Do inanimate objects have anything to do with weather?

Living things are natural "rain gauges", and inanimate things are also "meteorological instruments". With the change of natural environment and weather conditions, many inanimate objects will have some different signs, which can also predict the change of weather.

"The footstone is sweating, it's going to rain." The footstone under the wooden column in the hall absorbs heat quickly and dissipates heat quickly. Generally, the temperature of indoor cornerstone is always lower than that of air. If the air contains more water vapor, then when the air touches the stone surface, the temperature drops and the water vapor reaches saturation, it will condense into small water droplets on the stone surface, just like the sweat on the human head. This shows that the humidity in the air is already very high, and it will rain soon. The square brick concrete floor is wet again, which also indicates that it will rain soon.

"The cylinder wears a skirt and it rains heavily." The water tank is filled with fresh water, and the temperature is lower than that of air. Before it rains, the air temperature rises and the temperature of the air in contact with the water tank decreases. When the water vapor reaches saturation, the outer wall of the water tank condenses into water droplets, which drop downwards, as if putting a skirt on the water tank. This is a sign that there will be heavy rain in the future.

"The salt is out, the iron is sweating, and it's going to rain." Salt has strong hygroscopicity. When the air temperature rises, it absorbs moisture, then becomes moist and produces water. Iron transfers heat quickly and cools quickly, and the temperature of iron block is generally lower than the surrounding temperature. When water vapor meets iron, it is easy to condense into small water droplets, just like sweating on people. Salt comes out of the water and iron sweats, which indicates that the weather will turn to rain.

"The salted fish and bacon are dripping again. It's going to rain heavily." In winter, the air is dry and the salted fish and bacon are loose. But before the continuous spring rain, the air is humid, salted fish and bacon will regain moisture and drip, and there will be strong winds and heavy rain.

"The smoke fell to the ground and it rained." In the countryside, every household burns stoves and smokes, which is another scenery. Usually, the smoke from the chimney rises into the air first, and then drifts obliquely with the wind direction. Sometimes the smoke from the chimney does not rise into the air, but rushes to the ground, or diffuses in the air around the roof, or even slowly emerges from the chimney, so that the fire in the furnace cavity is not prosperous. Why is this? It turns out that the stoves in rural areas are all burned with straw, wheat straw and branches, and the smoke produced is composed of many tiny carbon particles, which can easily absorb the moisture in the air. At the same time, the gas discharged after combustion also contains sulfur dioxide, which reacts with moisture in the air and becomes small water droplets suspended in the air. When the ash becomes heavier, it is not easy to rise and spread around the roof, indicating that there will be continuous rainfall.

"The grass ash forms a cake, and the storm is coming." Grass ash is the ash after burning straw and rice straw, which is usually dry and loose. When the weather turns cloudy and it is about to rain, the grass ash in the stove often forms a "cake", which indicates that there will be wind and rain. This is because plant ash is mainly a compound of carbon, potassium and sodium, which can easily absorb water vapor in the air. Before it rains, the water vapor in the air increases, and plant ash absorbs the water vapor to form a "cake" (block), which is not the case in sunny days.

An agricultural proverb says, "After the fire stays in the stars, it will clear up." "After a long time of clearing up, the fire will extinguish the coal, and the Lord loves the rain." That is to say, on a long cloudy day, when the oil lamp goes out, the snuff is as red as charcoal fire and slowly goes out, indicating that it will clear up tomorrow; On a long sunny day, when the oil lamp goes out, the snuff will go out, which indicates that it will rain tomorrow. It turns out that when the oil lamp goes out, the weather turns fine, there is less water vapor in the air, the temperature drops slowly, and the red color will clear up if it is displayed for a long time; When the weather turns cloudy, the water vapor in the air increases and the carbon particles cool faster, so the red color lasts for a short time and it rains as soon as it blows.