After a while, Ji Cheng and Jiang Hongdou breathed a sigh of relief.

"It's not raining..."

"Well, this is also common in my place in summer, when there is thunder but no rain.

There are many reasons, which are very complicated. It may be that the precipitation conditions are not met, or it may be the difference between the range of thunder and the range of thunderstorms.

It got off there, but we didn't get off here. "

Ji Cheng paused, turned his head and exchanged glances with Jiang Hongdou, and continued: "But no matter what, this phenomenon is an early warning and a warning."

"I know!" Jiang Hongdou nodded seriously, with a slightly serious expression, "Is there any other way we can speed up the construction of the house?"

"Actually, there is no good way. Don't go back to the camp. Put my pants, pants, and put them back..."

The corner of Ji Cheng's mouth twitched slightly, he took Jiang Hongdou's hand and said, "Stay here and help me, if you can help me a little."

"it is good."

......

......

The limestone crushing work kicked off quickly.

In order to fully react in the kiln, too large pieces of stone should not be left.

They don't have modern crushing equipment, and they don't have the manufacturing conditions for jaw, rotary, and impact crushers.

Only rely on human impact crushing.

As the name suggests, Jiang Hongdou was responsible for picking out the large stones and placing them on the ground, while Ji Cheng was responsible for swinging the stone axe.

Fortunately, the molar hardness of limestone is 3, which is not a hard rock.

So, not to mention that this primitive broken method can't complete the work, it's just that my arms are sore and my hands are numb after the shock.

After 3 days, they had broken limestone, at least not in too large chunks.

With the materials that can be fired, the next step is to make the tools for firing——

After the earth kiln (hot kang), the second generation kiln will be built with plain bricks and clay.

Jiang Hongdou weaved two new pole baskets and stayed in the camp to be responsible for filling the baskets with plain bricks.

Ji Cheng carried the poles and transported them in two baskets to the site where the kiln was to be built by the river.

Every time I transported it, when I came back, the camp had already installed bricks, waiting for him to unload and replace them.

This is almost non-stop, racing against time and the upcoming summer rainstorm, and the efficiency has reached the maximum that can be achieved.

After a few days, the two worked so hard that they didn't say a few words.

After work every day, I just want to eat, drink and sleep, and then get up and continue working.

On this day, Ji Cheng returned to the camp after transporting another shoulder pole, and finally said a short sentence:

"There is still one trip, two baskets, enough, don't pack."

"Ah."

Jiang Hongdou also responded briefly, expressing her understanding, then hurriedly pulled Ji Cheng away who was about to leave, and handed over a bowl of Liang Bai Kai that had been prepared in time.

Ji Cheng glanced at the bowl, then at the girl, paused for a moment, quickly put down the pole, pursed his dry lips, and took the bowl with both hands.

Tick ​​tock.

Ripples appeared in the bowl in front of him.

Just as Ji Cheng was about to drink it all down, he was startled seeing the ripples, and raised his head slightly.

Um?It's raining?

As soon as this thought crossed my mind, the rain had already become pouring.

In the heavy rain, thunder came rumbling and dull.

Good guy!

The rain will be small after the thunder, and the rain will be heavy after the rain.

The summer rain is finally here...

Ji Cheng came back to his senses, quickly drank the cold water mixed with rainwater, then put down the bowl, pulled the girl up and ran to the kang quickly.

When he got to the kang, he lifted the 'quilt' made of animal skins and hemp straw, and held it above his head to protect them from the rain.

Then rolled up the straw mat and pulled the girl to stand on the kang, avoiding the ground below which had soon turned into a gurgling stream.

"It's raining."

Jiang Hongdou looked at the rain curtain and sighed softly: "We still haven't caught up..."

"It's also expected, after all, it's been a while since summer."

The matter has already happened, Ji Cheng said optimistically: "Just take a break, the summer rain is heavy, but it doesn't last long, after this rain is over, we will work again."

"Is it in time?" Jiang Hongdou looked up at him and said, "Is it in time to build the house before it rains? Summer rains are also very frequent."

"If it's too late, let's get some more rain."

Ji Cheng shrugged: "Then what else can we do, we've done our best during this time."

"But, a few more rains, and you'll get sick, and I haven't had time to make your pants and shoes...

Ok?wait. "

While Jiang Hongdou was talking, she suddenly realized that Ji Cheng was holding up the 'quilt' to keep out the rain, and the animal skin was covering her, and the leaking part was on his own side.

Under the pouring rain, Ji Cheng's body was already completely wet by now.

