Jiang Tian, who came to the workshop again, saw that Song Yi no longer had his usual demeanor, and looked at himself sluggishly with two dark circles under his eyes, which shows how much energy he has put into developing a telescope during this time, even then he still failed to come up with a qualified product. Jiang Tian didn't talk nonsense, this time he put away his cynical attitude, because the pressure of the economy made him have no other choice, and at the moment he had to get the reward money as much as possible. He picked up a piece of lens, looked at the object in the distance, and then could only shake his head, even if some small workshops in later generations made defective products were of better quality than this thing, the focus of the entire lens was completely misaligned, and the arc was even incoherent in many places.

"How did you use the new equipment to sharpen your lenses?"

Song Yi didn't know why, so he had to point to the grinder not far away: "Just do what you say?" ”

Jiang Tian walked over and took a look, only to find that the fixing fixtures he designed did not work at all, and the grinding craftsman still used his hands to find the right angle little by little. The problem is not to make a pot and pan is almost on the line, the grinding of optical lenses is an extremely precise process, even if the Japanese industry is so developed in later generations, but no matter how hard they try to reach the grinding level of Germany and the United States, it is estimated that these craftsmen who have never done this kind of work have figured out the complete operation process, and I don't know how many lenses will be consumed.

"How many blanks do we have in stock?"

Song Yi sighed regretfully: "Not much." ”

Jiang Tian nodded: "It's better to stop work first, and I'll improve the machine again." ”

At this time, the other party frowned, and if the work is stopped, I am afraid that he will not be able to catch up with the progress, but there is really no good way to solve this problem at the moment, he can only ask tentatively: "How sure is it this time?" ”

"Don't worry, I also want to get the bounty as soon as possible, and this time I will put down roots here with you......"

After a few days, Jiang Tian started from the basic theory, taught these craftsmen to give up their fingers, and instead believed in the positioning tools he designed, and he corrected production habits while redesigning the grinding system. In this process, first Song Yi, who was exhausted, couldn't support it and found a place to rest, and Zhao Zhi, who had been following him as a housekeeper, couldn't stand it anymore, and was sent back to the city by a pervert, and then Liu Baokai had to come here every day for a few hours, bringing some wine and food to visit these two technical maniacs. After a few days of tracking production, Jiang Tian finally found the problem, although the existing grinding disc is arcanut, but the direction of grinding is always a concentric circle, so that whether it is a grinding disc or abrasive, as long as it is a little inaccurate, it will leave a circle of traces on the blank, how can not be eliminated. If the angle of the grinding disc is slightly crooked, then the focus will definitely not be aligned.

"What should I do?" Even if the crux of the problem is found, Song Yi still feels at a loss, to be honest, Jiang Tian's improved machine efficiency has been doubled, they now use this set of equipment to process coarse materials, and then hand over the lenses to some old craftsmen with dexterous fingers, with years of craftsmanship and experience, they can also grind a similar finished product by hand, after assembling it into a telescope, not to mention that the effect can already reach the level of Xiyi.

"Still can't do it......" Jiang Tian was not so easily satisfied, looking at those finished products with a little phantom or color difference, he naturally classified them as defective products from later generations: "It seems that I can only find a way to grind the means." ”

Liu Baokai, who doesn't know anything about technology, also thinks that Jiang Tian is a little dead-eyed, you said that this kind of product can already make many generals break their heads and rush to ask for it, and unlike Xiyi's things, we are binoculars, even if it looks a little ghosted, it is normal, anyway, you can see the general outline of the enemy, do you really expect to see Chang'e in the Moon Palace? He thought so in his heart, but since the name of Chang'e came out, he thought about it and thought about it, which is also a normal reaction of a born molested man, so a convex lens lens that he has been playing with in his hand has been beaten, and it naturally becomes an action of stroking a certain part of a woman in his hand, not to mention that it is a little similar in shape. He was thinking about it on the side, not knowing that Jiang Tian was staring at him with a surprised look, or rather, his hand staring at him.

