The winter in Chang'an is also very cold, and it is not okay to live in a thatched house all the time, Sun Simiao's request must be rejected.

Of course, it's not a positive rejection, that would be too bad for the grandson, as long as you don't build a thatched roof and a cement house when you build it.

The biggest convenience of the "superior" is that he only needs to use his brain, no need to use his hands, and after the heating water boiling experiment, the result is that it can be used completely, that is, occasionally there will be a few connected places dripping. However, compared with its cold-dispelling effect, this little problem is not worth mentioning.

Li Tai and Yan Liben's classes are mostly self-study classes now, and these two guys don't worry about the craftsmen installing the heating, and they have to keep an eye on it from time to time.

The heating pipe built by the Datang blacksmith...... How so? It's not very standard, anyway, Leng Feng is very worried about the heating leaking suddenly during class, and then everyone can take a hot shower.

Therefore, the heating pipes and water tanks in the classrooms of the Academy of Arts are equipped with wooden box shells, although it is very troublesome to repair water leaks or something, but after all, it is safer, isn't it?

In the end, the manufacture of glass encountered trouble, Yan Liben tried many times, but failed to make transparent glass.

Although the firing thing is crystal clear, the light transmittance is particularly poor, and this kind of thing cannot be used as glass at all.

The biggest difference between fantasy and reality is here, in the later life, if you want something, you can just buy it, when you buy glass, how can someone ask: "What material is this glass made of?" ”

Even if you ask, most businessmen will laugh: "I'm just a glass seller, how do you know what kind of material glass is?" ”

The so-called "scientific research" is science and research, science and research are equally important, Leng Feng knows the source of glass manufacturing, and the rest is research.

Yan Liben liked the lump of green things he burned for the first time, and specially found a carving knife to carve it into a handicraft. Yan Li originally had a foundation of wood carving, and the stone carving was not bad, and the carved things looked pretty good.

That piece, or that lump of green glass, was carved into a hill by Yan Liben, and placed on Yan Liben's desk, and there were strange rocks and trees on it, lifelike, shining in the sun, very valuable.

At this time, the merchants of the Western Regions called it "glass", and as soon as it appeared, it would be coaxed by high-ranking officials and dignitaries.

"The broken things burned out of the sand, the world still thinks it is priceless, I don't know what to say."

Seeing that Yan Liben was staring at his works with a fascinated expression, and he had a tendency to become a glass engraver, Leng Feng hurriedly pulled him back from his fantasy, how good it is to be a scientific research worker, why bother to be a glass seller?

Yan Liben put the glass carving on the table, sighed and said: "The glass of the Western Regions, it turned out like this, the tattered ones are not as good as the things I made, Xi Guogong, I have done a lot of experiments like this, and found that the color of these glasses is different, do you have any way to lower its color?" As long as it is lowered to light transmission, it is enough. ”

Leng Feng raised his chin and thought about it, chemistry, he only learned a little rough at the request of his master, so it was enough not to be ignorant, so when it came to these technical things, that poor chemical knowledge was completely insufficient.

Green? It should be iron, but is it because of ferric and ferric oxide or ferric oxide that makes the glass green?

Anyway, the iron removal method should work! As for how to remove iron......... It's better to ask a professional!

"The sand and stone that burns the glass should be mixed with iron!" Leng Feng looked at Yan Liben and said, "If you have a way to remove the iron, maybe the glass will become more transparent." ”

"Iron?" Yan Liben asked, "How to remove iron?" ”

Leng Feng smiled bitterly: "I'm not a blacksmith, how do I know how to remove iron?" Perhaps you should ask the blacksmith you will be in prison. ”

There are many blacksmiths who will be the prisoners, and there is one of the Thunderbolts who happens to be not far from the Bun Academy.

Leng Feng happened to have nothing to do, and after arranging Li Dejian's enrollment, he took Yan Liben to the Thunder Division to find Tie Sheng.

Without Leng Feng with him, Yan Li would not have been able to enter the Thunder Division.

The defense of the Thunderbolt Division can be described as changing three times a day, a small piece of land, and almost every corner has at least one pair of eyes staring.

The outermost guards are all fully armed Xuanjia soldiers, and anyone who passes by the periphery of the Thunderbolt Division, even if they don't see it, must be interrogated before they can be released.

If it weren't for the surrounding dealers, they would be asked. If it was an unidentified person, these Xuanjia soldiers didn't even ask again, and directly drew their knives and slashed people. Therefore, the surrounding farmers would rather open a new path than dare to get close to the side of the Thunderbolt Division.

After passing through the outermost guards, the inner circle of the Thunderbolt Division was a soldier of the Xuanjia Army armed with a wooden spear.

Since he remembered that the impact of the blade would also cause sparks, Zhang Zhongqing immediately ordered the Xuanjia soldiers guarding the inner circle to change to wooden weapons.

Tiesheng's territory is between the inner and outer circles, and a total of more than 100 blacksmiths are working day in on the construction of thunderbolt shafts and thunder shells.

Thunderbolts and thunderbolts are two things that are very convenient to use, as long as they are ignited and shot out or thrown out. After the gunpowder ignites and makes a sound, a thunderbolt or a thunderbolt is gone.

And the thunder arrow shaft is a skilled iron sheng, and it only has more than 20 outputs to build it all the time in a day, and as for the thunder shell, it is even less.

In particular, Zhang Zhongqing's requirements have always been strict, and the thunder arrow shaft and thunder shell must be completely in line with the specifications, otherwise they must be reworked.

It was precisely because all links complied with these strict requirements that Zhang Zhongqing dared to set the dumb fire rate of the thunder arrow to 10%, and he patted his head to ensure it.

Tie Sheng is now the blacksmith leader of the Thunder Division, and he also has the official position of the six grades sealed by the imperial court, which can be described as infinitely beautiful.

Although he can no longer go in and out of the Thunder Division at will in this life, and even when he goes out, someone will follow him with a steel sword, but after all, he has changed from a blacksmith to an official. What's more, the Thunderbolt Division will not allow him to go out at will, but it will not prevent him from marrying and having children.

In this era, most of the marriages do not require love, and rich, famous, and officials can pick a wife at will, so it is not a big deal for Tie Sheng to be trapped here.

When Tie Sheng heard the call, he immediately put down the hammer in his hand and went out to see Leng Feng.

Although he didn't know who Leng Feng was, he must be a big man who could come and go in and out of the lightning division at will, although he was honest, but he was not stupid, so he ran out.

(End of chapter)