In April of the sixth year of Longjing, the "Emperor Ming Bulletin" spread the good news again, and Queen Duan gave birth to a son safely, and the name Zhu Heyin was entered into the genealogy. After Taizu, the emperors of the Ming Dynasty have rarely been so prolific, especially since all the sons were born in the middle palace, and none of them died young, which is rare in ancient and modern times. Qin Tianjian is almost about to report to Xiangrui and go down in history because of this.

Empress Duan has not yet been confined here, and Zhou Hou has been urged several times and has to go out with Emperor Taishang Chongzhen. When she went to Baoding, she was still worried about her daughter-in-law who was in confinement, and even wanted Concubine Yuan to accompany Chongzhen Nanxing, and she returned to Beijing by herself, but she was finally persuaded by the female officials around her, and she did not make any unpleasant trouble.

The so-called no saint by the pillow, as Chongzhen's wife of the dregs, Zhou Hou has no fear of the emperor.

Zhu Cihong sent his father and queen mother all the way to Daming Gate, and finally settled a major event. Although Emperor Nanxing's project did have a great social effect, and even the commercial processes in the areas along the route have developed significantly, it is not good to feel urged all the time.

Duan's couldn't go out to see the wind, he couldn't see him off, and his mood was naturally not too good. She is not worried about her aunt, but about Qiuguan. Even if he knew that the crown prince would not suffer hardships along the way, the worry of the mother of the child could not be exempted.

As soon as the emperor and the crown prince left, the palace seemed to be much deserted. Zhu Cihong simply carried out the overhaul of the Qianqing Palace, mainly to build sanitary water and floor heating pipes.

Now the traditional heating method in the palace is still the earth fire dragon and the fire wall, although the effect is good, but the waste is also large. Many officials and gentry have begun to use copper and iron radiators to circulate water in boilers for heating, which is trendy and affordable compared with traditional fire dragon fire walls.

Although Zhu Cihong is still worried about Zhu Hegui's ideological problems, he thinks that when he first entered the university to study law, he was full of naïve feelings of upholding justice and defending his belief in law. But after all, he became a realist who pursued success, so the crown prince may also turn to reality in the future and return to his own side.

With the advancement of the renovation project of the Forbidden City, Zhu Cihong also had time to sort out the various civil technologies of the Ming Dynasty. In terms of the general direction, Daming is still taking the road of steam machinery civilization. Because of the continuous progress of steam engines and metallurgical processes, some factories and mines in Liaoning have now begun to lay railroad tracks. The use of steam locomotives for short-distance transportation can be regarded as a sprout.

In a small way, mining forged cement is obviously very profitable, so much so that now people in all prefectures and counties across the country have opened cement factories. These factory owners are not all aiming to make money, because many of the big officials and gentry adhere to the "small peasant consciousness" and produce whatever they need.

Because his family needs to build a house and repair roads, he simply gets a cement factory to burn cement, not only can he get cement at cost price. It can also be sold to neighbors and even the imperial court. Because transportation costs remained high, the imperial court also preferred to purchase locally.

Of course, prefectures and counties where conditions can also set up government-run cement plants, but the officials who do so are mainly to promote the transformation of the professional population and make political achievements. Many of these officials were dismissed as a result, not because of corruption, but because of the poor management of the cement factory. The guide zhì failed the examination.

"How did that thing work?"

Zhu Cihong leaned back in his chair, trying to search for memories from half a century ago.

Truly. That is the dividing line between the two eras, and it is also the key to mankind's true entry into the era of science and technology. It does not require a detailed accumulation of knowledge, and even primitive people can verify it with their senses.

That's electricity.

To say that electricity and magnetism are inseparable. As early as hundreds of years BC, the compass was invented in China, and the Greeks also discovered the phenomenon of static electricity. Later, the compass became a compass, and Europeans discovered that friction could artificially create static electricity. However, according to the historical script of Zhu Cihong's previous life. It will be another century and a half before electricity, which can really cause a revolution in the productive forces, will appear by chance.

It was an accident caused by a frog's leg.

The Italian scholar Galvani, while handling a frog's leg for his wife, which was a drug in Europe at the time, accidentally discovered that when he touched the frog's leg with a metal fork, the frog's leg twitched.

This phenomenon is called discharge.

Of course, Galvani was aware of this phenomenon though. But didn't know what they found. He had to go through a lot of practical yàn to eliminate the electrification of the dishes, the bioelectricity in the frog's legs, the external influences...... And so on, and finally it was discovered that by mixing two different metals with salt water, an electric current could be generated.

Of course, these are meaningless to Zhu Cihong, even with the science level of his liberal arts students, he can directly copy the voltaic stack.

Volta was a friend of Galvani's son, who used zinc and copper sheets to fold pieces of paper soaked in salt water to form a stack to generate an electric current on the basis of Galvani's real yàn, and this device came to be called Volta stack. He also placed zinc and copper sheets in cups filled with salt water or dilute acid, and connected several of these small cups together to form a battery pack to increase the intensity of the current.

