let go of that priestess

Well, the heated kang acts as an earthen kiln, and there is nothing wrong with it. It is much better than burning it outside with a bonfire, and it can also warm the kang.

After dinner, after waiting for a while, the Kang was warmed up, and another day passed without knowing it.

Ji Cheng sighed a little, then turned onto the bed, patted his side and said:

"Come on, go to bed, the finished product can't be taken out now, it's very hot inside, wait until tomorrow to see."

Chapter 21 Equivalent to 80 You

The next day, January 1rd of the first year of Civilization.

It was just dawn, and the hardworking husband and wife had already woken up.

Carefully take out the utensils fired yesterday from the kang, and take them to the river to wash.

Then I was pleasantly surprised to find that 2 bowls, 1 plate and 1 pot were all done successfully——

They have become stronger bisque and will not return to clay no matter how wet.

"Luck is really good~"

Ji Cheng put the washed dishes on the river bank, and even had the urge to cry:

"It's not easy...I can finally drink boiled water today!

Whether it is water or food, as long as it is boiled, it can kill 99% of bacteria and viruses. "

"Well, I understand." Jiang Hongdou, who already knew about microorganisms, also nodded seriously:

"Those little things are also living things, so they will definitely die in such a hot environment.

In other words, our safety has been further guaranteed! "

"That's right, that's right." Ji Cheng came back to his senses, and began to help the girl scrub and wash her body: "Be patient, we will be able to clean our bodies in a few days."

"Hey, how many days? Now that the pot is ready, will the soap still take a few more days to make?"

"Well, although the production conditions are all met, the raw materials are not enough."

Ji Cheng explained: "For example, plant ash, this thing actually needs to burn a lot of wood to get a little bit of plant ash.

Specifically, if you burn 1 kilogram of wood, you can get 1 gram of ash. You don't have the concept of a unit of weight, but you can imagine it just by looking at this ratio.

Burn 1000 trees to get the ash of 1 tree. "

"Huh? So little?..."

Jiang Hongdou was stunned and said, "No, I see that the ashes from the bonfire are not too small?"

"No." Ji Cheng shook his head: "Those burnt ashes need to be boiled dry with water, and the off-white residue at the bottom of the pot, that is, the pot ash, is the plant ash."

"Oh...so."

Jiang Hongdou understood that it really needs to be collected and accumulated.

She thought for a while, and then began to help Ji Cheng scrub his body, and said while rubbing:

"Soap is easy to make, but hard to obtain, so it is also a very precious thing."

"Well, soap made this way was actually a luxury item until someone came up with a cheaper way to make it and it became available to everyone."

Ji Cheng shrugged and said, "But that requires high technology, and we don't meet the conditions now."

"Actually, this is not bad." Jiang Hongdou blinked and said: "The low-tech production process is very simple, I have already remembered it.

And burning the pot to get the ashes is just a little more effort, not physical effort, you can leave it to me~"

"I think so too." Ji Cheng nodded: "You kept burning fires in the camp to accumulate plant ashes, and the fire you lit can continue to make bisque.

Next, you can challenge the bisque which is bigger and more difficult.

For example, we need an oil tank for storing oil, a tank for storing ashes, and a tank for storing food.

In short, make more containers that you can think of. We are in short supply. The current dishes and pans are just the most basic. "

"Understood." Jiang Hongdou: "I'll start doing it right away when I get back to the camp."

"Well, I'll turn the potter's wheel for you. After the prototype is finished, you can slowly burn it. I have to do something else."

"Huh? You mean, anything other than hunting?"

"Yes, there are 3 more things to do today."

Ji Cheng said: "1, use the remaining short rope and flint to make a stone knife, and polish it finely for finishing some utensils.

2. We are short of rope and clothes, so we need a lot of hemp. I am going to collect it. This is the only natural fiber we can collect at present.

By the way, is the thing you weave rope called hemp? "

"Yes." Jiang Hongdou nodded and said, "This kind of plant is everywhere in the forest, but it's okay for weaving rope. Do you really want to use it for weaving clothes?"

"Of course~" Ji Cheng smiled:

"Hemp has good moisture absorption and ventilation functions, fast heat transfer and heat conduction, cool and crisp, sweating not close to the body, light texture, strong strength, insect-proof and mildew-proof, less static electricity, fabrics are not easy to pollute, suitable for excretion and secretion of human skin And so on, why can’t you make clothes?”

"Uh, there are so many advantages..." Jiang Hongdou said in a daze, "but the rope is so thick, if weaving it into clothes..."

"It's true that a thick rope can't be used to make clothes at all. If you weave it forcibly, it's almost like a net. If you make it thinner, you should try it. It's easy to break and has no toughness, right?"

Ji Cheng understood the interface, paused and said: "But I can solve this, and this is the third thing I have to do.

I will use fine stone knives, chip wood, make a spinning wheel, and a loom. "

"Spinning wheel, loom?"