Song Yi also saw the pervert's movements, but he knew his friend too well, and he admired his ability to touch the scene all the time, it was difficult to be like such a playboy who would inherit the title of Duke of Guo in the future, so it would be difficult for the Liu family to make great achievements in the future.

"Ahem......" Song Yi really couldn't stand it: "Yijian, if you have nothing to do, go back today." ”

Jiang Tian let out a sigh, looked up at the sky and shook his head, then walked to his side and patted the shoulder of the pervert for unknown reasons: "I never thought that lust would be so useful!" ”

Liu Baokai and Song Yi were stunned, they didn't know what kind of medicine he was selling in the gourd, and the pervert who was confused had to ask Song Yi: "Brother Dexin, Brother Muhua won't be a demon with you, right?" ”

Sent the pervert not to mention, Jiang Tian picked up the pen and began to redesign the grinder, this time he was no longer a small repair to modify the original design, but the whole machine qì except for the rotating base all disassembled, and designed a new grinding disc like a wine glass, handed over to the blacksmith in another yard to make it with stainless steel, and explained that it must be made by the most skilled master himself, because he has extremely strict requirements for the spherical space inside the steel wine glass, and after it is made, it must be measured with an earthen caliper made in the past two days. There is no room for error.

Song Yi curiously picked up the new design and looked at it twice, and patted his thigh like waking up from a dream: "Why didn't I think of it!" ”

Jiang Tian was inspired by the pervert and began to develop a spherical grinding disc that was widely used in later generations, and at the same time set up a swinging arm on the grinding disc, so that the lens at the bottom can also get the friction of lateral swing at the same time when rotating, so that the original process shortcomings can be avoided and processing time can be saved. It's just that this high-precision smooth spherical surface stumped the blacksmiths, none of them knew what Mr. Jiang wanted such a big wine glass for, and even if it was used for drinking, the cup was already very round, so there was no need to be more round, right? Besides, the requirements for steel are extreme enough, and there are no ingots that can meet the requirements of various materials in the inventory! In the end, the blacksmiths had to pick up the sledgehammer and repeatedly forge it back to the era of steelmaking, and every time they made a sample, the gentleman, who was said to have been hired with a high salary, would take a bunch of strange rulers and measure them, and finally say that he would rework if he was unqualified. Not to mention that the ruler in his hand was also made by these blacksmiths, but they also couldn't guess what the use of these things was, and now they saw people taking their own products to find fault with another product, and then they suddenly realized that they generally knew the usefulness of those things, and now they like to use these new rulers to measure them when they make some things, so as to show how knowledgeable they are.

Time flies quickly, in a blink of an eye, Jiang Tian has been squatting in the workshop for more than ten days, these days, the originally thin and weak son has become unshaven, his hair bun has been spread out and dragged behind his head with a rope, the original Confucian shirt on his body has long been unknown where to put it, and now he is only wearing a cloth robe similar to a long gown, and the robe is also covered with various stains, looking like a Ming Dynasty version of a crazy doctor. Today he finally got the basic satisfaction of the spherical grinding disc, this set of grinding discs is the only qualified set in thousands of rework, divided into concave and convex two, limited by the trial production conditions, the diameter of the spherical is not very large, which determines that they can not make large lenses in the wide-angle test field for the time being, but even so can be said to be the most accurate abrasive in this time and space.

Jiang Tian installed a grinding disc with his own hands, and then selected a basic shaped lens from the blank to fix it on the base, because it already has a certain arc, so he did not choose coarse abrasives, but directly used the finest garnet powder, these abrasives have been screened many times to ensure that there are no excessive particles, then mixed with water and applied to the lenses, and then the engine qì, two young workers each shake a crank, driving the gear made of hardwood to rotate, Then one sees the swing arm swinging back and forth on the rotating lens, and the grinding begins.

After a day of careful grinding, a rough lens with an accuracy exceeding the existing detection methods was presented in front of people's eyes, Jiang Tian looked at this blank and let out a sigh of relief, and then handed it to Song Yi, whose eyes were shining: "Polish......

