Propane 1 Iodo 2 Methyl

"Tiangong Kaiwu" says: "Where the lead bobcat is the ore of lead and tin, its quality is mixed, and its nature is strong and brittle."
Lead bobcat, that is, lead-zinc ore, has unique physical properties. The color of the lead bobcat is often gray-black or brown, dull, not as dazzling as gold and silver, but also has a unique and simple color. Its shape is mostly block or granular, and it is produced by polymerization. It varies in size, or is like a fist, or like a bean, and it is impermanent to gather and disperse.
In terms of its hardness, although it is not as strong as gold and stone, it is not easily broken. It is rigid and brittle, and it is easy to break due to external forces. If it is not tough, it can be bent and broken. Its density is higher than that of ordinary earth and stone. When placed in the hand, it feels quite sinking. This is because it is rich in metal components.
And the lead bobcat has a certain luster. Although it is not dazzling, it also has a faint light flickering under the light, which seems to hide metal. Its texture is rough, and when you touch it, you can feel the concave and convex of the particles, which is not as warm and smooth as beautiful jade.
The physical properties of the lead bobcat lay the foundation for the smelting of lead and tin and other metals in later generations. Because of its brittleness and easy crushing, it is easy to crush and process after mining; if it has a high density, it is conducive to separation and enrichment by gravity beneficiation; and the metallic luster contained also provides clues for the identification and refining of metals. According to this material property, people have to refine lead and tin from lead bobcats, which are used in the manufacture of many utensils and have a profound impact on production and life.

Jiagu, Yigu, Dianhuo, and Ding Huo each have their own characteristics in the five elements and contain many chemical properties, as detailed below:
- ** Jiagu **: Jiagu is a yang wood with strong sex and the ability to grow hair. From a chemical perspective, it may be a metal element with strong activity, which is prone to losing electrons in chemical reactions and exhibits strong reduction. For example, when encountering acids, it can undergo a displacement reaction with them, such as metal zinc reacting with dilute sulfuric acid to release hydrogen. In this reaction, zinc atoms lose electrons to form zinc ions, just like Jiagu in the five elements, which has strong hair generation power and is easy to apply to other substances.
- ** Otsuki **: Otsuki is a yin wood, which is supple in nature. Although its germination force is not as strong as that of the turtle wood, it is more resilient and flexible. From a chemical perspective, Otsuki can be compared to the structure containing carbon chains in organic compounds. Although the reactivity is not very high, it can construct complex chemical structures through various chemical reactions. For example, in organic synthesis reactions, carbon chain compounds are added and replaced to generate various organic products, reflecting the characteristics of Otsuki to adapt to changes and derive all things.
- ** Bing Fire **: Bing Fire is a yang fire, which is violent in nature and has the characteristics of light and enthusiasm. In the field of chemistry, dioxin fire can be compared to a strong oxidant. In chemical reactions, electrons are easily obtained to oxidize other substances. For example, oxygen reacts with combustibles during combustion reactions, releasing a large amount of heat and light. This violent reaction is in line with the violent and bright nature of dioxin fire, which can quickly cause chemical changes to other substances.
- ** Ding Fire **: Ding Fire is a yin fire, which is mild in nature. Although it is not as strong as dioxin fire, it has the ability to continue to stabilize. From a chemical perspective, Ding Fire is like a slow oxidation process, such as iron rust. Although this process is not as intense as burning, it continues at room temperature. Ding fire, like a mild oxidizing agent, causes other substances to oxidize under relatively mild conditions. Although the reaction rate is slow, it lasts for a long time, reflecting the soft and continuous chemical characteristics of Ding fire.