Zhu Cihong no longer remembered the various metals in the voltaic sequence, but he was not worried, and it only took one day for this arrangement to be handed over to the graduate students in the university research room.

In addition to the power supply, you also need wires. Silver and copper are excellent conductors, and as long as you look at the cloisonné enamel ware in the palace, you can know that it is not difficult to make a wire for it. As for the outer insulation, dry wood can be used, and if you are careful, you don't even need insulators.

If a light bulb can be manufactured, then the whole current lighting process is complete.

Well, then you still need to "invent" the light bulb.

At that time, Edison also took great pains to make the light bulb material, and carried out a lot of practical work, and finally obtained bamboo charcoal filament, which can emit light for a long time, as the ideal material, and made the first incandescent lamp. Of course, these time and material inputs can also be saved, and Zhu Cihong can directly let people prepare bamboo charcoal silk.

Although there is no way to fill the inert gas and the rare tungsten has not been found, for the real yàn and the germ of science, even a short period of light is enough to go down in history and lead future generations forward.

What really made Zhu Cihong bother was the manufacture of hand-cranked generators and wired telegraphs.

Although the principle of both is very simple, it is only that the coil and magnet are cut by magnetic field lines to produce current, and the wired telegraph only needs to be made in the real room, and it is enough to be able to transmit "di" and "da" and long and short lines...... But Zhu Cihong really has no talent in mechanical design, and the hand-cranked generator and the wired telegraph have only been linked to the illustrations in books, so after a gap of several decades, how easy is it to reproduce them?

"Su Yao," Zhu Cihong called, "ask Song Yingxing to bring fifty outstanding teachers and students to Beijing immediately." Inform Jingshi University, prepare a hundred physicists, settle the family, and prepare to do a high-secret project. ”

Lu Suyao hadn't seen His Majesty the Emperor so excited for a long time, and she also perked up and said, "The minister will go and inform you." ”

"That's right! Let the inner palace supervisor prepare a real yàn field, which should be enough for one hundred and fifty people to live in, and the real yàn room...... It cannot be less than the sum of the Wuying Hall and the Wenhua Hall. Before Song Yingxing and them arrived in Beijing, they had to be ready. It doesn't matter if it's new or rebuilt. Zhu Cihong said.

……

"What is this?"

Thousands of miles away from America's waist, Zhu Hezhi pinched a gray-white sphere in his hand. The sphere is not very round, but it is quite elastic, and it is made of a material that has never been seen in the Ming Dynasty.

"Back to Your Highness," replied the guard who found the ball, "it's a local game......

"I know it's a ball." Zhu Hezhi interrupted the guard: "What I asked is what material this ball is made of." I don't seem to have such a thing. ”

"Your Highness, the lower officials have already inquired." The clerk on the side hurriedly stepped forward and said with a smile: "There is a kind of tree here, which the natives call the tree of tears." When the tree is cut, milky white resin flows out. This kind of ball is made of resin. ”

Zhu Hezhi squeezed the resin ball hard and muttered, "What can this thing do?" ”

"This stuff goes well with charcoal." The clerk smiled: "In the past, if you made a mistake in charcoal writing, you could only draw a circle. Xia Guan tried to wipe it with this resin ball, and found that it could actually erase the charcoal characters...... It's not very clean, though. ”

"It's not going to be of that use." Zhu Hezhi was a little disappointed. Charcoal was not meant to be used by the elite, for example, he himself had never used charcoal before he got on the ship. In that case, what is the use of a tool used to erase charcoal handwriting?

"Anyway, it's a local product, so you can take it home and make it into a ball for your children to play with." The previous guard spoke.

Zhu He ended his last supply from Kuwu, and the fleet went straight north along the coast, crossing a strait to be named by the emperor, and then reaching the northern part of the American continent.

Because of the ice and snow there, the climate was dry and cold, and after the boundary monument was dropped, the fleet went south along the continent and found several significant landmarks hand-painted by the emperor, which was even more shocking to the emperor's majesty.

It wasn't until the fleet entered New Spain that Zhu Hezhi was truly resupplied. The remaining Ming merchant goods on the ship earned him the capital to continue southward, and finally came to the waist of America, which is the dividing line between the north and south of the American continent, and has the style of another world.

"It's very ...... to bring this kind of worthless thing back" Zhu Hezhi just wanted to veto, but after thinking about it, what he brought back was what the Spaniards had already sold, and it would not be beneficial to give it to the emperor. Although this tear tree is useless, Da Ming does not! Scarcity is expensive, but it can also be counted as tribute.

"Bring less," Zhu Hezhi said, "It's almost enough to move fifty plants." The seeds don't take up space anyway, so bring two or three sacks for you. I think this tree is quite beautiful, but I don't know if it can be planted in Beijing. (To be continued......)

PS: Today's golden finger is open again, I wonder if someone will open their brains and enlarge the real room level to the industrial level to criticize Xiaotang?