let go of that priestess

Ji Cheng originally wanted to use some volcanic minerals, but if it was too far away, even if he arrived, transportation would be a problem.

But this also shows that his old lair is really safe here.

After hanging up the communication, he continued to tinker with making quicksilver.

The cinnabar ore is thoroughly crushed, then baked, and the evaporated gas is collected by distillation in a porcelain vessel, and then condensed to obtain mercury.

The whole process is only at the level of elementary school experiments, it is extremely handy, and it will be completed quickly, but the operation needs to be more careful and protected.

Mercury is poisonous, although Honglian said that the power of the dragon can resist damage, and he can indeed resist heat and cold, but who knows if it can resist the poison of mercury.

There are too many things that these local races don't know.

Ji Cheng is skeptical about whether non-physical damage such as poison or genetic weapons can be effectively protected.

"grown ups."

Holding a porcelain bowl full of mercury and was looking at it, the member of the technical manufacturing group 2 behind suddenly shouted.

Hearing the sound, Ji Cheng turned his head, glanced at her hands, and was stunned:

"Huh?...You've already done it so soon!?"

"Ah, do you think this is all right?"

The team member was a little embarrassed and pointed to the side and whispered: "I broke a few, wasting your materials."

"Oh, it's all right, glass can be recycled indefinitely, just put the broken glass into the kiln."

Ji Cheng didn't care about this, he explained something casually, walked over and carefully looked at the half-finished thermometer, his expression was happy, and he looked up at the sky again.

The weather is clear and the air pressure is stable.

The temperature is still cold, and there are still some ice ridges hanging on the eaves that are about to melt.

Well, today is indeed a good day to be a thermometer.

He retracted his gaze, looked at the team members and nodded:

"You did a great job! We can move on to the second half of the work, listen.

In the first step, I will pour mercury, this silvery thing in the bowl, into it.

In the second step, I will put this glass tube in a basin of ice-water mixture, then because of the principle of thermal expansion and contraction...

Well, anyway, the mercury level inside will change.

And you have to use the tip of the heated knife to gently and carefully mark the scale on the outer surface of the glass at the mercury height, and then I will heat the water to boil, and then you mark the scale again.

In the third step, I will heat the glass on the top, and you will use iron tweezers to clamp out an upper glass bubble and seal the entire glass tube.

In the fourth step, according to the two high and one low scales engraved earlier, you divide them evenly between them, and carve out the remaining scales.

For the method of equal division, I will use a line of the same length to fold for you to compare. "

With so many detailed steps, Ji Cheng also felt that it was too difficult, so he paused before saying:

"How is it? Did you understand everything? Are you sure?"

"Well, I understand my lord, I am willing to give it a try."

The team member said: Didn't you say that glass can be reused? I'm not sure that it will be successful once, but I'm sure it will be successful today. "

"That's good!" Ji Cheng cheered up, "Shall we start?"

"Ah."

The team members responded and held the tools to indicate that they were ready.

Ji Cheng nodded, poured mercury into the glass tube, broke a handful of ice and threw it into the basin, added river water, and then stood the glass tube upright in the basin.

When the team members saw that the adults were ready, they immediately came up, without blinking their eyes, heated the tip of the knife, and started to carve lines.

......

Twenty minutes later, Ji Cheng, who had been holding his breath, breathed a sigh of relief, and the team members on the opposite side also wiped off their sweat.

"My lord, it seems to be done?"

"It became..."

Ji Cheng picked up the finished thermometer and looked at it, then at the team members.

This person is worthy of being recommended by the technical manufacturing group 2. He saw it with his own eyes just now, and his hands are unsteady.

"What's your name?"

Ji Cheng couldn't help but asked, "In the future, I will call you over more often for glass manufacturing."

"My lord, my name is Lu Jing. I'm a small surname in the clan, so it's not worth remembering by your lord."

The group member shyly said: "I just do my work more carefully than others, and because I always do it too carefully and too slowly, in the group..."

"Oh, don't worry about this, it's just that the current division of labor in the village is not detailed enough, and your talent has not been fully utilized."

Ji Cheng was stunned for a moment, seeing that the girl was a bit inferior, he patted her on the shoulder and said:

"People should not easily deny themselves. When they find that some aspects of themselves are special, they can think more about whether it is their own advantages rather than shortcomings.

I know that this sentence was definitely not applicable in the past, but it is applicable now. The village develops, and I need all kinds of talents.

I don’t care about the other surnames, small surnames, etc. Your surname is Lu, so you should know Lugong. He is not the same as the leader of the construction team. "

"Oh." Lu Jing was a little dazed, she knew that the lord was kind, but she didn't expect that the lord would even comfort her, maybe...not consolation?

Your lord just seemed to be saying that in the future, regarding the manufacture of glass, you will often call yourself over?

Lu Jing's eyes brightened slightly, but she still said in a weak voice: "Then, my lord, what else do you need me to do for you?"

"Ah... this one."

After the thermometer and the incubator are settled, there is no special need for glass products at present.

Glass will shine brightly in the future, but Ji Cheng will not be so stupid as to attack this shy girl now.

After thinking for a while, he said seriously: "Then come over tomorrow and make a barometer."

"Barometer?"

"Yes, this thing has the function of weather forecast, and the meaning of weather forecast is——

When you hold it, you can predict cloudy weather, thunderstorm, wind and snow. "

"Prediction!?"

