Xu Fuyuan and Xia Yunyi carefully understood every word Zhu Cijiong said, and looked at the experimental equipment on the table from time to time, and their eyes gradually showed an excited look, a magical door was opening to them, and countless sparks of wisdom flashed in their minds.

If no one bothers them, they may have been thinking and researching, an hour, two hours, half a day, a day, or even a few days, and the scientific madmen of later generations will be engaged in research for months and months as adults, and some people are even too lazy to spend time trimming their edges, and their beards are unshaven, like a homeless man, and Xu Fuyuan and Xia Yunyi seem to have this fanatical tendency.

Zhu Cijiong took great pains to demonstrate and explain the laws of electromagnetic induction to them, of course, not for the purpose of allowing them to engage in scientific research, perhaps in the future, they can completely understand the principles of electromagnetism and become experts in electromagnetism to engage in scientific research, but now the most important problem is to make a steam generator and a wired telegraph sending and receiving device.

If they continue to think about it, I am afraid that they will 'go astray' and think of other aspects, Zhu Cijiong hurriedly coughed and interrupted: "You can slowly ponder these truths in the future, but you must remember that when we study the supreme principles of heaven and earth, we are not studying them for the sake of studying, but for the purpose of applying them to practice." This time, I let you understand the principle of electromagnetic symbiosis in order to make something very useful to the Ming Dynasty, and then I will show you again, you have to look carefully. ”

After that, he glanced at Cao Huachun again, and soon two more eunuchs came up with two delicate wooden plates. This time it was brought up two very delicate little things, both made of thin pieces of iron similar to the spring blades of a flintlock pistol, one was to fix a small piece of iron to a small wooden frame, one end of the iron piece was nailed to the wooden frame, the other end was slightly tilted upward, and there was a brass bell under the iron piece; The other is fixed to a thick wooden board, one end is also nailed to the board, and the other end is slightly tilted upward, and a small piece of wood seems to be tied to the top of the thin iron sheet, but under the iron piece is a nail.

Xu Fuyuan and Xia Yunyi naturally didn't know what these two strange little things were used for, and Zhu Cijiong didn't explain, but operated it himself, he first buckled the iron piece with gold wire from the thick wooden board and erected it there, and then placed the small wooden frame on top of the iron block, so that the iron piece was just facing the thin iron piece on the small wooden frame.

After doing this, Zhu Cijiong pointed to the wheel tied with an iron sheet and said to Xu Fuyuan: "You come to the wheel to return to fasting." ”

Hearing this, Xu Fuyuan hurriedly stepped forward and grabbed the handle of the wheel and turned it hard, he had just turned it twice, and there was a soft sound of 'ding', and the thin iron piece on the wooden frame was sucked down and smashed on

on the small bell.

At this time, Zhu Cijiong raised his hand and said, "Stop." ”

Xu Fuyuan hurriedly stopped, and the thin piece of iron bounced back again.

Zhu Cijiong ordered again: "Turn again." ”

Xu Fuyuan hurriedly turned it up again, but the thin iron piece was naturally sucked down again, and it smashed on the small bell with a soft sound.

Zhu Cijiong raised his hand again to let Xu Fuyuan stop, pointed to the small wooden frame and asked, "Think about what this thing is for." ”

This question really stumped Xu Fuyuan and Xia Yunyi, can't you just ring the bell, if you want to ring the bell and knock it directly with your hands, it is much easier than this.

Seeing that they were pondering and making no progress, Zhu Cijiong had to point to the gold wire and remind: "What if this gold wire is very long?" ”

If it grows to a few miles or dozens of miles, it naturally has many uses, and it can convey a lot of simple information every time the number of rings is different, but Xu Fuyuan and Xia Yunyi have fallen into a misunderstanding, they both subconsciously think that this golden wire can be dozens of meters long, in that case, it is better to directly tear out the throat and shout quickly.

Seeing that they still hadn't come up with it, Zhu Cijiong didn't embarrass them anymore, and directly reminded: "For example, directly pull the silk thread from the beacon tower on the Great Wall to the nearby guard post or even command the envoys, if there is a foreign enemy attacking, ring the bell, in that case, there is no need to light the beacon fire, and even the approximate number of enemies can be reported through the number of bells." ”

Xu Fuyuan and Xia Yunyi were dumbfounded when they heard this, how long it had to be, they couldn't figure it out, how could such a thin silk thread be stretched so long and not break? And, is it worth the effort to deliver such a simple message? It would be better to arrange for a few more soldiers to use arrows or fireworks or something!

Zhu Cijiong saw the doubts in their hearts, but he didn't explain it immediately, but continued: "Let's not talk about this for the time being, I will show you it again." ”

So saying, he untied the joints of the gold wires, placed a thick wooden board nailed with a thin piece of iron in the middle of the joints, and then wound one end of the gold wire around the nail that nailed the thin sheet of iron, and the other end around the nail under the thin sheet of iron.

After doing all this, Zhu Cijiong pointed to the wheel tied with an iron piece and said to Xia Yunyi: "Yi Zhong, you come to turn the wheel this time." ”

Hearing this, Xia Yunyi hurriedly stepped forward and grabbed the handle of the wheel and turned it vigorously, the loop of the golden wire was broken, there was no electricity in the coil, and the thin iron sheet naturally did not move at all, with the experience of the different results of the last experiment, he was no longer so panicked, but carefully thought about what was going on while turning the wheel.

