Traveling through ancient times: Savages are hungry for food

There were plenty of dry branches in late autumn, and the firewood everyone collected all morning was piled up in the square.

The pile of firewood was almost as big as a football field.

Most of the wood was dry branches, with fewer large pieces of wood. The stumps carried back by the males also needed to be split.

It is not cost-effective to burn thin branches to make charcoal, so wait a day or two and collect larger pieces of firewood to burn together.

In the next two days, Sang Tian has to quickly build the furnace wall for burning charcoal.

……

Noon break.

Sang Tian found Lei, Wu, the two captains of the gathering team and the three captains of the hunting team.

Discussing charcoal making.

"Sang, are you saying that if you process wood in this way, the charcoal you make won't produce smoke?"

Sang Tian explained calmly, "Yes! Charcoal is smokeless, which is a huge advantage for indoor heating! It provides a cleaner heating environment."

He nodded vigorously and said, "No smoke! That's feasible! Heating during the snow season is the most annoying thing. You can't help but feel choked, but you can't not burn wood! After every snow season, the cave is smoked black and yellow!"

Sang Tian had learned in advance that the tribe would keep warm during the snowy season.

But I won’t hang a door curtain made of thorny armor skin!

First, the smoke was so thick that if the curtains were lowered, people would not be able to stay in the cave.

Second, the most important point.

Deep in their hearts, they knew that fires should not be kept closed during the snowy season! Otherwise, people would die!

The tribesmen don’t know the reason, but this is the conclusion reached by countless generations through life practice.

This inheritance is imprinted in their blood, and they must always keep it in mind!

Sang Tian continued to explain: "No smoke is only one of its benefits. Charcoal also burns at a higher temperature than ordinary wood. It releases more heat when burning than wood.

Besides, charcoal burns longer than regular wood!"

Sang Tian didn't know how to explain why charcoal had these benefits.

However, they won’t understand even if I tell them, so I’ll just not say anything.

Charcoal is made by pyrolyzing wood at high temperatures, releasing more heat when burned and achieving high combustion efficiency. Furthermore, the high-temperature calcination removes the moisture and volatile substances in the charcoal, leaving only the carbon element.

Therefore, charcoal burns more efficiently and burns longer.

Moreover, charcoal is low in quality and high in density. It is not easily affected by moisture and is easy to store.

Lei asked, "Sang! Can this charcoal really be hotter than wood?

If that were true! This snow season would be much better! "

Shan also said to Lei: "Not only is the temperature high, but if the burning time is longer, our tribe can save a lot of wood!

A log as thick as my forearm only lasts a few minutes! Our tribe burns more wood every day than we collected this morning!

Sang Tian affirmed: "A piece of wood as thick as a mountain's forearm can burn for a few minutes, but a piece of wood of the same size can burn for at least an hour!"

Lan was so shocked when she heard this: "What...what? One hour!

Oh my god! This is truly incredible! "

Sang Tian didn't wait for anyone's reaction and immediately finished speaking.

"Charcoal, like burning wood, needs ventilation. Otherwise, people will die from poisoning if they smell it for a long time.

When everyone in the tribe makes a fire during the snowy season, they will open the curtains and let the biting cold wind blow in. It is not much different from not making a fire!

But I will make a container, and put a bamboo pole specially used for gas ventilation on the container, and then make a hole above the cave to pass through it.

Put the charcoal in and burn it, and the burning gas will flow out through the pipe of the container.

A hole as thick as an adult man's thigh was built above the cave for ventilation, which served as a double layer of insurance.

This way everyone won't get gas poisoning.

Even when sleeping at night, you can put some charcoal in the container and nothing will happen! "

……

After Sang Tian finished speaking, everyone present had serious expressions, as if they were considering something.

Han asked first: "You mean, use this container you made.

The animal skin curtain is down, and the poisonous substance will float out of the cave along with what you made?"

He is indeed a smart man.

Comprehension is also very fast.

"Yes! Burning wood and wood can kill people because they release a poisonous gas. So you have to lift the curtain to ventilate the cave, and people will be safe.

But if we dig a hole in the cave, put a bamboo pole through the hole, and let the gas float out along the bamboo pole, everyone will be fine!"

Mengmiao said with great joy, "Put down the animal skin curtain and light the charcoal! I can't believe how warm it will be in the cave!"

Wu stared at Sang Tian with cloudy eyes and said in an old voice, "Can you guarantee that nothing will happen?"

"I can't! Nothing is 100% guaranteed!"

“I can’t guarantee that the containers I made are completely free of gaps, whether it’s the inner wall for burning charcoal or the pipes for poison gas.

Therefore, each cave must have a hole as thick as an adult male's thigh for ventilation.

Even if there is a gap in the container, such a small amount of poisonous gas will have nowhere to hide under such a large ventilation hole!

After all, using a hole as thick as a leg for ventilation is much warmer than using this cave entrance for ventilation!"

In modern winter, almost every household has a stove.

Sang Tian was very familiar with its structure and its style was very simple.

But Sang Tian wasn't a professional, so how could she guarantee that the furnace she made was solid?

Besides, even if there is no problem, people still have to be prepared for danger.

Who can guarantee that there will be no problems at all? What if the stove cover is forgotten?

After all, this one careless move could cost the lives of an entire family! How could Sang Tian not make second-hand preparations?

Be responsible to others and to yourself!

So Sang Tian wanted to leave a hole as thick as a leg for each family as a second line of insurance!

……

Lei was the first to slam the table and said, "Okay, Sang! I believe you.

Without you, there would be no Tianlang today!

We all saw everything you did!"

Wu stood up with his back hunched and said to Sang Tian, "Child, just go for it!"

……

Sang Tian felt touched...

Here...she is always trusted...

My efforts have always been recognized...

How can I not be moved?

……

"I'm requesting 10 males and 10 females to help me complete this task!"

"Okay, let's go this afternoon!"

……