Zhu Youxiao instructed the officials to find Xu Guangqi, Song Yingxing, and Bi Maokang, and the people in the officials were busy, and they didn't know what the little emperor was looking for these people, but it was ordered by the emperor, and they had to be found if they were hard to find!

Zhu Youxiao didn't care how they went to find people, he instructed Wang An to go to the Ministry of Industry to ask for a few shrewd and capable craftsmen, and took them to the prince's mansion where he originally lived.

According to Zhu Youxiao's instructions, the craftsmen found a few pieces of crystal stones, many of these things are natural, selected a few pieces of relatively transparent impurities less high-end goods, and under the guidance of Zhu Youxiao, the use of cow belts, wooden strips, iron nails to make a wooden simple grinder, why make a grinder, because its work efficiency is relatively high. Next, the craftsmen began to polish the crystal pieces, some of them into convex lenses, and some of them into concave lenses. Zhu Youxiao wants to make a telescope. Such a gadget, Zhu Youxiao did not tinker with it in the past, there were many scraps in the acquisition, and he couldn't bring it, no way, this thing can be used for a long time, whether it is a land war or a naval battle in the future, it is very much needed, since Galileo invented this thing, the West has begun to use it, but because there is no glass with good quality, the output is very small, and it is only used in a small range. What Zhu Youxiao has to do is the simplest Galilean telescope, which is very simple and practical.

While polishing the lenses, Zhu Youxiao also asked the craftsman to choose bamboo, choose which diameter is between one inch and one and a half inches, and choose the middle section of the column, which is round. Then grind until you select three sections, which can be retracted into one section like a telescopic fishing rod. Then, a convex lens is attached to the front and a concave lens is installed at the back, and the telescopic can adjust the focal length to observe distant and near targets. It took three days to finally give birth to the Zhu Youxiao bamboo telescope.

Zhu Youxiao is happy in his heart, this is good to be the emperor, just move your mouth, if you let yourself do it, I don't know how thick the calluses will be on my hands. A total of ten telescopes were made, and after selection and debugging, a total of six could be used, and the other four were not effective, so they were saved. The most shrewd and most skilled craftsman is called Zhu Ling, and he can understand every step of Zhu Youxiao's words very clearly, and as soon as he is happy, he rewarded him with two hundred taels of silver, which almost made him so happy.

The next thing Zhu Youxiao wants to do is a waterwheel, why does Zhu Youxiao want to make a waterwheel? Because Zhu Youxiao will face a drought next, almost all of northern China will suffer from drought. At the most serious time, Shaanxi, Yu, Lu, and Hebei were thousands of miles of red land, and there were no seedlings left, which was the Xiaoice River period, and natural disasters were difficult to resist. The waterwheel designed by Zhu Youxiao is a siphon waterwheel in the fifties and sixties, temporarily using a rope instead of an iron chain buckle, wrapping a knot with a cotton cloth instead of a leather pad, using a bamboo tube instead of an iron tube to absorb water upwards, and when a large amount of iron can be smelted, these are replaced with iron, and the efficiency is more. Because the groundwater level is very shallow now, it is not too difficult to dig a well, and the difficult thing is that no one can think of digging a well to water the ground, it is completely possible to water five acres of land every day with a waterwheel like this, and wait for two or three years in the northern part of the Ming Dynasty where there are conditions to install this kind of waterwheel, basically not afraid of drought. Zhu Youxiao's current waterwheel is just a work of art, and when Xu Guangqi and Song Yingxing come, just let them turn him into a waterwheel for use.

Then Zhu Youxiao went to the firearms factory, accompanied by Sun Chengzong, Luo Sigong, and the two generals elected by Sun Chengzong, Zhu Youxiao was most interested in Sun Chengzong actually summoned another famous general of the Ming Dynasty, Sun Chuanting, to his subordinates, it seems that Sun Chengzong still has a vision. When they arrived at the firearms factory, Wang Zuo, the secretary of the Ministry of Works, and Lei Mingtian, the chief manager of the firearms factory, were already waiting at the door.

