Song Beiyun bit the pen with dark circles under his eyes, and the books in front of him were already densely packed with notes on his experience, although this problem of writing things in books was always criticized by Yusheng, but his bad habit was difficult to change, and after a long time, he would no longer talk about him.

Yu Sheng next to him was not so comfortable, his hair was messy, his side was full of volumes and classics from all sides, the whole person seemed to grow in a pile of books, and the whole person was sluggish.

"Brother Yusheng, you can't sleep, and there are three sets of rolls." Song Beiyun pinched up a piece of muffin made by Aunt Hong and put it in his mouth: "It's still early in the morning, why are you drowsy?" Do you still want to study? ”

Aunt Hong on the side looked distressed, she frowned and stepped forward and put two large bowls of rice soup in front of Yusheng and Song Beiyun respectively: "If you work hard, don't think about it, it's okay to rest for a while." ”

"Mother......" Yusheng raised his head and said with a haggard face: "Beiyun is right, if I fall off the list again, how can I be worthy of my father's dying entrustment." You don't have to worry about me, go to the spring fair with Qiaoqiao. ”

Song Beiyun took a sip of rice soup: "In the afternoon, let's start reciting poems." Summarizing the poems of these years, each word card reverses three poems, each poem title has three poems in five words, three poems in seven words, three quatrains, and three rhythmic poems. I did the math, there are about 660 poems in Moji, and you can gnaw on this bone, and you have to gnaw if you can't. ”

As soon as he heard this amount, Yusheng's whole person collapsed, and Aunt Hong opened her mouth but she couldn't say anything, so she could only sigh silently and walk downstairs with the basket.

After going down, it happened that Ah Qiao was cleaning up the wild ferns picked in the morning, and when she saw Aunt Hong coming down, she raised her head and asked, "Aunt Hong, I'll leave after I'm done washing." ”

Aunt Hong nodded and sighed silently: "Ah Qiao, you should persuade you, those two are like demons......

"Aunt Hong......" Ah Qiao picked off the old stems of the bracken, put it in the basket, raised her head and said to Aunt Hong: "You can blame Brother Yusheng and Beiyun for this, this reading book should be so bitter, if you can't even bear these hardships, then what kind of book do you read, it is better to work in the field early." ”

"Reason is this reason, it is ......"

"Aunt Hong, don't say this, why bother to displease Brother Yusheng. Go to the spring fair early and buy them some delicious food to make up for it. At that time, our Xiaolianzhuang will have two champions together, so the person who proposed to Brother Yusheng must not step through the threshold? ”

"Silly girl, there can only be one champion." Aunt Hong touched Ah Qiao's head lovingly: "Then who do you want to be the champion?" ”

"Brother Yusheng, it's good for Brother Yusheng to be the champion."

"What about Kitunome?"

"That guy is very good at studying, and he still hopes to be admitted to the top prize? Anyway, there can only be one champion, so it's better to let Brother Yusheng go. ”

"Silly girl, no wonder Beiyun loves you so much, you are really my aunt's heart." Aunt Hong squatted down and rubbed Ah Qiao's face: "Hurry up and clean up, otherwise there will be more people later." ”

Qingming Festival at this node is not all the festival of worshiping ancestors, Qingming is just a solar term, the real festival is the previous cold food festival, this is a day for men and women to gather in spring, the people have a market to visit, rich families go to the suburbs for a spring picnic, men, women and children eat the cold food, in order to welcome the spring, look forward to the harvest.

There has always been a saying that after the cold food, the clouds and rain disappear, and the flowers and branches return to the green.

It did rain last night, but this morning it was a fine day, as if the haze of the whole winter had been swept away, and most of the peasant children would follow their father up the mountain in search of bamboo shoots, ferns and mushrooms.

"When we get to the market, let's go buy some spring shoots." Aunt Hong said, then glanced at the bacon and cured chicken on the beams of the house, and she pondered for a while: "Get them a salty steamed bamboo shoots in the evening." ”

"Well, okay, I'm here." Ah Qiao hung the washed bracken basket on the rope in the cloister, and wiped her hand on the apron: "I'll go change my shoes." ”

At this moment, Song Beiyun was lying at the window watching them walk out of the door, turned around and smiled at Yusheng: "Brother Yusheng, Aunt Hong and Qiaoqiao went to buy bamboo shoots, and they will have a good time at night." ”

Yusheng raised his head silently and sighed softly: "I don't have an appetite......"

"You don't understand this, the bamboo shoots in this spring are the most tender, but they can be eaten by heartburn, but if you take rice noodles like this and add the fat and thin bacon, and then put a cured chicken on the pot and steam it together. This meat oil seeps down, the rice noodles absorb the oil, the bamboo shoots also absorb the oil, and the meat is also stained with the water vapor of the bamboo shoots, which is neither soft nor hard, a mouthful of bacon and a mouthful of bamboo shoots and then a mouthful of rice, that taste, tsk......" Song Beiyun wiped his mouth: "Greedy." ”

"Let's study, don't be a lazy and greedy thing." Yusheng also swallowed his saliva: "Hurry up and read the book." ”

"Read books, read books."