Zhu Cijiong didn't mean to test Xia Yunyi, but someone needed to keep turning the magnet gold wire to have electricity, he didn't care what Xia Yunyi was thinking there, but walked up and gently pressed the thin iron sheet on the thick wooden board, as soon as the thin iron sheet contacted the iron nail below, the coil was connected with the current, and the thin iron sheet on the wooden frame was naturally sucked down again, and with a 'ding' sound, the small bell below was ringed again.

He didn't stop there, but pressed every two moments, and the little bells rang rhythmically with his click.

Such a miraculous thing Xu Fuyuan and Xia Yunyi are simply unheard of, does the emperor really have divine power! They were all stunned for a moment, staring at the simple button in Zhu Cijiong's hand and the bell that kept ringing softly, completely losing the ability to think.

Zhu Cijiong didn't expect that a simple switch could surprise Xu Fuyuan and Xia Yunyi like this, and he quickly explained: "It's actually nothing, I just said it, Jin."

When the loop formed by the genus is used to cut the movement of the magnetic inductance line, electricity will be generated in the metal loop, and this loop must be connected, once it is disconnected, it is not a loop, what I am doing now is to connect and disconnect the loop, and disconnect and connect, and there is electricity in the gold wire, and the thin iron sheet will naturally go up and down. ”

Xu Fuyuan and Xia Yunyi came back to their senses when they heard this, and they looked at the loop of gold wire suspiciously, still a little incredulous.

There is nothing more intuitive than doing it yourself, Zhu Cijiong beckoned to Xu Fuyuan and said, "Fuzhai, you come and try it." ”

Anyway, step aside.

Xu Fuyuan couldn't wait to step forward, and followed Zhu Cijiong's appearance and rhythmically pressed the simple switch, and the little bell of 'ding', 'ding', and 'ding' really rang again.

It turns out that as the emperor said, things are as simple as that, there is electricity in the gold wire of the Unicom loop, and the thin iron sheet will be sucked down and ringing the bell, and there will be no electricity in the gold wire when the loop is disconnected, and the thin iron sheet will automatically bounce back because of elasticity, which is not that the emperor has any divine power, ordinary people can also do it.

Zhu Cijiong saw that they showed a suddenly realized expression, so he continued to guide: "Can this convey a lot of information to distant places?" ”

Xu Fuyuan couldn't help but nod and said, "If the golden wire is long enough, it can indeed convey a lot of simple information to the distance." ”

Zhu Cijiong shook his head when he heard this: "No, it's not just simple information, any information can be transmitted!" ”

Xu Fuyuan and Xia Yunyi were shocked when they heard this, and even the movements in their hands stopped, how could this be possible, what complex information can a simple bell convey!

Zhu Cijiong knew that they would not believe it, and then explained: "We can number all Chinese characters, for example, according to the order of thousand-character texts, 1 represents the word for heaven, and 2 for the character

Ground characters, 3 represents Xuanzi, 4 represents yellow characters, there are two or three thousand commonly used Chinese characters, and the code is compiled to more than 3,000 at most. ”

It seems to be very reasonable, but there is a question that has to be considered, Xu Fuyuan plucked up the courage to ask: "Your Majesty, please forgive Weichen for his courage, the number is no problem, dozens of fronts."

It's easy to say even a hundred or so words, at most it's a hundred, but what to do with the next hundreds or even thousands, press hundreds or thousands in a row, how long does it take, how can you ensure that the one you accept doesn't fall into full pairs! ”

When Zhu Cijiong heard this, he rolled his eyes and said angrily: "Who said that you have to press hundreds or thousands, have you forgotten the exam questions I gave you?" Suppose the party who sent the report

Press the switch according to a certain rhythm, such as every two moments, if you press it, the bell rings on behalf of 1, if you don't press the bell and don't think about it, it means 0, if you use a four-digit binary code, 9,999 only needs 16 intervals, 32 instants, and 6 finger fingers. ”

Xu Fuyuan and Xia Yunyi suddenly realized when they heard this, they fully understood what the emperor meant, using the four-digit binary code 1 is 0001, 2 is 0010, 3 is 0011......, 9 is 1100, 12 is 0001, 0010, 123 is 0001, 0010, 0011, 3999 is 0011, 1100, 1100, 1100, 1100, at most press ten or so, so there will be no mistakes.

They couldn't help but become extremely reverent when they looked at Zhu Cijiong, the emperor is really a god, he can come up with this kind of method!

At this point, the basic professors of Xu Fuyuan and Xia Yunyi are completed, with their ingenuity, as long as they study hard and ponder diligently, they will definitely become experts in electromagnetism in the future, and the simple models of steam generators and wired telegraph transmission and receiving devices have been demonstrated to them, and it is only a matter of time before they can make finished products, and they will ...... when the time comes.

Thinking of this, Zhu Cijiong couldn't help but be proud, he looked at the sky outside the window, and said proudly: "With this set of things, distance will no longer be a problem, I want to telegraph the line."

All over the Ming Dynasty and even all the vassal states, when the time comes, what happens anywhere, can be transmitted to the capital in less than an hour, in the future, there is no need for the post guards to run dead and live to transmit information, no matter how wide the territory of the Ming Dynasty will be, with the telegraph, even the end of the world will become a stone's throw away! ”