It was very difficult to build generators and wired telegraph sending and receiving devices in the Ming Dynasty. The main difficulty lies in the production of wires. It is really not a problem to put them in modern times. There are everywhere inside and outside the house, and they can be bought in grocery stores in any small town, but it was not necessary to buy them in the Ming Dynasty. Not only the Ming Dynasty, but the whole world does not have this thing.

Is it difficult to make wires? Modern people may not understand that it is obviously a very common thing, everywhere, so what is difficult to make?

First of all, it is difficult to draw wires. The copper wires in the wires are all pulled out with copper rods. At that time, there was no wire drawing machine to buy them, so you had to make them yourself. You have to squeeze out the copper wires like noodle, how strong it is, and how hard the wire drawing dies that bear the pressure of extrusion are. Moreover, it is not like just squeeze out the copper wires. You have to straighten the copper wires according to the speed of extrusion and roll them into rolls. The speed of rolling is also strictly required. It is not possible to be fast or slow. If the copper wires are fast, they will be pulled off, and if they are slow, they will be squeezed into a ball of twists. This synchronization is not easy to grasp.

Then, it is not enough to just pull out the copper wire. The wires are used to transmit electricity. The outside must be covered with an insulating layer, which is what the saying goes. Modern wires are basically covered with plastic insulation layers, and plastic is extracted from oil. At that time, oil was not difficult to find, but it was difficult to extract plastic from black oil than to make wires. Thinking about it, Zhu Cijing gave up. In fact, the insulation layer can be replaced by rubber. Rubber is much easier to produce than plastic, just process the juice of the rubber tree slightly. The origin of rubber is South America, now a colony of Spain and Portugal. As long as Zhu Cijing said, the Governor of Macau, Portugal, Schvira, and Spanish Governor of Luzon, Coquían, will definitely rush to find rubber from the Americas.

As the saying goes, everything is difficult at the beginning. As long as the wire is made, the generator and wired telegram sending and receiving devices are relatively simple.

For example, for generators, you can cast the shell with a wooden mold and then put it on the machine tool for processing. There are also ready-made bearings, and magnets are not difficult to find. The winding is similar to spinning, but the yarn has become a wire. The wire sending and receiving device is simpler. To put it bluntly, just use the wire to scatter a few times on a small iron rod, make an electromagnetic, and then the entire switch is enough.

Of course, these simplicity is just for Zhu Cijing alone. For the Ming Dynasty and even everyone else in the world, these are unimaginable things. Don’t be able to say it’s right, there is no concept of electricity at this time. Zhu Cijing is also having a headache about this problem. He is the emperor and it is impossible to run around coils and make electromagnets. If this set of things is made, the demand will be extraordinary. Each county town must have at least one set. Think about the number of Zhu Cijing’s scalp is numb. If he wants to do it alone, he will probably never be able to walk around coils in this life.

What will no one do? Then there is only teaching. Of course, as the emperor's honor, Zhu Cijiu could not go to Daming Institute of Technology to teach as a teacher. He could only choose one or two people to teach separately, train them into mechanical and electrical talents, and then let them teach others.

The question is here again. Study science, especially physics, talent is very important. You will understand talented people as soon as you say it. If you nag without talented people in his ear for a year or two, he may not know how to nag in his ears for a year or two. Zhu Cijing didn't want to teach with a lump of wood for a few years, so he decided to choose a small-scale selection.

What is the talent for studying science? Someone has summarized this. To say that the abstract is smart, especially smart, and to say that the specific is flexible thinking and strong logic. How to judge whether a person is smart or not? It is naturally a test. For this reason, Zhu Cijiu personally gave a test question, convened a group of Jinshi students in the Jiaxu class of the seventh year of Chongzheng, and organized a special palace examination, called Bingzi Enke.

The people he organized this time also have some considerations. First of all, the age must be around thirty years old. If he is too old and his thoughts have been solidified, it will be more difficult to accept new knowledge; and he must be loyal and upright, and he does not want to train a white-eyed wolf. As for why he only selected from the Jinshi in the seventh year of Chongzheng, age is a factor, because there are basically no one under the age of forty among the Jinshi in the fourth year of Chongzheng and the Jinshi in the fourth year of Chongzheng. Another more important reason is the position issue. The people he trains are at least third-rank, or even second-rank first-rank, and it is not possible to have a title without a Jinshi.

Based on these conditions, less than 30 people finally met the requirements. Looking at the top of these scholars, Zhu Cijiu couldn't help but feel agitation. You must be brave enough. My requirements are not high, as long as one or two can answer correctly.

