Chapter 489 Practice is the key to the door of truth
It’s late at night on the ninth day of survival in the Xishuangbanna rainforest.
Inside the shelter, soft snoring sounds were heard.
On the slope not far away, a huge black shadow slowly emerged from the bushes and stared at the shelter. A few minutes later, a faint sound of turning the soil was heard.
The snoring stopped.
Bifang opened his eyes, stared at the ceiling blankly, sat up and scratched his hair, picked up a piece of dry firewood that had been cut into a fish-scale stick, dipped it in some oil, lit it, and went outside the wall.
Under the light of the fire, the sound of turning the soil suddenly stopped.
After staring at each other in confusion for a few minutes, Bifang stumbled over and closed the bamboo door and threw the torch into the bonfire.
Continue sleeping.
…
Early morning of the tenth day.
The sunlight shines in from the door.
Bifang yawned, chewed some lemongrass mixed with charcoal, bit a tree stick for a while to brush his teeth, and washed his face with clean water before he finished washing.
After taking care of personal hygiene and filling the surface with charcoal ash and soil, Bifang started the live broadcast.
"Morning, brothers."
【Good morning, Mr. Fang! 】
[Why don’t I have any sisters? Woohoo!]
[I am so angry, when will we women be able to stand up?]
[Did the water monitor attack at night? 】
[It seems that Lao Fang is sleeping well? Is the water monitor gone? ]
"It didn't leave." Bifang called the drone to follow him and come to the position opposite to the door.
There was originally a small earthen slope covered with shrubs, with a small stream and a large river in front and earthen slope and shrubs in the back. The shelter can be said to be located near mountains and rivers.
But now, the small slope has become completely different. A dark cave has appeared under the slope. The excavated soil has piled up in a circle in front of the cave, like a trench.
“It’s in there now .”
This is……
Zhou Weisheng straightened up and looked at the scene in some surprise.
Due to the appearance of the water monitor lizard, Zhou Weisheng got up early in the morning to watch the live broadcast, just to get a deeper understanding of the condition of the water monitor lizards in his own reserve.
Normally, when a team conducts research and tracking, they always carry large and small bags, with at least seven or eight people in a large team. They set up camp and have various instruments, which scare animals away when they see them. It is very rare to sneak in secretly like this, so this opportunity is rare.
Now it seems that they have settled down here?
Monitor lizards like to lay their eggs in tree holes and caves, which is indeed a familiar style.
Bifang said speechlessly: "I was woken up once last night. I went out with a torch and saw that it had dug a hole here. This morning, I saw that the hole was already dug and the whole family was inside. I don't know when it ate the fish in my pond."
Bifang walked around a few steps and came to the wall.
He had already cleared away the bushes in front of the shelter, leaving a clearing. There were three large pits on the ground, each half a person deep, and each had a different function.
One puddle houses fish, one houses iron bacteria, and the last one houses clay.
Once a fish is 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 pond. Bifang ate two of them yesterday, so there should be four left.
As a result, when they looked this morning, there were only two left. Who had eaten the remaining two? Bifang had no doubt that the culprit was the water monitor lizard not far away.
It seemed as if he sensed some kind of resentment.
The water monitor lizard crawled out of the cave, stared at Bifang motionlessly, and spit out a long letter.
"Fuck you."
Bifang swore for once and kicked a small piece of earth away, which hit the slope and splashed a little dust.
[Deep resentment]
[Oh my god, our hero and heroine are living together now? ]
[Water Monitor Lizard: Great, the canteen is closer to my home, and I can make fresh fish every day! ]
[Yes, I did it. What can you do? Come and hit me (his claws slapped the national first-class protected animal certificate)]
【Live in Bengbu】
[Is the first grade in the country so arrogant? When will I get one? I am also a first-level loser who just eats and waits for death, woo woo woo]
Bifang shook his head and said, "Forget it, let it be. There is a big project waiting for me to do today."
Perhaps because the sun was too bright today, there was even fog in the Xishuangbanna rainforest in the early morning.
Looking at the mist in the forest, Bifang suddenly remembered the miasma he had mentioned before, and a flash of lightning flashed through his mind.
"I finally understand why many people think that miasma is a poisonous fog, and why the ancients attributed the cause of illness to a word like 'miasma' which obviously has the connotation of gas!"
【Why? 】
Many people scratched their heads and asked questions.
"As the saying goes, running water never rots. On the one hand, running water draws oxygen into the water, and on the other hand, it stirs up the water with low oxygen content below to absorb oxygen. Therefore, organic matter decomposes quickly and it is not easy for microorganisms to accumulate."
"Moreover, flowing water will wash away insect 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 disease ."
"When the ancients talked about miasma, they were generally not referring to the agricultural areas in the open valleys, but to the surrounding mountainous areas. This shows that miasma cannot be simply described as hot and humid air."
Bifang added some water to the clay pit and continued to stir it.
A night of evaporation had caused the clay pit to become somewhat stagnant.
"Standing water is the most likely to breed bacteria, which requires the presence of many depressions that are lower than the surrounding area to store rainwater, and such depressions are common in most places."
"Even if the ground is sloping, fallen trees and collapsed rocks often create small depressions. Last year, when I went to Daxing'anling, I saw many similar depressions and puddles, or small swamps, in the forest. Of course, they were all frozen."