Lu Jing was taken aback when she heard the words, her thin voice was slightly raised, her eyes were slightly widened, and she paused for a moment with excitement: "This is amazing!"

"Ang, of course~"

Chapter 194 Return of the Prospecting Team

"How does this work?"

The office on the east side of the City Hall.

On the desk, a drop-shaped glass container with a nozzle and water is placed.

Jiang Hongdou looked left and right and groped, but she couldn't figure out how to achieve the magical ability of "precognition" that Ji Cheng said.

The thermometer on one side is easy to understand how to use, just plug it into the place that needs to be measured, and you can understand it by looking at the numbers.

"What is the air pressure on the barometer?"

"Well, about air pressure, you have to understand that air has weight too.

The air acting on an area is sometimes more and sometimes less, and the weight is heavy or light. The size of this force is the air pressure. "

Ji Cheng pointed to the barometer and said, "Look at the nozzle tube of this glass container, it is open, it is in contact with the outside air, there is also air inside the main body of the glass container, and there is a gap of water between the two.

Then, when the external air pressure rises, the internal air pressure will be relatively low, and the water surface will rise visible to the naked eye, maintaining the balance of internal and external pressure.

If the external air pressure decreases, the internal air pressure will be relatively high, and the water surface will drop visible to the naked eye, which also maintains the balance of internal and external pressure. "

"Oh." Jiang Hongdou believed in her husband, first accepted the saying that air has weight, and then understood that when separated by water, the internal and external air pressures are different.

So, looking at it this way...

After thinking for a while, she said, "Just now you said that the air pressure is sometimes high and sometimes low, and that it can be predicted, which means that the weather is related to the air pressure?"

"Yes, it's related."

Ji Cheng nodded happily: "If you find that the external air pressure drops rapidly, it is likely that a strong wind or a storm is coming. If the external air pressure rises rapidly, it means that bad weather is about to leave."

"So that's it, this function is really good!

Let's hand it over to the Ministry of Civil Affairs, which matches the functions of the Ministry of Civil Affairs. "

Jiang Hongdou's eyes lit up and said: "If you find that the air pressure has dropped, immediately notify all groups to pay attention in advance.

In this way, food that needs to be dried, feed for livestock, things that are being produced by various factories, etc., can be protected from wind and rain in the future!

Um, by the way, who did you say made it? "

"Lu Jing, a member of the technical manufacturing team 2, works very delicately and is good at blowing glass."

Ji Cheng said: "I told the technical manufacturing group 2 that Lu Jing doesn't go to the group every day, but is at the new kiln, and has been doing glass-related crafts."

"I've been doing it for a while, so what else?"

Both the thermometer and the barometer are so easy to use, Jiang Hongdou couldn't help asking curiously.

Ji Cheng hadn't done much in the past half a month except to go out occasionally to find new crops suitable for transplanting. The prospecting team hadn't come back yet, so he did bring another glass product when he came here today.

"Dang Dang Dang Dang!"

He took out an object of two wooden sticks connected side by side from his sleeve, handed it to Jiang Hongdou, and said with a smile:

"Of course there is, there is glass, but there are a bunch of technology that is so cool that it will explode.

Like this one, which is the latest achievement of this period - binoculars. "

"Binoculars?"

"Well, put your eyes on the eyepiece, that's right here, and then go to our house."

"Wow!"

Jiang Hongdou picked up the binoculars and opened his mouth wide: "This, how did you do it!?"

"Simple, install a convex lens on one side and a concave lens on the other side, and use the bending of light to magnify the distant scene to your eyes.

As for the specific principles, you will have to work later, next time I will teach the priestesses a class, and I will talk about it together. "

Ji Cheng said: "As for the binoculars, I will hand them over to Ying Fan, Minister of the Military Department, for investigating the situation.

Even in the current hunting, if the commander can understand the situation, he can make a good command. "

"Indeed." Jiang Hongdou took a telescope and looked around curiously, agreeing with the investigation.

After a short pause, she turned the binoculars upside down again, put her eyes together again, then continued to look around for a while, then put down the binoculars, and winked at Ji Cheng.

Seeing her movements, the latter couldn't help laughing and said, "My Hongdou is really smart~"

"Hehehe, I just thought that if you look at it from the front, you can zoom in, and if you look at it from the other side, you can zoom out, and it really does.

It's just... can't see those little things you described before, bacteria, microbes, etc. Why? "

"Because the precision is not enough, the magnification is not enough, and it is different from a telescope. If you want to see small things, you should use all convex lenses. Convex lenses stacked together are called microscopes."

"Then hurry up and make a microscope, the microscope is also very useful!"

Jiang Hongdou blinked and said, "Aren't we still cultivating super penicillin?"

"Well, I know, but to make a microscope that can see bacteria, the conditions are not enough.

In fact, it's not dissatisfaction. If I use Mosu to study it, it should be able to make up for the technical gap to make an electron microscope, but I don't want to use Mosu now. "

Ji Cheng spread his hands and said, "Our magic element reserves are really too small, and now there are only a few small magic element balls left. I want to wait for news from the prospecting team before making any plans."

"Oh, if the prospecting team finds a vein this time, maybe there is magic essence."

Jiang Hongdou nodded in understanding, then said after some calculations: "It stands to reason that I will be back, it's been almost a month.

Although I brought more than one month's worth of supplies with me when I set off, unless there is an accident, I won't be so tight on the schedule, and I should come back a few days earlier. "