5 Iodofuran 2 Carbaldehyde

In "Heavenly Works", mercury is also water, and its properties are very special. Mercury is often liquid, colored like gold, and has a golden light. Under normal conditions, it is not as hard as other gold, and it flows like water. However, its density is large, and the sense of gravity is very clear.
The chemical properties of mercury are very active. It can form alloys of gold, and this alloy can be easily combined with mercury. If gold meets, it can be easily combined with gold to form gold and mercury. The ancients often used this property to extract gold, capture gold with mercury, and then add mercury to obtain gold.
Mercury can also generate sulfur and react, and the two can combine to form mercury sulfide. The color of mercury sulfide, vulgar sand, is an important raw material and raw material in ancient times. This reaction is very strong, and the two are mixed together. With a little grinding, it will combine.
Furthermore, mercury is easily damaged, forming mercury vapor. Mercury vapor is toxic, inhaling human body, causing serious harm to health, causing people to suffer from diseases such as pain, fatigue, insomnia, and emotional insufficiency. However, the ancient people did not know the harm, and were often poisoned by exposure to mercury and its vapor.
Mercury has similar properties, but because of its toxicity, it must be used with caution. In ancient times, people's understanding of mercury was initially used for gold extraction, mining materials, etc., and its toxicity was gradually realized, reflecting the lack of depth of the ancient people's understanding of the environment.

In "Tiangong Kaiwu", the main uses of rice are as follows:
First, it is the bulk of food. People take food as their heaven, and rice is a key component of the daily staple food of the people. The rice is hulled into rice by processes such as pestle and pestle, and after cooking, it is a meal that nourishes the people. Its taste is soft and waxy, easy to digest, and both rich and noble families and ordinary people depend on it for their livelihood. "Rice is bran for A, rice for B, and chong damages A, but benefits B." It can be seen that rice, as a staple food, is important to people's livelihood, and is the basis for maintaining life and providing energy.
Second, it can be used to make wine. Rice has the characteristics of fermentation, and through ingenious craftsmanship, it can be turned into fine wine. "Where wine is brewed, it must be used to If there is no Qu, it is good rice and rare millet, but it cannot be made in the air. "After the rice is boiled, mixed with wine koji, etc., through fermentation, distillation and other links, the wine brewed has a mellow taste. Wine is indispensable in ceremonies, banquets and other occasions. During sacrifices, it is used to worship the ancestors of the gods. When feasting, it adds a joyous atmosphere, or it is something to relieve worries and sorrows. Rice is of great significance when brewing wine.
Third, raising livestock. The leftovers of rice, such as rice stalks, are livestock feed. Cows, sheep and other livestock can eat rice stalks to supplement nutrition." After the autumn harvest, the rice stalks in the field are collected to prepare for livestock to eat in winter. " This not only solves some livestock feed problems, but also realizes resource recycling, provides support for other aspects of agricultural production, guarantees the development of animal husbandry, and forms a virtuous circle of agricultural ecology.

In "Tiangong Kaiwu", there are two sources of mercury, one is to take Dan sand, and the second is to smelt lead and mercury.
If mercury is made from Dan sand, first put the Dan sand in a closed kettle, and then calcine it under fire. The Dan sand decomposes when heated, and the mercury gas rises. When cold, it condenses in the lid of the kettle. If it is exposed to stone, mercury can be obtained. This is a commonly used method in ancient times. Due to the high mercury content of Dan sand, the decomposed mercury is pure.
Mercury is smelted with lead and mercury, and lead is mixed with mercury-containing ores and mixed into the furnace. Lead is active and has an affinity with mercury in mercury ores. At high temperatures, mercury and lead fuse together. After distillation, the boiling point of lead is higher than that of mercury, and the mercury is vaporized first, and then condensed into a liquid state, which is separated from the lead.
However, compared with the two, taking Dansha to make mercury, although Dansha is rare and expensive, the mercury obtained is of high quality and few impurities; the method of refining lead and mercury, lead and ore are easy to find, and the cost is slightly lower. However, mercury contains or contains lead and other impurities, which need to be refined before it can be purified.
As for the specific operation, in the method of Dansha, the control of the heat is the key. If the fire is fierce, the Dansha will decompose quickly, and the mercury gas will be difficult to recover. In the method of refining lead and mercury, the ratio of lead and mercury and the distillation temperature need to be accurately pinched. If the ratio is improper, the mercury will be difficult to extract, and if the temperature is inappropriate, the separation of lead and mercury will be poor.

I have a question today, what is the market price of B crab? I want to answer it in the words of "Tiangong Kaiwu".
I have heard that in "Tiangong Kaiwu", the price of various products often changes with the weather, geographical location, supply and demand. The price of B crab is also difficult to determine.
When the production was prosperous, among rivers, lakes and seas, B crab proliferated, and there were many catchers, and many people entered the market. At that time, its price was flat. In the market, at an ordinary price, it was rarely available. For example, during the period of crab flood, in the land of the water town, or for a few dollars, you can buy a crab for cooking needs.
However, if the seasons change, unless it is in its prime, the number of B crabs will gradually decrease. In addition, there may be disasters that affect its reproduction and growth, resulting in insufficient supply in the market. And the world's kindness to B crabs has not been slightly reduced, and there are many people who ask for it. At this time, its price must be high. In prosperous cities and rich homes, if you want to enjoy the taste of B crabs, you may need to buy them with a lot of money, or even if a crab is worth two silver dollars, you don't know.
There are also regional differences, water towns, where B crabs are produced conveniently, and the price may be slightly cheaper. In remote places, the transportation is inconvenient, and the transfer of B crabs is difficult, so the price will increase accordingly. Even at the same time, the price is also different from north to south.
Furthermore, the quality of B crabs is different, and the price is also different. If the body is fat and ointment is overflowing, the price will be higher than usual. And the price of lean and inferior crabs is inferior.
Therefore, if you want to know the market price of B crab, you must check its season, origin, supply and demand and quality factors, and comprehensively, you can get a more accurate price. Not a word can be said.

"Tiangong and Objects" is a masterpiece of science and technology written by Sung Xing in the Ming Dynasty, and it is a multi-technology and object work. As for "What is the storage of A", according to this description, it is briefly repeated as follows:
A, that is, sex likes, so it is stored in A, the first level of the environment. If it is stored in a room, it can be placed in a place that is not well connected, and it can be stored in a bamboo or tile tank. At the bottom of the bamboo or tile tank, it is made of tidal sand, which is thick and inch thick. This sand is not only protected, but also for the storage of A, which is suitable for its nature.
A If the temperature is high, the nail will be accelerated, and the oxygen consumption will increase, which is easy to cause fatigue, less food, and long-term shadow vitality; if the temperature is low, the nail will enter hibernation, but it will not survive in the environment, and it will also be harmful to its survival. Therefore, in the summer, it is advisable to place the nail in a cool place, or reduce the temperature of the water; in the cold winter, it is necessary to keep warm, and it can be wrapped in grass and other things outside the container.
Furthermore, the nail needs sufficient oxygen. Do not use any container to store, to ensure that it is well preserved, in order to prevent the nail from dying due to lack of oxygen. If you use a water tank, do not close the tank mouth, you can leave a little gap to allow the air to circulate.
In addition, the armor has good health and is easy to climb. The container should be stored at a certain height to prevent it from escaping. At the same time, it should not be co-located with fierce or aggressive objects to avoid damage.
Therefore, according to the concept of natural objects contained in "Tiangong", the storage of armor needs to be combined with the environment, the appropriate degree of resistance, sufficient oxygen and escape prevention, etc., in order to protect the vitality of armor and save more.