Chapter 489 Practice is the key to the door of truth (seeking a monthly ticket)
Late at night on the ninth day of survival in the Banna rainforest.
In the shelter, slight snoring sounded.
On the slope not far away, a huge black shadow slowly poked out of the bushes, staring at the shelter. A few minutes later, the sound of thin ropes turning over the soil was heard.
The snoring stopped.
Bi Fang opened his eyes and stared blankly at the roof of the shed. He sat up and scratched his hair. He picked up a stick cut into fish scales, dipped it in some oil, lit it and went outside the wall.
Under the light of the fire, the sound of turning earth suddenly stopped.
After staring at each other in confusion for a few minutes, Bi Fang groggily closed the bamboo raft door and threw the torch into the bonfire.
continue to sleep.
...
Early morning on the tenth day.
The sun shines in from outside the door.
Bi Fang yawned, chewed lemongrass mixed with charcoal, bit a tree stick for a while, brushed his teeth, and washed his face with water before he finished washing.
After taking care of personal hygiene and filling it with charcoal ash and soil, you can start the live broadcast.
"Good morning, brothers."
【Good morning, Boss Fang!】
【Why don’t you have any sisters, woo woo woo】
【Shocking and cold, when will we women stand up】
[Was the water monitor attacked at night? 】
[Looks like Lao Fang slept well? Is the water monitor gone? 】
"It didn't leave." Bi Fang asked the drone to follow him and came to the opposite position from the door.
It was originally a small soil slope covered with shrubs. There was a stream and a river in front of it, and there were soil slopes and shrubs in the back. The shelter could be considered to be surrounded by mountains and rivers.
But now, the small slope has become completely different. A dark cave has appeared at the bottom of the slope, and the soil has been dug out and piled up in a circle in the cave, like a trench.
"It's in there now."
This is......
Zhou Weisheng straightened up and looked at this scene with some surprise.
Due to the emergence of water monitor lizards, Zhou Weisheng got up early in the morning to watch the live broadcast, just to get a deeper understanding of the status of water monitor lizards in his reserve.
Usually, team research and tracking are carried out in large and small groups. There are at least seven or eight large teams, setting up camp and equipped with various instruments. The animals are scared away when they see it. It is rare to sneak in secretly like this. The opportunity is rare.
Now it seems that you have settled here?
Monitor lizards like to lay their eggs in tree holes and caves, which is indeed a familiar style.
Bi Fang said speechlessly: "I was woken up once last night. I held a torch and went out to look. I saw it had dug a hole here. I looked again this morning and found that the hole had been dug. The whole family was here."
Inside, I don’t know when I ate the fish in my fish pond.”
Bi Fang walked around for a few steps and came to the wall.
He had cleared the bushes in front of the shelter long ago, leaving an open space. There were three large pits on the ground, each half a person deep, each with a different function.
One puddle holds fish, one holds iron bacteria, and the last holds clay.
Once harvested in the fishing ground, it must be taken away in time, otherwise a large number of fish will be crowded together, which will affect the subsequent harvest.
There were originally six fish in the fish pond, but Bifang ate two yesterday, so there should be four left.
As a result, when I saw it this morning, there were only two left. Whose stomach had the remaining two got into? Bifang had no doubt that the culprit was the water monitor lizard not far away.
It seemed that he felt some kind of resentment.
The water monitor emerged from the hole, stared at Bifang motionless, and spit out a long letter.
"Your sister's."
Bi Fang rarely swore loudly and kicked a small clod of earth away, which hit the slope and splashed a small piece of dust.
[So deep resentment]
【Wo Ri, our male and female protagonists are now living together?】
[Water Monitor: Great, the canteen is closer to home, and fresh fish can be produced every day! 】
[Yes, I did it, what can you do? Come and hit me (slap vigorously with your paws, national first-level protected animal certificate)]
[Live in Bengbu]
[Is Guoyi so arrogant? Give me one when you can, I am also a first-class waste who just eats and waits to die, woo woo woo]
Bi Fang shook his head, forget it, let it go, there is a big project waiting for him to do today.
Perhaps it was because the sun was so bright today that there was even fog in the Banna rainforest in the early morning.
Looking at the mist in the forest, Bi Fang suddenly remembered the miasma he mentioned before, and a bolt of lightning flashed through his mind.
"I finally understand why many people think that miasma is a poisonous fog, and the ancients would attribute the cause of illness to words like 'miasma' that obviously have gas connotations!"
【Why?】
Many people scratched their heads and asked questions.
"The so-called flowing water does not rot. On the one hand, the flowing water draws oxygen into the water, and on the other hand, it turns the low-oxygen water below to absorb oxygen. Therefore, the organic matter decomposes quickly and microorganisms are less likely to accumulate."
"Furthermore, flowing water will wash away the eggs, making it difficult for mosquitoes to breed. Therefore, although large rivers have a lot of water and bring humid air, they may not directly cause diseases."
Mushrooms
"When the ancients talked about miasma, they generally didn't mean the agricultural areas in the open valleys, but they said there was miasma in the surrounding mountainous areas. It can be seen that miasma cannot simply be described as hot and humid air."
Bi Fang added some water to the clay pit and continued to stir.
The evaporation overnight made the clay pit somewhat stagnant.
"Standing water is the most likely to breed bacteria, which requires the existence of many depressions lower than the surrounding areas to store rainwater, and such depressions are common in most places."
"Even if the ground surface is sloped, fallen trees and fallen rocks often create small depressions. Last year I went to Daxinganling and saw many similar depressions, puddles, or small swamps in the forest. Of course, they are all
Frozen."