What Bifang was talking about was the time he went to Mohe. It was freezing cold and the ground was covered with frozen "ice puddles". Combining what he saw and heard this time, he finally understood why "miasma" was "miasma" and not "miasma water" or "miasma soil".
"It's just that there is less rainfall in the north, so the depressions dry up on sunny days and freeze in winter, while in the south, there is more rainfall and higher temperatures, so the depressions become 'bacteria soup' rich in organic matter and 'nursery rooms' for mosquitoes."
"These have become a serious threat to mammals like humans, which no longer have body hair. They are especially terrible for northerners who are not adapted to the southern flora, and the damage they cause goes far beyond acclimatization."
"Normally, these depressions evaporate water vapor, which condenses into tiny water droplets on the top of the trees, forming fog. These fogs are therefore a sign of the breeding of mosquitoes and germs and are considered to be 'miasma'. In addition, many large groups of mosquitoes look like clouds from a distance, so the ancients believed that there was something wrong with the air in the south."
In the old days, it was a land of smoke, rain and miasma, and people were terrified at the mention of tigers because of the miasma.
From a purely geographical perspective, Bifang understood for the first time what the so-called "miasma" was.
Fog often appears between mountains and forests.
Before, he only knew that this was a misname given to bacteria and parasitic diseases by the ancients, but he didn't know why such a misunderstanding occurred. He just thought that people didn't understand and blamed it on supernatural powers.
At this moment, when I saw the fog in the forest and remembered what I saw and heard in Mohe, I suddenly realized.
“You still have to read thousands of books and travel thousands of miles.”
Bifang wiped the mixture of condensed mist and sweat on his head, scooped out the mixed clay, and shoveled it into a winnowing basket woven from rattan.
"Three pits are not enough. We need to dig another one to build a furnace."
"Temperature is the key to iron smelting. The furnace underground can accumulate heat more effectively. The deeper the hole we dig, the higher the furnace will be."
The length is integrated. The deeper it is underground, the longer the overall length of the furnace will be.
The fire will burn brighter.
"Using the chimney effect, the higher the furnace is, the faster the airflow is. The faster the airflow is, the lower the pressure is. This creates a pressure difference with the bottom, which makes the fire stronger. This will also increase our combustion rate."
[666, it’s been ten days, finally some useful information is coming! ]
[There are eleven days left, will Lao Fang make it in time? ]
[Brother, go back and apologize to your sister-in-law]
[Waiting for the reactor, when will we build a nuclear furnace? 】
[Nuclear reactor? It’s almost there, don’t rush it]
[I didn’t understand a single word of this long paragraph, and I cried like a storm.]
"Ha, don't you understand?" Bifang scratched his eyebrows. The black mud on his hands made his face dirty, but he didn't care at all.
"To put it simply, everyone knows the flow of hot and cold air. This is also junior high school knowledge. Heat expands and cold contracts. Therefore, under normal conditions, the same volume of cold air will be heavier and will fall, while hot air will be lighter and will rise, forming air convection."
The audience nodded, this was still easy to understand.
"Our stove is burning underneath, so the air will heat up and 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 and colder. The greater the temperature difference, the faster the flow speed. Do you understand?"
The audience continued to nod.
"Once the air forms a flow and the speed is fast enough, we have enough oxygen to support combustion, increase combustion efficiency and temperature, which 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, increasing the oxygen required for fuel combustion, making the fuel burn more fully and intensifying the fire.
This is the principle of a blast furnace.
Blast furnace ironmaking sounds impressive, and it actually means just what it says: iron made in a blast furnace.
One of the main reasons for limiting materials throughout history is combustion temperature and high-temperature resistant furnaces.
The audience suddenly understood.
[Fuck, I get it! ]
[Fuck, is this so scientific? I always thought Boss Fang came from the world of metaphysics, dog head]
[You think I am a scientist, but actually I am a metaphysician! ]
【There are always people who show us magic under the guise of science. 】
"The same is true for high-rise buildings. The hot air generated by the fire on the lower floors will flow upward through the channels, causing the hot gases to continue to accumulate at the top. As a result, the fire will spread through air convection and create another fire on the top floor of the building."
"So when escaping a fire, don't run up, always go down."
Bifang dug a hole that could accommodate half of his body and began to build a furnace with clay.
[Is it really reliable to use iron bacteria to smelt iron? 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 in theory or in practice, it can be successful."
Bifang piled a large piece of clay on the ground, spread it in the pit, and also covered the surrounding area with a layer of clay.
"Iron bacteria can oxidize ferrous iron into ferric iron and obtain energy from it. In water, it can oxidize ferrous compounds and produce trivalent ferric hydroxide precipitates."
"The sediment accumulates around the bacteria, producing a lot of brown slime, which causes pitting and rust formation in equipment and pipes. Many times, the brown rust we see in pipes is this stuff."
"For this reason, it can oxidize ferrous hydroxide and ferrous carbonate dissolved in water into ferric hydroxide and precipitate, thus concentrating and accumulating iron in the environment. Many scientists also believe that it may be a participant in the formation of natural limonite."
"The final iron hydroxide can be used to make iron!"