The genus of A, B, C, D in "Tiangong Kaiwu" has a wide range of uses and is closely related to people's livelihood.
A, often used in farming as a help. Working in the fields, the agricultural tools used are mostly made of Class A materials. A is strong, can be broken and tilled, making the land loose, which is conducive to sowing and crop growth. And the tools made by A are durable and can be operated many times without damage. To ensure the smooth progress of farming, it is related to the food of all people.
B is very useful in the industry of construction. Building houses and cities, B materials are used for pillar structures. Its quality is rigid and flexible, and it can bear the weight of the roof and keep the house stable. And in the construction of bridges, B is the key support, so that pedestrians, carriages and horses can pass through safely. The buildings made by B have stood tall after years of wind and rain, sheltering people from the wind and rain, and settling down.
C, mostly used for military equipment. Sabers and arrows are mostly made of C. C is sharp and tough, and on the battlefield, it can kill the enemy and win, and protect the country. In times of chaos and strife, the weapons made by C are related to the lives of soldiers and the survival of the country. Sophisticated C weapons can greatly increase the combat effectiveness of the army, defend the integrity of the territory, and protect the peace of the people.
Ding is indispensable in the manufacture of daily utensils. The cauldron used in the people's diet, made of Ding, can be used for cooking. Ding's heat transfer is good, which can make food evenly heated and cook delicious dishes. And the tin-made utensils are easy to clean and store, which is a must for home life. And the knives and tools used in daily life are mostly made of Ding, which is convenient for people to work in life.
A, B, C, D, each has its own uses. They are all key to agriculture, construction, the army, and the people. They are either related to survival and reproduction, or to safety and stability, or to the convenience of life. In fact, they are the most important things in the world and are indispensable.

Although the production method of "A, B, B and D monkeys" is not explicitly mentioned in "Tiangong Kaiwu", you can refer to the records of relevant crafts in ancient books and deduce the approximation by traditional methods.
If you use ancient craftsmanship ideas to make A, B and D monkeys, or choose good wood. Good wood should have a tough quality, not easy to break, and delicate texture, which is easy to carve. Wood with straight texture and tight texture in the forest of Xunshan should be cut, dried, and its moisture removed to make it dry and solid. This is the beginning of material making.
The work of carving requires skilled craftsmen. The craftsman should have exquisite skills. First, with a knife and axe, he should cut out the general outline of the monkey, determine its body shape and posture, or squat or stand, or scratch his head, so that his divine shape can appear. Then he should replace it with a fine carving knife to carve the facial hair. The eyes should have a spirit, so that they can show their agility; the hair must be clear, so that they can see their delicacy. The beauty of carving is to give the monkey statue a life, so that it can be lifelike.
If it is a statue, use bronze or the like. First, use mud as a mold to shape the monkey, and carefully repair it to make the mold have both the shape and the spirit. After melting the bronze in a crucible, pour the copper liquid into the mold with a special utensil, and wait for it to cool and solidify. After the mold is removed, it is polished and modified to make the surface of the bronze statue smooth, the details are revealed, and the cast marks are removed, showing the beauty of simplicity.
As for coloring, it is appropriate to choose natural pigments. Cinnabar is red, lime is blue, all colors are ground into powder, and glue is adjusted to make it uniform. Dip the color with a fine pen, and apply it carefully according to the shape and hair distribution of the monkey. The color matching should be harmonious and natural, showing the liveliness of the monkey, but also quaint. In this way, through the selection of materials, carving, casting, coloring and other processes, you can get the exquisite production of A, B, C, D monkeys.

It is necessary to pay attention to the storage and transportation of the two dragons. The details are as follows.
The first word is storage. First, you need to choose a suitable place. It should be dry and well ventilated, and cover the two dragons. It likes dryness. If it is wet and stuffy, it is easy to cause its body to rot and damage its efficacy. Second, temperature is also the key. Do not overheat or overheat. If it is cold, the two dragons may become stiff and lose their agility. If it is hot, the gas will escape and the effect will be weakened. Third, the choice of container should not be ignored. It should be filled with a strong and airtight one to prevent the invasion of insects and ants and avoid the interference of external evil energy.
As for transportation, the first priority is stability. When handling, be careful not to make the bumps violent. If the A-B Erlong is shaken too much, its internal gas will be easily messed up, and it may be used in the future. Second, it is well protected. It needs to be padded with a soft object and sealed properly to prevent the wind, rain and cold from invading the A-B Erlong during transportation. Third, the choice of time is also exquisite. It is advisable to choose a time when the yang is sufficient and the weather is peaceful for transportation. If the wind, rain and dark, or the yin is too heavy, it is not a good time, and it may disturb the nature of the A-B Erlong.
All these are important things that the A-B Erlong should pay attention to during storage and transportation. It must not be ignored. Only by following this can we keep the A-B Erlong intact and make the best use of it.