What Bi Fang was talking about was the time he went to Mohe, where it was so cold that the ground was covered with frozen "ice puddles." Based on what he saw and heard this time, he completely understood why "miasma" was "miasma"
", rather than "miasma water" or "miasma soil".
"It's just that there is less rainfall in the north, and the depressions will dry up on sunny days and freeze in winter, while in the south there is more rainfall and high temperatures, so the depressions become a 'bacterial soup' rich in organic matter and a 'nursery' for mosquitoes."
"These have become a serious threat to humans, mammals that no longer have body hair. They are especially terrible for northerners who are not adapted to southern flora, causing harm that goes far beyond being acclimatized."
"Usually, water vapor evaporates from these depressions and condenses into fine water droplets on the top of the woods to form fog. These fogs therefore become a sign of the breeding of mosquitoes and germs, and are considered to be 'miasma'. In addition, many large groups of mosquitoes can be seen from a distance.
Like clouds and mist, the ancients thought there was something wrong with the air in the south."
In the old days, when the land was full of smoke and rain, it was said that the color of a tiger had changed because of the miasma.
Looking purely from the perspective of geographical factors, Bi Fang understood for the first time what the so-called "miasma" was.
Mist often appears in the mountains and forests,
Before, he only knew that this was a misnomer for bacterial and parasitic diseases by the ancients, but he didn't know why such a misunderstanding occurred. He just assumed that people didn't understand and blamed it on strange forces and chaos.
At this moment, I saw the mist in the forest and remembered what I saw and heard in Mohe.
"You still have to read thousands of books and travel thousands of miles."
Bi Fang wiped the mixture of water mist and sweat that had condensed on his head, dug out the mixed clay, and shoveled it into the rattan dustpan frame.
"Three pits are not enough, we have to dig another one to build a stove."
"Temperature is the key to iron-making. The underground furnace can accumulate heat more effectively. And the deeper we dig the hole, the higher the furnace will be."
The length is integrated. The deeper the ground is, the greater the overall length of the furnace is in disguise.
The fire will be more powerful.
"Using the chimney effect, the higher the stove, the faster the airflow. The faster the flow rate, the lower the pressure. A pressure difference will be formed with the bottom, the fire will be stronger, and our combustion rate will also increase."
【666, it’s been ten days, finally some useful information! 】
[There are eleven days left, can Lao Fang make it in time? 】
[Brother, go back and apologize to your sister-in-law]
[Just waiting for the reactor, when will we build a nuclear furnace?]
[I didn’t understand a word of such a long paragraph, I was crying like a storm.]
"Ha, can't you understand?" Bifang scratched his eyebrows. The black mud on his hands made him look confused, but he didn't care at all.
"To put it simply, everyone knows the flow of hot and cold air. This is also a junior high school knowledge. Thermal expansion and contraction. Therefore, under general conditions, the same volume of cold air will be heavier and it will fall, while the hot air will be heavier.
It is light, so it will rise and form air convection."
The audience nodded, it was easy to understand.
"When the bottom of our furnace is burning, the air will heat up, expand, and then rise, and the cold air above will sink. The relative flow speed depends on the temperature difference. As long as the chimney is high enough, the air above us will be closer to the natural temperature.
In other words, it is colder, the greater the temperature difference, and the faster the flow speed. Can you understand this?"
The audience continued to nod.
"Once the air flows and the speed is fast enough, we will have enough oxygen to support combustion, improve combustion efficiency and temperature, and it is equivalent to a natural blower."
Utilizing the principle of hot air rising, hot smoke is discharged from the upper air outlet, and fresh cold air from outside is drawn in from the inlet, which increases the oxygen required for fuel combustion, makes the fuel burn more fully, and enhances the intensity of the fire.
This is the principle of blast furnace.
Blast furnace smelting of iron sounds powerful, but it actually means iron produced in a blast furnace.
One of the main reasons for limiting materials throughout the ages has been combustion temperatures and furnaces that can withstand high temperatures.
The audience suddenly realized.
【Fuck, I got it!】
[Holy crap, is this so scientific? I always thought Boss Fang came from the world of metaphysics, dog head]
[You think I am science, but actually I am metaphysics!]
【There are always people wearing the guise of science to show us magic.】
"The same goes for high-rise buildings. The hot air caused by low-rise fires will flow upward through the channels, allowing the hot gas to accumulate at the top. As a result, the fire will convection through the air, creating another fire scene on the top floor of the building."
"So don't run up when escaping from a fire. You must go down."
Bi Fang dug a hole that could accommodate half of his body and began to build a stove out of clay.
[Is it really reliable to make iron with iron bacteria? It feels like Magneto sucking out iron from the human body]
[I also think it’s a bit mysterious, but if I say no, I bet 50 cents that Boss Fang will slap me in the face. Funny]
"There is no problem, whether it is theoretical or practical, it can be successful."
Bi Fang piled a large piece of clay on the ground, spread it in the pit, and glued a layer around it.
"Iron bacteria can oxidize divalent iron into ferric iron and obtain energy from it. In water, they can oxidize ferrous iron compounds and precipitate them to form trivalent iron hydroxide."
"Sediments gather around bacteria and produce a large amount of brown slime, which leads to pitting corrosion and the formation of rust tumors on equipment and pipes. Many times, this is the brown rust we see in pipes."
"Because of this, it can oxidize ferrous hydroxide dissolved in water, and ferrous carbonate is deposited into ferric hydroxide, which plays a role in concentrating and accumulating iron elements in the environment. Many scientists also believe that it may be natural brown iron.
Participants in the formation of mineral deposits.”
"The final iron hydroxide can be used to make iron!"