Song Beiyun said, but where was he willing to read honestly, and within two minutes, he suddenly sat up straight: "Oh, by the way, my master ordered me to sweep the ancestral tablet at the Qingming Festival, I forgot!" ”

Yusheng raised his head and said dissatisfiedly: "Why do you always lose everything, this is a big deal, go quickly!" ”

"Order!"

Song Beiyun jumped and ran, like a monkey. However, where did he go to worship his ancestors, he turned his head and went into a small forest five or six hundred meters away from Zhuangzi, and there was a canopy in it, which was his secret base.

He touched the calciner he had gotten from Zuo Rou and found that the temperature had almost cooled, then he took out a damp cloth and wrapped his whole head, put a glove made of sheep casing on his hand, and took out a simple goggle from his bosom that he had polished out of crystal, and when all the protection was ready, he sat next to him and looked at a jar.

"Success...... It's going to work! ”

He slowly and carefully opened the jar, revealing a yellow-brown viscous liquid, he didn't even dare to gasp, just used a bamboo skewer to poke in, after standing for a while, he took out the bamboo skewer, found that the part soaked in the liquid had been carbonized, he carefully put the bamboo skewer in the hearth and lit it off, and then sat on the ground, looking at the jar and laughing.

"Concentrated sulfuric acid, get!"

This distillation and calciner is really easy to use, and the sealing is fantastic! It is the best process he has seen since this era, although there is no corrosion-resistant rubber, but that layer of soft paint actually has a substitution effect, although it is more expensive than rubber and easy to consume, but it is better than nothing!

The dilute sulfuric acid made from bile alum and caustic soda was distilled overnight, and although the quality of this half jar of viscous concentrated sulfuric acid was very average, it was very, very remarkable to be able to get this in this era.

After the essential oil is prepared, the oil from the leaching solution is left, and the oil is esterified with the by-product of salicylic acid to obtain glycerin.

After having concentrated sulfuric acid, nitric acid can be obtained through the saltpeter of the Western Regions purchased from the black Turkic merchants, that is, sodium saltpeter of average purity, and then distilled with dilute nitric acid and concentrated sulfuric acid to obtain concentrated nitric acid.

So now if Song Beiyun is talking about a huge technology tree in front of him, the bottom two options have been activated, first of all, he can now prepare two branch lines of things through glycerin, nitric acid, and sulfuric acid, first of all, chemical fertilizer.

Chemical fertilizer is one of the greatest inventions in human history, chemical fertilizer is one of the important conditions for human beings to get rid of hunger, by fertilizing the land and greenhouses, Song Beiyun can begin to carry out plant domestication, then after plant domestication is the screening of high-yield varieties and drought-tolerant, waterlogging-tolerant and disease-resistant species, followed by large-scale planting and two-season grain and vegetable cultivation in the southern region.

Maybe there is no meat, everyone is unhappy, but as long as there is food and vegetables, no one will starve!

And what is the other branch? Most people can understand what these three things are made at a 1:1:7 scale.

Yes, nitroglycerin.

If chemical fertilizer is one of the things that most people live, then its brother nitroglycerin is one of the things that kills the most.

Nitroglycerin, together with the diatom mud from the previous toss of algae and the sodium raw material left over from the preparation of sulfuric acid, can make one of the most notorious gunpowder in ancient and modern history - yellow gunpowder.

And its other thunderous name is TNT.

"Long live chemistry! Chemistry! Banzai!!! Song Beiyun sat on the ground and danced like crazy: "Lao Tzu's small step is a big step for mankind!" ”

After calming down a little, Song Beiyun sat on the ground and began to think about the future in his mind...... Maybe hundreds of years, maybe it's a thousand years later, people sit in a certain auditorium, and then the host stands on it, takes out an envelope, and reads in a short and sonorous tone, "The one hundred and forty-seventh Song Beiyun Prize in Chemistry is ...... winner"

"Mom! This is so happy! Song Beiyun hugged the tree and shook it back and forth: "No, no, no, it's too fast, it's too fast......"

After really calming down, he knew that he really only took a small step, and it took almost five years to really get concentrated sulfuric acid, so the progress was not good! It's still really getting started, and there's still a long way to go.

After forcibly sedating, Song Beiyun squatted on the ground and stared at the jar of concentrated sulfuric acid, then squinted his eyes and made a very difficult choice.

TNT and fertilizer, start researching at the same time!

Hurriedly hid the equipment, and then sealed the jar of concentrated sulfuric acid with a porcelain plate and wet red mud and carried it back to his room, he took off his simple protective clothing and returned to the place where he was studying.

But at this moment, there is nothing else in his mind, full of hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon.

"Plating, yes, yes...... Wind power generation, electroplating technology. With electroplating, it was possible to make acidified batteries, which could be lit 800 years in advance, and then ...... Yes, yes, purification technology, rubber ...... Lao Tzu wants rubber. ”

"Bananas?" Yusheng turned his head: "Want to eat bananas?" ”

Song Beiyun smiled: "It's okay, it's okay...... Brother Yusheng, I'm so happy!! ”

Yusheng scratched his head and looked at this strange guy with a puzzled expression, completely unaware of why he was happy.