Tang Jian, because of Yang Heng's arrival, changed from a tragic character to a semi-tragic character, that is, his official position has not been promoted, until this time, when Li Er made up his mind to set up the sixth prison, he was promoted.

If you want to say that his first tragedy, it should be great sorrow and joy, because he was arrested by Jieli, this is great sorrow, but after he came back, he went to the Ministry of Shangshu, and because of his interaction with Li Er, one of his sons took Yuzhang as his wife.

But after Yang Heng arrived, it was different, first of all, he did not send an envoy to the Turks to be detained by Jieli, so naturally he would not be promoted, he would not be promoted, and this interaction would be impossible to talk about, and even Yu Zhang became Yang Heng's scheduled wife.

And this time, because of the telegram, at the suggestion of Yang Heng, Li Er decided to set up a new prison, at first he remembered the name of the intelligence supervisor, but Yang Heng thought that this was too direct, otherwise it would be better to call the information supervisor, and because Tang Jian was a cooperative business with Yang Heng, Li Er gave Tang Jian the position of director of the information supervisor, because of its particularity, he was directly responsible for the emperor, so it was the official position of Zheng Sanpin, at first, Li Er was ready to let the chief official be called a eunuch, but under Yang Heng's strong opposition, It was changed to director.

The information supervisor is set up like this, the information supervisor is the general manager, and there are four departments, that is, four bureaus, the first bureau is the internal intelligence bureau, the second bureau is the foreign intelligence bureau, the third is the secret intelligence bureau, and the fourth is the telegraph and telecommunications bureau.

Now the first and second games are still vacant, and the third game is to bring in the spies behind Li Er, and naturally the person behind Li Er is the director. It's a mysterious position. It won't even be announced to the public. And the only thing announced to the public in this new prison is the director Tang Jian, one of the young eunuchs Yang Heng, naturally there are some subordinate assistants, and even in this prison, only Tang Jian is in the court, that is, he goes to work, Yang Heng doesn't go most of the time, but there is a desk inside.

And Yang Li also followed the position of a supervisor from the sixth grade, which was not recommended by Yang Heng. It's just that Li Er heard that Yang Li is Yang Heng's cousin, and Yang Li is mainly responsible for the matter of this cable telegraph, so he directly gave such a position.

And in the court, but I didn't hear any objections, why, this is a new functional department, it has nothing to do with anyone, and they are happy not to compete with Li Er, so they all passed the establishment of the information superintendent, and even they are waiting to see the jokes.

"Learn Wenxian's nephew. You see that I am your direct leader, shouldn't this telegram also be? "This old thing. I saw that the telegram was a good thing, "Cheng, I'll set up one in your house." "That's good, that's good, good nephew, this is what you set up for someone, not for someone." Could this be the legendary bishop that wants to be a bitch and build an archway?

"Well, well, well, even if it's me honoring you." Yang Heng regretted this, if this was directly according to Li Er's meaning, then Tang Jian would not be a eunuch.

"However, Director Tang, there is one thing to make clear, you need to arrange someone to copy this codebook, and the telegraph operator also needs you to find someone to study, which I don't provide here."

"Cheng, Cheng, this is all easy to say, I will do it immediately, but you have to set up the telegram as soon as possible." So another line was erected.

And this layout is like this, the main station, is located in the palace, Li Er specially to draw a place close to the palace wall, and there is a river, here by Yang Heng designed and built a two-story or three-story small building, this small building is for receiving telegrams, now the rooms are empty, Li Er believes, these rooms will slowly be full, and the information supervisor is to build another office on the edge of this small building, usually Tang Jian works here, even Yang Heng occasionally comes to work, but what about the telegraph inside, They are all let the palace maids take the role, Li Erzhen has a sense of moving forward, in Yang Heng's previous life, most of the operators are not all girls. So, this palace maid has another place to settle.

And now there are three routes, one is from Yang Heng's house to the main room, one is from Tang Jian's house to the main room, and one is from Li Er's residence to the main room.

And what is Yang Heng busy with at this time, because all the things about the telegraph have been handed over to Yang Li, and all Yang Heng basically doesn't care, but he is not idle, he is competing with the voltmeter.

Some people may think that the voltmeter, at this time can make a voltmeter, it's too, in fact, the voltmeter is really simple, Yang Heng needs to solve the hairspring thing, this hairspring is the most important part of the voltmeter, if the hairspring is easy to deform, the natural voltmeter is not accurate, and the others are simple, shellac has, this is a kind of glue from Tubo, and it is also a by-product developed by the Taoist chiefs, so let's say, scientific research is a thing, the investment is big, But sometimes it comes out not only one product, maybe several, and if you buy a technique, it is one, and once this technique is purchased and used, this has dependence, but it is not necessarily a special understanding of this technique. Naturally, there are times when there is only investment and no return, this, isn't it allowed, no one is smooth sailing, is it?

Although Yang Heng was worried about the hairspring, but this matter was solved by the coppersmith, after the copper was mixed with certain other ingredients, this small-scale rotating hairspring basically will not be deformed, and there is the problem of the moving coil shaft, first of all, the shaft is very simple, as long as a small hole is drilled in some gemstones, and the jewelers have this technique, even the gems will not be wasted, only the leftovers will become, this even the money does not need to be wasted, the moving coil, with a fine copper wire, the moving coil will be far away, and then the magnet, As long as the natural magnet is used, the same piece of natural magnet ore can make a lot of magnets, so a voltmeter is made, the pointer, that is simpler, in the previous life, generally used aluminum to make the pointer, and at this time naturally has not yet made aluminum, most of the other materials are heavy.

That, what's the trouble, it's done directly with bamboo, Yang Heng has a row of brains, and this doesn't need to be used to conduct electricity, so he uses bamboo to do it and even the counterweight is easy to do, that is, leave more bamboo at the end of the pointer, and then grind it slowly until the counterweight on both sides is the same.

On the surface, a blank piece of paper is painted with a scale. The most troublesome thing in this is the fixed voltage, this can't be set casually, so set casually, who knows what the safe voltage of the road should be, so, Yang Heng remembered the practice of introducing the ore radio in his previous life, which found some ore, which itself also needs to be used for rectification before it can be displayed on the surface, so this is also a necessary step, after many tests, it was determined which is silicon ore, which is germanium ore, naturally the pressure drop of these two ores is different, so, The voltage was also determined, which was basically the same as the voltage in Yang Heng's previous life.

After measurement, it was found that the electricity sent out was about 130 volts, which is not up or down, it seems that it is better to set the voltage to be the same as in the previous life, and 220 volts is the standard voltage.

Naturally, at this moment, Yang Heng introduced a new letter, that is, the letter V.

"Big brother, why is this voltage, voltage is right, voltage should be represented by this symbol?" "Well, you see this watch hand swinging around, isn't it exactly the same as this symbol, that's why I set such a symbol." Will I tell you that there will be a lot in the later life, and after a few hundred years, there will be a person called Volt in a foreign country, and Yang Heng uses it like this, it is also a habitual usage in the previous life, if it is changed to other usages, it is better to install it directly in the previous life, that is, it will be done once, if you change the writing or method in this life, if you accidentally say it is missing, you have to explain it again, and if you accidentally say it is missing, you have to explain it again, especially the children around Yang Heng are all human spirits, once Yang Heng says it differently, Isn't this easy to cause children's trouble, and this explanation once, if someone asks, you find Dandans to explain to you, yes, this sentence doesn't need to be made up. (To be continued......)