2-pyridinemethanol

Fuyang flintlock is made of gold. Its shape is round, and it can concentrate light and make fire in the middle. This is the physical characteristic of yang flintlock. Its light-gathering is also made of gold, which has good reflectivity and can concentrate the brilliance of the sun at one point. And its shape is round and the light shines on it. According to the principle of light reflection, they all gather in one place, and then it generates high temperature and starts fire.
Those who are also magnets, those who are magnetic to stones. Its properties can attract iron, which is well known to everyone. Cover magnets have magnetic fields, and iron enters their fields and attracts each other by magnetic force. Looking at the poles of magnets, the magnetic force is particularly strong, which can make iron very solid.
Furthermore, the wooden kite is made of wood, and it is like a public loss. The wooden kite can fly by the power of the wind. Its shape is like a bird, and its wingspan is light. When placed in the wind, the wind blows its wings. According to the principles of fluid mechanics, the speed of air flow above and below is different, and the upward force is generated, so that the kite can soar in the air. Although the ancient people may not have known much about the principle of flight, it is a manifestation of wisdom to be able to make this thing.
As for the compass car, it has a delicate structure and built-in mechanisms. No matter how the car turns, the fingers of the wooden people on the car always point to the south. Physics here is related to mechanics and mechanical principles. When the car is moving, the transmission between the wheels and axles uses gears and other devices to keep the wooden man oriented, so as to achieve the effect of a guide.
All these things, the sun's flint's light to make fire, the magnet's iron, the wooden kite's wind-driven flight, and the directional guide of the guide car, all show the ancient people's exploration and application of physical characteristics. Although it is different from today's science, the wisdom of the time should not be underestimated.

Mercury, its elemental mercury is the only liquid metal at room temperature, with a silver luster, heavy quality and good fluidity. Its chemical properties are unique, and it can form amalgam with many metals, such as sodium and potassium.
Mercury is slightly more chemically active than precious metals such as gold and silver, but weaker than common active metals. In air, mercury is relatively stable at room temperature and is not easily oxidized. However, when heated, mercury can combine with oxygen to form mercury oxide. This reaction is an important chemical transformation, which shows that mercury can chemically react with oxygen under certain conditions.
Mercury can react with sulfur elemental matter, and the two combine to form mercury sulfide. This reaction is extremely rapid and violent, and the nature of mercury sulfide is stable, and the color is often red. Therefore, when dealing with mercury leakage, it is often covered with sulfur powder, and the two react rapidly to fix mercury and prevent mercury from volatilizing and causing harm.
Mercury salts also have unique chemical properties. Such as mercury nitrate, mercury chloride and other mercury salts, can undergo metathesis reactions with many substances. Some mercury salts can react with alkali in solution to form precipitation such as mercury hydroxide, but mercury hydroxide is unstable and easily decomposes into mercury oxide and water. In addition, mercury salts can also undergo replacement reactions with some metals. Active metals can replace mercury from their salt solutions, which is a manifestation of the sequence of metal activity.
Mercury compounds also have various chemical properties. Mercury oxide is easily decomposed when heated to regenerate mercury and oxygen, which is a typical decomposition reaction. Although mercury sulfide is stable, it can also react under specific conditions, such as high temperature and the presence of oxygen, to form products such as sulfur dioxide and mercury. Mercury has complex and unique chemical properties, and has long been recognized and applied in ancient alchemy and other fields.

