔化，用灯芯浇成烛，一昼夜只点一寸。
凡衣被污坏，总以先用滚水泡透，再照后开各方加洗∶墨污者饭洗，或枣洗、或灯草洗
；黄泥污者姜汁洗；血污者萝卜汤洗、或小便洗；疮毒脓血污者牛皮胶洗；漆污者先用油洗
水搓，再用杏仁嚼洗；蓝靛污者杏仁嚼洗；膏药污者或用油洗、或用滚酒、或用灶心土；槟
榔水污者白醋洗；酒、酱、醋污者藕汁洗；清油污者蜜洗、或萝卜水洗；猪油污者栗子洗；
牛羊油污者锻石洗；桐油污者豆腐渣洗；烟油（又名烟屎）污者瓜子嚼洗，或用米洗。
Place crab shells in rice; after a long time, it will not produce insects. Store pears separated by radishes: use whole small radishes or cut large radishes, ensuring the pears do not touch the radishes directly. Store them in bamboo baskets. Avoid wooden containers; this method preserves them for years without spoilage, and has been repeatedly verified.
The preservation method for Citrus medica (Xiangyuan) is the same as for pears. For oranges and tangerines, mix with mung beans for storage to prevent spoilage over time. Wrap them in pine needles for storage so they remain fresh for three to four months without drying out. Use new glazed earthenware jars with lids, placing one fruit per jar, sealing tightly, and storing on an upper floor for longer preservation; this method is excellent.
Placing Ruta graveolens (Yunxiang, also known as Quqili Xiang) in books can repel bookworms. Both leaves and branches are usable. Soak brushes in sulfur water before storing to prevent insect damage. Alternatively, smoke them with Zanthoxylum bungeanum (Chuanjiao).
Ancient wells and wells dug in the fifth lunar month may contain toxins. Those cleaning wells should not enter lightly. First, throw chicken feathers into the well to test: if the feathers sink straight down, there is no toxin; if they float and swirl, there is a toxin. Pour several dou of good vinegar in, and then it is safe to enter.
Mix Huangla (Cera Flava), Songxiang (Pini Resina), Huaihua (Sophorae Flos), and Fushuishui Shi (Lapis Aquae Fluitantis) each weighing one jin, grind them into fine powder, melt them together, and cast candles using wicks made from Juncus effusus (Dengxin). These candles burn at a rate of only one cun per day and night.
One Hu Tao (Juglans regia, also known as Hetao), heated until half-red, buried in hot ashes, will not burn out for three to five days.
For any clothing or bedding that is stained or damaged, always first soak thoroughly in boiling water, then wash according to the following specific prescriptions: For ink stains, wash with rice, or dates, or Juncus effusus (Dengcao); for yellow mud stains, wash with ginger juice; for blood stains, wash with radish soup or urine; for stains from sores, toxins, pus, and blood, wash with Niu Pi Jiao (Colla Corii Asini); for lacquer stains, first wash with oil and rub with water, then wash with chewed apricot kernels; for indigo stains, wash with chewed apricot kernels; for plaster stains, wash with oil, or boiling wine, or Zao Xin Tu (Caulis Longanae); for Areca catechu (Binglang) water stains, wash with white vinegar; for wine, soy sauce, and vinegar stains, wash with lotus root juice; for clear oil stains, wash with honey or radish water; for pig fat stains, wash with chestnuts; for cattle or sheep fat stains, wash with Duanshi (Calcined Alum); for tung oil stains, wash with tofu dregs; for tobacco tar stains (also known as Yan Shi), wash with chewed melon seeds or with rice.