According to Wang Zuo, this Lei Mingtian has been in the firearms factory for several lifetimes, and he is a master, and there has never been an incident of failure to sound or cannon explosion after he made it, but this guy likes to go to the * workshop to tinker and make a mess of the management of the firearms factory. Therefore, the Ministry of War sent a deputy general to manage the day-to-day production. Zhu Youxiao is overjoyed, doesn't he just need to find a technical maniac to study **! Okay, that's it.

Sun Chengzong was about to go to Liaodong, and the purpose of Zhu Youxiao bringing him here was to choose some weapons and ammunition, because the Ming army was generally not as good as Jianyu, so it must be equipped with powerful artillery fire.

So, Zhu Youxiao asked Lei Mingtian to take cannons and muskets for testing. Lei Mingtian took the musket from the hands of his craftsmen, "Long live Lord, look at this musket, it can reach a hundred paces, and the shooting accuracy varies from person to person, in the case of villains, it can shoot targets within one hundred and twenty paces, and it is good for ordinary soldiers to shoot at targets eighty paces away, and if it is farther, it can only rely on the luck of scattered bullets." Lei Mingtian said.

Then Lei Mingtian asked Zhu Youxiao and the adults to stay away, let people hang a human target at a distance of one hundred and twenty steps, and then lit the fire rope, and then heard a loud sound of "tom", a puff of black smoke came out, and then looked at the face of the target who shot it had become pockmarked on its face.

After watching the shooting of the bird's gun, and then looking at the shooting of the cannon, the cannon had already been loaded when the bird's gun was fired, and there was a loud "tom", and the solid iron bullet was shot out of nearly 300 steps, and then rolled out nearly 50 steps. In fact, the current cannon is an enlarged version of the bird gun, both the speed and lethality of the shot are very limited, but the effect of smashing the city wall when attacking the city is good, but that also depends on luck, it can't be used on rainy days.

Although Zhu Youxiao, who had seen modern firearms, was very disappointed with these guns, he still praised them and encouraged them to work hard, but they should pay more attention to safety, never have a water incident, and told them to store saltpeter, sulfur, and charcoal separately, more than 100 steps apart.

Seeing that these guns had little effect on the cavalry-based Jianlu, Zhu Youxiao was very depressed. I suddenly remembered the "conscienceless cannon" used by the People's Liberation Army during the Liberation War, which was to use iron oil drums to throw * bags, but where to find such thick iron drums now? Pregnant! Two cannons, right! It's this kind of thing, this kind of thing is very simple, put some loose * at the bottom, a layer of loess in the middle, and more * on top, and with the explosive force of the bottom * you can hit the upper part very high.

"Thundering sky." Zhu Youxiao shouted.

"The villain is here." Lei Mingtian was so frightened that he knelt on the ground, he didn't think why the emperor suddenly shouted.

"Thundering God," Zhu Youxiao said, "I suddenly thought of something to see if you could make it." ”

Then, Zhu Youxiao drew a simple image of the two cannons, and Lei Mingtian immediately said that there was no problem. Then Zhu Youxiao drew another iron cylinder, and made the bottom of the iron cylinder into a movable ring sleeve, so that a small cannon that fired a miniature * package was made.

Zhu Youxiao ordered Lei Mingtian: "Immediately develop this kind of small cannon, record every data of the test in detail, calculate how far it can explode according to the length of the firing line, record how far it can hit according to the angle of inclination of the barrel, and record the distance that can be reached according to the quantity of the base medicine." In short, if you can make this kind of cannon well and record all the data, I will make you a viscount. ”

"And then there's this." Zhu Youxiao slingshot-shaped fork, "You give this thing to the people below to make it, come to about 50,000 pieces, and it must be done before the beginning of spring." ”

"Yes, the villain will definitely live up to His Majesty's expectations!" Thunder replied.