The common synthesis methods of his mother and uncle are mostly processed according to ancient methods. Everything involved in "Tiangong Kaiwu" is based on the wisdom of predecessors, and there are also rules for the synthesis of many materials.
Common synthesis, the first selection of materials. Excellent selection of materials is the foundation of synthesis. If you want to make exquisite utensils, the materials used need to be tough in texture and pure in quality. As far as metal utensils are concerned, the choice of copper and iron requires less impurities and high purity in order to create excellent utensils.
Secondly, fire control is crucial. The size and duration of fire affect the quality of the synthesized object. When forging swords, if the fire is large, the metal is easy to melt and deform, and if the fire is small, it is difficult to achieve the required hardness and toughness. It is necessary to accurately grasp the heat according to the material, shape and purpose of the object. Taking copper smelting as an example, first melt the copper ore into a liquid state with a large fire, and then turn to a small fire to slowly remove impurities, so that a pure copper liquid can be obtained for casting all kinds of copper utensils.
Furthermore, the synthesis steps are also determined. First prepare all the materials in proportion, put them in an orderly manner, and do not disrupt them. For example, when preparing medicinal pills, the order and dosage of each medicinal material are strictly stipulated, and the difference is very small, which is thousands of miles away.
When synthesizing, with the help of foreign objects. If you want to build iron tools, you need to use a bellows to make the fire more prosperous, so as to achieve the purpose of high temperature melting. For example, when firing ceramics, special pottery utensils are placed in the kiln to assist in controlling the temperature and airflow, so that the ceramics are heated evenly and of high quality.
The method of synthesis is not achieved overnight, and requires craftsmen to accumulate experience for many years, practice and ponder repeatedly, in order to master it proficiently and make exquisite and high-quality composites. This is a skill inherited by the ancestors, which should be carefully studied and carried forward.

In the realm of agriculture, it is related to cultivation and planting. When spring comes, the yang qi rises, and the soil paste is slightly moist. Farmers observe the sky, depending on the ups and downs of the yang, and work on crops. When the yang qi is smooth, the seedlings are vigorous and fruitful; if the yang is not adjusted, or cold or summer, it can cause crops.
In the industry of craftsmanship, it also depends on the help of the yang. To create a palace, it is necessary to choose a sunny land to welcome the light and avoid the dampness. Where utensils are used, when the yang is dry, the material is easy to fix, and the paint is easy to fix. And the yang and the qi make the craftsman's mind agile and his craftsmanship advanced.
On the road to medicine, the yang is one of the righteous qi of the human body. Doctors use yin and yang to discuss diseases. When the yang is prosperous, the health will be healthy, and when the yang is deficient, the disease will occur. The way to cure diseases, or replenish the yang to drive away cold, or dissipate the yang to clear heat. Looking at the four seasons of yang, adjust health and rest, nourish the yang in spring and summer, and nourish the yin in autumn and winter, which can protect the body.
In the world of travel and travel, the sun is mostly auspicious. Business travel, when the sun is prosperous, the road is safe and the transaction is smooth. Pedestrians climb mountains and wade in water, the sun shines, the path can be discerned, and the risk is avoided.
And in the ceremony of sacrifice and prayer Take the sun as the light, as the right, sacrifice it to show sincerity, pray for the blessing of the gods, the peace of the family and the country, and Li Shu Kangfu. It is a certain Yang, which is of great use in agriculture, craftsmanship, medicine, travel, and sacrifice. It is indispensable.

I look at what you are asking, but I am inquiring about the market price range of a certain armor. However, the system of armor is different from ancient and modern, and the material, craftsmanship, age, and appearance of many factors all affect its price, which is difficult to hide.
Ancient armor, if used by ordinary soldiers, take leather armor as an example, its materials are easy to obtain, and the craftsmanship is not very refined. In the city at that time, or it is worth a few dollars. Those who are in the area, the rope of money, usually thousands of words per square meter. Such leather armor has limited protection and is only basic protection, so the price is not high.
If it is a sophisticated iron armor, its forging requires good iron, and the craftsmanship is complicated and time-consuming. Craftsmen carefully build, quenching, grinding and other processes must not be sloppy. Such iron armor was worth dozens or even hundreds of tons in the city at that time. Because of its excellent protective performance, it is favored by generals or elite people, so the price is high.
As for armor of a long time and special significance, such as those who have experienced major wars and written by celebrities, it is not based on the ordinary market price. Or it is hard to find a thousand gold, or in the royal treasury or the hands of collectors, it is rare to enter the folk market.
Today, armor is mostly used for collection and display. Imitations vary in price according to the fineness of craftsmanship and the quality of materials. < Br >
If it is an unearthed ancient armor, it belongs to the category of cultural relics, and it is strictly prohibited to buy and sell it without permission. Its value is not measurable for money. It is a treasure of history and culture. It should be properly collected and studied by the state.
Therefore, the market price range of a certain armor, from a few hundred yuan imitation to a priceless antique, has a huge span, and it is necessary to study its specific situation in detail.