She was stunned, and quickly reached out on tiptoe to pull the 'quilt' on top of her head, and changed the direction, changing the side where the rain leaked.

Then, seeing Ji Cheng's blinking eyes, Jiang Hongdou panicked for some reason, and subconsciously explained:

"I, I care about you because I like you, and treat you well..."

"Eh......"

Ji Cheng was taken aback when he heard the words, and while he was in a daze, the girl's hair was quickly wet by the rain, sticking strands to her cheeks.

This is good... everyone is now a drowned chicken.

Ji Cheng came back to his senses, looking helpless at this scene, but thinking about what she just said, his heart trembled again.

Usually quite smart, how could he look so stupid at this time.

He leaned over, pulled in the distance, narrowed the space, and let the not-so-big animal skin above his head block the two of them at the same time as much as possible:

"Is this always okay?"

"Well... okay."

"It's okay with your size! It's unreasonable for two people to be wet, as long as one of them gets wet..."

"That's all for you, you need it more, uh..."

Jiang Hongdou didn't say the second half of the sentence.

Because Ji Cheng suddenly put his head down and kissed him.

She was caught off guard, her eyes widened slightly, but after a while, her eyelashes trembled and she closed them gently.

It was raining heavily, and the two kissed unreasonably in the rain.

Jiang Hongdou didn't expect Ji Cheng to kiss her at this time, just like before.

But this time, she also seemed to understand why and what kind of emotion it was...

Chapter 35

After the rain, the air is not muggy for a short period of time, and it is much fresher than before the rain.

Occasionally, there will be a burst of forest wind, and it will be even a little bit cooler.

In the increasingly hot summer, the wind and the sweetness of the mouth make people feel good.

Ji Cheng finished picking the last plain brick with great vigor, and then, together with the girl, started the construction of the kiln in earnest.

The overall shape of the kiln is built according to the simple and practical core idea——

A cylindrical chimney + a cuboid firing chamber.

Just like a combination of a flat milk carton and a can of soda, it is really simple enough.

The entrance of the firing room is directly piled up with unbonded plain bricks, which can be moved in and out.

In this way, the air flow and the size of the flame can be controlled simply and conveniently.

Of course, this approach is indeed crude.

No way, for now, it is already the best way to deal with it.

If you use wood as a door, the high temperature during firing will burn the door even if the flame does not touch it.

"Really?"

While building a kiln with Ji Cheng, Jiang Hongdou was a little surprised when he said that: "The wood can burn even if the fire doesn't touch it?"

"What does the fire offer?"

Ji Cheng built a brick, tilted his head and said with a smile: "When I first drilled wood to make fire, I seemed to have mentioned the phenomenon of burning."

"Hmm, temperature?" Jiang Hongdou recalled, remembering the word Ji Cheng always mentioned, especially the heat generated by friction.

Ji Cheng nodded, and in order to make it easier for the girl to understand, he said step by step:

"We have just had rain here, and the temperature has not yet risen. It looks like 27 degrees. You can feel it, remember this feeling, and use it as a standard.

Then, we usually burn bonfires, and the temperature at which the wood can burn, that is, the ignition point, looks like 250 to 300 degrees.

And the kiln we are building right now is made of plain bricks. This material has insulation effect, will not burn, and has a very high melting point, that is, refractory bricks.

With its help, and using the charcoal we have been accumulating, the temperature of this second-generation kiln is expected to reach a high temperature of around 1200 degrees!

So, roughly feel it?Even if the flame in the inner firing chamber didn't touch the wooden door at all, the door would turn into flames by itself with a bear sound. "

"Understood......"

27 degrees vs. 1200 degrees, it's really, kind of scary...

Jiang Hongdou said in a daze: "Although I understand, I still feel amazing.

The appearance of the flames...is not the cause of the burning.

It's like exploring the nature of the world, not what I see with the naked eye. "

"Hey~ You're amazing!"

Hearing this, Ji Cheng praised: "That's right, science is exploring the nature of the world. I found that you are really super talented."

"Oh."

Jiang Hongdou was still immersed in this wonderful feeling, he responded casually, thought for a while and asked:

"Then about the temperature, how many degrees was it when we kissed?"

"?"

"No other meaning, I know we won't burn at that temperature, I'm just curious, because I think it was quite hot at that time..."

"..."

Sure enough, he is very talented, just accepting the concept of temperature made it difficult for the teacher.

Ji Cheng slightly embarrassed and shook his head: "I don't know..."

"You do not know!?"

Jiang Hongdou was surprised: "You also have something you don't know!"

"Of course, I'm not a god..."

Ji Cheng looked at her helplessly.

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