In order to obtain this qualified lens, he saw the entire development process, all kinds of whimsical ideas and strict requirements for the process are beyond the similarity, he knows that the finished product will be the best telescope in the world after it is made, originally he suspected that Jiang Tian was just a vain or perfunctory responsibility, and now he understands that the reason why people are unwilling to participate in the development is just because he is afraid of seeing his own clumsy craftsmanship, When I recalled listening to Jiang Tian explain the various complex formulas in mathematics, I still couldn't figure out the meaning of these formulas, and when I really wanted to do it myself, I realized that the new knowledge I was proud of was useless at all, just grinding a lens, it could be so daunting.

Jiang Tian didn't have as much emotion as him, he now felt that in this time and space there was a time and space to support a traveling emperor, and it took a lot of effort to develop a telescope of average quality, and he almost rebuilt the most basic processing system without any measuring tools, involving metallurgy, machinery, power, measurement and other aspects, many designs beyond this era were applied, I really don't know how the traveling powers in some novels built a scientific and technological empire in a poor and blank situation? Let's just say that the original caliper in my hand, there is no accurate scale on it, I just used a pen to draw some scales, not accurate at all, every time I measure, I have to carefully stare at the scale mark with the naked eye, and then look at the miserable grinder, even if it is a school teaching aid in the future generation, it is more advanced than this, right?

The polished lenses were handed over to the coppersmiths, who were like the high-level fitters of later generations, and if you told them what they wanted, they could conjure things up without a blueprint, not to mention that they also got complete drawings, so it didn't take a day for a standard Galilean binoculars to be on the desk. Song Yi looked at this undecorated industrial sample and almost cried excitedly, I heard that Liu Baokai and Tian Xuhai, who had successfully developed it, also came to join in the fun, they stood on the roof and took turns to pick it up and look at the fields in the distance, the scenery that had never appeared before was presented in front of them, and the peasants who were one or two miles away were clearly visible, the pervert originally heard that the new grinding method was inspired by his own stroking action, and he was a little embarrassed at first, but now he couldn't wait to announce it loudly to everyone, This artifact of war was created by a pervert. As for Tian Xuhai, he is still in a complicated mood and is indescribable, in fact, he hopes more than anyone that Jiang Tian can fail, so as to prove that this bombastic kid has no real talent and learning, but he was disappointed again and again, watching others gradually break out of his own fame, if such a person is reused by the court, wouldn't he soar to the sky? The civil and military princes of the Manchu Dynasty, do they all have to look at this person's face as an official? If this is the case, who else listens to the words of the saints?

As for Jiang Tian now, his task has been successfully completed, and five hundred taels of snowflake silver have also been obtained in his hand, so after a night's restful sleep, he picked up his pen and drew other sketches, which are the structural sketches of the other two telescopes, he believes that with this period of training, Song Yi can fully understand, as for why he did this, his reason is very simple, that is, to earn another thousand taels of silver.

Looking at the drawings, Song Yi didn't speak, just shook his head regretfully. Liu Pervert has also been in the workshop for the past few days, so he understands why he regrets: "Brother Muhua, it's not that we are stingy, it's just that there is no Xiyi glass for the sake of making mirrors. ”

Jiang Tian was stunned for a moment when he heard this: "The outer courtyard is casting glass, isn't there even a piece of usable?" ”

Song Yi didn't talk nonsense, took Jiang Tian's hand and walked outside, and then pointed to a basket of waste products and said: "Brother Jiang, look, it's really not a secret, the glass is made a lot, but it will be broken when you touch it, and it will crack when you grind, how to make it?" ”

Jiang Tian picked up a piece of waste material at random, and broke it with a slight break, as if the glass had always wanted to crack by itself, but it lacked an external force, and it broke off by itself with a little help...... Wait, I think I heard this phenomenon when I was in school, what is it called...... Oh yes, it's called internal stress!