"Hmm, to put it simply, it is able to spin very thin and resilient hemp thread, and then we can use the rope at super fast speed, put on clothes and shoes, and get a bed that can really be cushioned and a quilt.

In terms of work efficiency, affected by the advanced level of the spinning machine and loom, it is about 10 to 100 times the efficiency of your hand weaving.

But I must be aiming at the best spinning wheel and loom that can be built, which is about 80 times more efficient. "

Ji Cheng pouted to signal the girl: "In other words, it's equivalent to 80 of you working at the same time."

"Wow......."

Jiang Hongdou was dumbfounded and opened his mouth slightly.

Just now, he seems to have casually said something very extraordinary...

80 me?

This is science and technology comparable to miracles!

.......

.......

After taking a shower, the two returned directly to the camp today without doing anything unnecessary.

After breakfast, Ji Cheng started to help the girl turn the potter's wheel, first let her knead the prototypes of several utensils, and light a fire to burn them.

Then Jiang Hongdou watched the fire, made bisque porcelain, and burned plant ash, while continuing to instruct Ji Cheng on the beating of stone tools.

A stone knife was born again amidst the tinkling.

Ji Cheng grunted and polished the knife until it was roughly smooth, and it took another morning.

Grinding stone tools is much more troublesome than breaking stone tools.

It was almost noon, and there was not enough food in the camp. He looked at the sky, took a freshly sharpened knife, and the ax he made yesterday into the forest to hunt.

Now that the ropes are all used up, they can only be replaced by vines whose leaves have been cut off on the road. The success rate of catching birds has dropped a lot.

But bear with it for a while, when the hemp rope can be mass-produced, then it will not be a trap to catch a bird, but a net to catch a group.

And the net can not only catch birds, but also catch fish!

......

......

It looks like after 2 o'clock in the afternoon, because the catching tools are not ideal, Ji Cheng has hunted enough birds until this point.

But also because of the stone ax and stone knife, he got some other food today——

He chiseled into the trunk with a stone axe, climbed up the tree, dug out the eggs, and found several fruits reserved by the birds in the nest.

Ji Cheng decisively ransacked his home, and returned to the camp contented.

When he came back, Jiang Hongdou looked worried, as if he had been waiting for him for a long time.

Seeing that Ji Cheng finally appeared in her field of vision, she quickly walked over with a bowl in her hand.

When he came closer and confirmed that he was not injured, and saw the eggs and fruits in his arms, Jiang Hongdou was startled:

"Eh? Is today going well or not?"

"Although the hunting tools are not very good, overall, it must be smooth."

Ji Cheng put the prey, eggs, and fruits on the ground, then took the bowl of cool white boiled by the girl and drank it all in one gulp:

"With each additional food, our nutrition becomes more complete and healthier.

Also, I'm here to cook today, and I'll show you my hands~! "

Chapter 22 Possible New Salt Sources

With the flame and the pot, human beings have unlocked cooking.

Camp, by the campfire.

Wash a few fruits and slice them with a stone knife, and put them on a plate for later use.

Break up a bird's egg in a bowl and stir it with chopsticks that have just been peeled and sterilized in boiling water.

Heat the pan and add some poultry oil.

When the oil is also hot, Ji Cheng pours the beaten egg liquid in, and with the other hand, he holds the chopsticks in the pot and slowly circles in one direction.

After a few seconds, the egg blossoms.

Then put the fruit slices, stir fry, stir out the juice, and finally put on a plate.

Another world version, tomato scrambled eggs are ready~

Although a tomato is not a tomato, and an egg is not an egg, it is almost the same.

"Okay, it smells good!"

Sitting next to Ji Cheng, Jiang Hongdou swallowed saliva frantically, a little unable to hold back.

"Can you eat?"

"Don't worry, wait until the dishes are ready."

Ji Cheng continued to toss, "There's also bird offal and egg drop soup, and roasted bird meat."

"You really know how to..."

Jiang Hongdou watched his hands flying, cutting, boiling or stirring, and sincerely admired him, and asked, "Is this also science?"

"Ha~ yes." Ji Cheng glanced at her and nodded affirmatively: "Cooking is science.

Different cooking methods give the same ingredients different tastes, which are due to physics, chemistry and so on.

Well, let you feel it a little bit, you don't need to understand.

For example, bird meat, if I mince the meat, knead it into a meatball and boil it in water, the heat will penetrate into the symmetrical spherical meatball.

The heat conduction process inside this sphere can be described by a differential equation:

?T(r, t)/?t=k/ρc ?/?r (r2 ?T(r, t)/?t)

where T(r,t) is the temperature at point r and time t, k is the thermal conductivity, ρ is the density, and c is the specific heat.

Since both steaming and boiling provide the meatballs with a temperature of 100°C.therefore:

T(r=R,?t)=100°C"

While talking, Ji Cheng drew an equation on the ground with the bottom of his chopsticks, and continued: