After listening to the speech of the chemistry student named Liu Xiang, Zhu Youzhen applauded and turned sideways to Wang Chengen beside him and said: "Let the Wensi Institute contact this student and support him to continue his research, this displacement reaction has a good role in promoting the technology of mining minerals, and may bring us good benefits." ”

"Yes, Your Majesty." Wang Chengen hurriedly nodded in agreement. Zhu Youzhen once again moved his gaze to the stage, and the speculation put forward by this student named Liu Xiang, if it can continue to go deeper, is the periodic table proposed by Mendeleev.

The biggest function of the periodic table is to confirm the existence of the periodic law, and only after the appearance of the periodic table has become a science that can predict the results, rather than the magic of fishing for pearls in the vast sea with your eyes closed.

But although Chongzhen was looking forward to Liu Xiang discovering the periodic table and seizing the honor that Mendeleev had obtained, he himself knew in his heart that this was almost an impossible thing to happen.

There are more than 100 elements in the periodic table, and in Mendeleev's time, only 63 were found. But it was centuries of human chemistry experiments, combined with Mendeleev's own genius, that led to the scientific speculation of the periodic table, which was ahead of its time.

Even so, the periodic table has not been recognized by the scientific community for decades.

At the beginning of the 17th century, both the East and the West, there were less than 20 kinds of chemical elements, less than one-third of Mendeleev's time. The difficulty of coming up with the periodic table on such a material basis is almost the same as the difficulty of God's creation of the world.

Liu Xiang's discovery may have made the periodic table appear a few days earlier, but it will never be today. And he is not the reason why Zhu Youzhen personally came to Yenching University today to listen to the academic seminar.

The next few people who published research papers obviously did not cause Chongzhen to be as shocked as Liu Xiang.

These discoveries about physics, chemistry, and mechanical transmission are not divorced from the body of knowledge of the known world.

The only slightly surprising thing was the discovery of a liquid transmission device published by two students and a teacher. This is different from the popular gear transmission method, and it has almost stood outside the door of the production principle of hydraulic presses.

Obviously, they only need to summarize the experimental data in their hands and summarize a law. In this way, Pascal's law will not have any connection with Pascal.

Of course, the most practical of these academic studies, and the actual one that has been produced, is a device for measuring atmospheric pressure that uses the principle of mercury vacuum experiment.

The mercury tank at the bottom of the glass tube is replaced with a skin pouch with an adjustable ivory needle to indicate the mercury surface, so that the local atmospheric pressure can be easily measured in the field.

More than a dozen physics enthusiasts made this barometer were made by more than a dozen physics-loving students, and their starting point for developing this instrument was to save the trouble of carrying experimental equipment when measuring air pressure at different altitudes in the field.

For these students, this is just an easy tool to reduce their love of physics experiments. However, when Chongzhen saw it, his heart couldn't help but move, the barometer actually has another purpose, which is used to predict changes in the weather, and the weather is sunny when the air pressure is high; When the air pressure drops, there will be stormy weather.

When he saw this barometer, he immediately thought to himself that maybe it was time to set up weather stations in various places. For agriculture, being able to predict the weather to a certain extent can avoid staggering economic losses.

Moreover, the more detailed and sufficient the data recorded by the meteorological station, the more accurate the forecast will be. In this period of frequent climate disasters in the Xiaoice River, there is no doubt that there is a great help.

Zhu Youzhen bowed his head and greeted Wang Chengen, asking him to contact the students afterwards, *100 barometers, or simply buy a patent for the production, and then invite them to continue their research on the connection between air pressure changes and weather changes.

When he was talking to Wang Chengen, Wan Hongsheng, whose face was a little blue, was wearing a new blue robe, and walked on the round platform in the middle with some frivolous steps.

Many people in the audience couldn't help frowning when they saw him, if they saw this Confucian outside the university, they might think of him as a frivolous child of that family.

Wan Hongsheng didn't pay attention to the whispering crowd below, he suppressed his excitement like a drum, tried to calm himself down, and made a good presentation of his mathematical arguments.

Wan Hongsheng's experience in the past few months is also quite surprising, he originally just wanted to take a lantern to the Academy of Sciences for a few taels of silver, so that he could take the test.

Unexpectedly, he met Chongzhen himself at the gate of the Academy of Sciences, and after listening to his idea, the emperor not only did not let people drive him away, but also funded a sum of money for him to study the gyroscope that was born from the rolling dragon.

Wan Hongsheng had to admit that Chongzhen's name was very appropriate, but all he wanted was to mix a sum of money to pass the exam, but he didn't think about what gyroscope he really wanted to study.

After getting the silver from the ministers sent by the emperor, Wan Hongsheng thought about dealing with it indiscriminately, and then read his four books and five classics to prepare for the exam. After the exam, it's not too late to ponder this gyroscope.

In Wan Hongsheng's opinion, Chongzhen has every opportunity, how can he put this mere 300 taels of silver in his heart, maybe he will forget about it in a few days.

However, he obviously didn't expect that Chongzhen really didn't pay attention to him anymore, but the minister who was sent to supervise the research process of the gyroscope had his eyes on him.

Although as a person who participated in the examination, he did not have to be afraid of these ministers. During the examination, even if it is an important minister of the six ministries, no one will have enough to eat and have nothing to do, to provoke an examiner.

After all, everyone is afraid that the candidates who will fail in the exam will find a reason to make trouble in the capital. In the case of the North and South List back then, wasn't it because the examiner had too close a relationship with several candidates, and as a result, a big case was set off and dozens of heads were chopped off.

If you really want to be dissatisfied with someone, are you afraid that you won't find a chance to start after the exam? But Wan Hongsheng can't say anything about this, this is an errand that he came to pick up by himself, and others just asked him to take money to do things.

Wan Hongsheng obviously can't say bluntly, he just wants to make a sum of money so that he can prepare for the exam. If this scholar pits the money of the eunuchs and wealthy businessmen in the palace, it will only be a laugh if it is exposed.

Everyone will only comment that the deceived person is too stupid, saying that Wan Hongsheng does things informally, and treats this matter as a conversation after dinner.

Those eunuchs and wealthy businessmen who were deceived, even if they learned afterwards that those who were more open-minded could only touch their noses and laugh at themselves, and those who were narrow-minded were just secretly looking for an opportunity to retaliate. will never be unforgiving, come to the door in broad daylight, and ruin his reputation.

But the 300 taels of silver are the emperor's money, and the nature is very different. Isn't it a deception to deceive the emperor in person. Although there is no shortage of officials in the Ming Dynasty who embezzle the emperor's money, there will never be such a blatant person.

A scholar who deceives the monarch in person, even if he passes the exam, has no future at all. This minister who oversaw Wan Hongsheng is another fool. It is estimated that this person is also rarely assigned an errand, and he is around him all day, so he almost asks to share a bed with him.

With such a minister who wanted to make political achievements around all day long, Wan Hongsheng had to pretend to start studying the positioning principle of this gyroscope.

Wan Hongsheng originally thought that this was just a matter of craftsmanship, but once he began to devote himself to research, he found that it was completely different from what he thought.

The more effort he put in, the more he failed, but the more interested he was in the principle of gyroscope positioning.

In such a situation, it is no surprise that the meeting failed again. Although Wan Hongsheng was a little sad, he soon put all his energy on the research of gyroscopes.

In order to gain more ideas and basic knowledge, he became an auditor at Yenching University on the recommendation of several academicians of the Academy of Sciences.

Wan Hongsheng, who had no talent in the Four Books and Five Classics, found his talent in mathematics and physics.

He quickly grasped the three laws of mechanics proposed by the emperor, and deduced that the key to making a gyroscope was a rotor that was constantly moving.

Under the current conditions, he found that he could not find a power unit that was small in size and could continue to provide power to keep the gyroscope rotating at a constant speed.

That is to say, the gyroscope cannot be made now, and when he told this conclusion to the minister who followed him all day, the minister asked him with a fluke mentality: "You have studied for several months, and spent almost a thousand taels of silver, have you come to such a conclusion, and there is no other benefit?" ”

Wan Hongsheng thought for a long time before he said cautiously: "Actually, I can't say that there are no benefits, according to my research."

The Earth is a big gyroscope, and it always rotates around an axis, so we can almost assume that the direction of this axis is basically fixed. ”

The minister asked with a confused expression, "What does this mean?" ”

Wan Hongsheng was entangled, and then made a decision: "It shows that the earth may not be a sphere, but an ellipsoid that is close to a sphere." ”

The minister finally threw up his sleeves and left, never bothering him again, and Wan Hongsheng was glad that he was finally free.

But he soon discovered that, in contrast to the meagre freedom, with the courtier had gone with him a comfortable place to live and a life that he did not have to worry about.

Wan Hongsheng's waist card for entering and leaving the Academy of Sciences was withdrawn, and his current status as an auditor was also only retained until the end of this semester.

Although he is now a penny, as long as he goes to the hometown hall in Beijing to have an autumn breeze, it is not difficult to return to his hometown.

However, after several months of research and study at Yenching University, he completely fell in love with the school life that was completely different from the atmosphere of Daming Academy. The study of physics and mathematics also made it unbearable for him to shut himself in his study and bury his head in the pile of old papers.

Just as he hesitated, Wang Dejin, a new professor in the Department of Mathematics, reached out to him, hoping that the auditor, who excelled in physics and mathematics, would be his assistant and complete the task given to him by Chongzhen to derive calculus.