Even he is so nervous. What kind of difficult questions did he come up with? In fact, this question is not difficult for modern people at all. As long as he has been to college, he can basically do it. The questions he asked are:

Now, 0 is zero, 1 is one, 2 is two, 3 is three, 4 is si, 5 is jun, 6 is rust, 7 is seven, 8 is eight, and 9 is nine, which is used to simplify the numbers.

The current counting method is to be decimal, such as 0 to 9 are ten numbers, and the rear carry is 10, which is to be picked; 10 to 19 are both ten numbers, and the rear carry is 20, which is to be picked, and so on.

If you only use the two numbers 0 and 1, and when you encounter a two-way position, 0 is still zero, 1 is still one, 10 is actually two, 11 is actually three, and 100 is actually wild.

If counting by binary method, 1010 is actually geometry, and 1110 is geometry?

If you write in binary method, how to write 7 and how to write 9?

This is actually the basic content of logical algebra in advanced mathematics binary code. For modern college students, it is very simple. But for these ancient college students, even equivalent to master's and doctoral students, this is simply a waste of their lives!

Zhu Cijing stared at the candidates nervously. A quarter of an hour passed, two quarters of an hour passed, some were full of surprise, some were confused, and some were thinking hard, but none of them started writing.

His heart slowly sank, but he only gave one hour, because this time we were going to test whether they were not flexible in thinking and had strong logic. If they gave it too long, it would lose meaning. Whether this question was difficult, he believed that if these people were asked to go back and study for ten days and half a month, no one would not be able to answer it, but what could that prove? At most, they would only prove that they were not stupid, and it had nothing to do with science talent.

Half an hour later, a candidate finally picked up his pen, but he looked at the test questions on the table and was stunned again.

Zhu Cijing kept staring at them. Someone picked up his pen now. He was so excited. Why was this person stunned again? He thought about it, patted his forehead, immediately waved to Cao Huachun over and whispered.

Soon, a group of eunuchs walked in carefully with a thick stack of white paper, quickly put a stack of pieces on each candidate's desk, and then carefully retreated.

Most candidates were stunned when they saw the stack of papers. Looking at the test questions they sent, they obviously asked to answer them directly at the back of the questions. Now they sent a stack of papers to each person. What does this mean?

They don’t understand, but they naturally understand. The candidate who just picked up the pen immediately felt like he was a treasure when he saw the stack of white paper. He excitedly put it on the premise and started writing quickly.

Seeing his confident look, Zhu Cijing couldn't help but stand up and walk over to see what he was writing. Is he drafting and making simple calculations as he thought.

The emperor actually ran down in person, which was not common in previous palace examinations. Although the candidates present had already had high school Jinshi and were officials in court, they were a little nervous. Only the person who wrote quickly might be too involved and had no reaction at all, and they were still writing there none.

Zhu Cijiu walked behind him and saw that a piece of draft paper was almost filled with him. At that time, the Ming Dynasty was a habit of writing vertically, so he naturally wrote it in columns. The first column was capitalized zero to nine, the second column was Arabic numerals 0 to 9, the third column was capitalized nine, the fourth column was Arabic numerals 10 to 19, the fifth column was capitalized two to two to nine, and the sixth column was Arabic numerals 20 to 29, which was written neatly, with even spacing between characters, as if measured by a ruler.

At this time, he had already started to calculate. He took a piece of paper again. The first column he wrote capital zero and one, the second column he wrote Arabic numerals 0 and 1, the third column he wrote capital zero and one and one, the fourth column he wrote Arabic numerals 10 and 11. When he wrote to the fifth column, he paused for a moment, looked at the topic carefully, and then decisively wrote down 100, 101 and 111, and the sixth column was 100, 101 and 111.

Seeing this, Zhu Cijing also showed an excited expression, with such flexible thinking and strong calculation ability. Don’t think about it, this person must have figured it out.

Sure enough, the candidate quickly wrote down 1000, 1001, 1001, 1011, and 1111 in the seventh column. Then he counted carefully and answered decisively after the test questions:

If counting in binary method, 1010 is actually a pick, and 1110 is actually a pick.

If written in binary, 7 should be written as 111, 9 should be written as 1001.

It was completely correct. Zhu Cijing resisted the urge to applaud and slapped his signature on the test paper. Xu Fuyuan, yes, it's him. Even if everyone else can't answer it, it doesn't matter. This one is enough.

However, Zhu Cijiu miscalculated this time. When the candidates saw him return to the dragon throne with satisfaction, they all knew that Xu Fuyuan was probably right. Although no one went to peek at his answer, many people imitated him and wrote it on white paper. After an hour, the test paper was collected, and one person actually got the right answer, but the name was a bit strange, and it was Xia Yunyi.
Chapter completed!