Maybe the Taiping Army was really short of materials, and since Hong Xuanjiao agreed to those materials, Wang Feng fell into a long wait.

During this period, perhaps aware of the importance of the southeast direction, at the end of March, Luo Xuan was sent by Yang Xiuqing to lead the army to conquer Zhenjiang, and the next day, he crossed the river to take Yangzhou, and confronted the Jiangbei camp in Qishan.

At the same time, under the influence of the Taiping Rebellion, the Shanghai Xiaodao Society launched riots one after another, and gradually connected and grew, elected Liu Lichuan as the leader, and prepared to launch an uprising in the autumn, but accidentally revealed the news, so it had to be launched in advance, and occupied the county seat of Shanghai in one fell swoop, and reported to Hong Xiuquan on the night of the uprising, expressing his willingness to surrender, Yang Xiuqing then instructed Luo Outline to respond, but due to the siege of the camp in Jiangnan and Jiangbei, it was never possible.

And this qiē still has nothing to do with Wang Feng, he once asked for orders to attack Zhenjiang with Luo Dana, but Luo Xuan thought that his subordinates were all Qing army soldiers, low combat effectiveness, and unreliable in terms of ideology, so he didn't take him to play, Wang Feng had no choice but to wait patiently, until April 27, Hong Xuanjiao was late.

Although the male and female camp system is strictly enforced, it must also be divided according to people, such as Hong Xiuquan, Yang Xiuqing, Wei Changhui and others are not restricted, and Hong Xuanjiao, as Hong Xiuquan's sister-in-law, naturally has some privileges, she took a few female soldiers and drove three caravans directly to Wang Feng's camp.

"Sister Xuanjiao, I am looking forward to the stars, looking forward to the moon, and I am looking forward to you every day!" As soon as he saw Hong Xuanjiao, Wang Feng immediately stepped forward, and he was just about to hug a bear.

Hong Xuanjiao took a step back vigilantly, and said angrily: "You don't have a backache when you stand and talk, I warned you before, mercury and saltpeter are difficult to get, do you know how much effort I put in?" Alright, you go check it out and see if it's what you want. ”

"Hehe~~" Wang Feng smiled, climbed into the car to check one by one, and after a while, he got off the last car and said with a satisfied smile: "Sister Xuanjiao has worked hard, I have something to do now, and it is inconvenient to entertain you, please go back to several sisters." ”

"You" Hong Xuanjiao suddenly became angry, and snorted coldly: "Wang Feng, you wipe your mouth and drive people away when you are full of food and drink, you look too ugly, right?" No, what exactly are you going to do? I'll have to stay and see. ”

"This" Wang Feng was embarrassed: "Sister Xuanjiao, if you stay in my camp for too long, I'm afraid it's not very convenient, and you also know that the men's and women's camps are very strict." ”

"Huh~~" Hong Xuanjiao smiled disdainfully: "You don't look at what my identity is, except for the Heavenly King, who can control me." ”

Wang Feng didn't want Hong Xuanjiao to know her secret, so she looked at the female soldiers beside her and hesitated: "What I do is very important, it's not good for too many people to know." ”

As soon as these words came out, the faces of the female soldiers became unnatural, and Hong Xuanjiao was also pretty, and said dissatisfiedly: "Wang Feng, they all came out of Jintian with me, and they can definitely be trusted, without my instructions, they will never mention what they saw today to anyone, you don't have to worry, okay, you hurry up, don't mother-in-law." ”

Wang Feng was completely out of whack, so he could only beckon: "Lu Dayou, drive the car to the back, no one is allowed to approach without my permission!" ”

"Great!" Lu Dayou was also full of curiosity, and called a few soldiers to drive the caravan to the depths of the camp.

Synthetic thunder ~~ acid tribute, the prerequisite is nitric acid, although nitric acid has a variety of preparation methods, the simplest, is to directly distill saltpeter, but the concentration is enough to choke, with Wang Feng's current conditions, the best way is to replace nitric acid from nitrate with concentrated sulfuric acid, which also means that Wang Feng must first synthesize sulfuric acid!

Wang Feng led Hong Xuanjiao and several female soldiers to a brick cellar, which was different from the brick cellar where porcelain was burned dozens of zhang long, it was square, less than one zhang in length and width, in addition, there was a flue up and down, and the one on top led to a small pool.

Hong Xuanjiao couldn't help asking, "Wang Feng, what is this?" ”

Wang Feng said lightly: "It's called the combustion chamber, I'll explain it to you later." As he spoke, he turned his head and called: "Come on, take a part of the pyrite and put it on the upper layer, and put the diatomaceous earth in layers near the flue sieve hole, which should be even, not too tight, to ensure that the smoke passes through guò, and the bottom is cultivated and roasted with charcoal." ”

"Yes!" After the two soldiers were busy for a while, they arranged it according to Wang Feng's request and lit the fire again.

Through the vents, it can be seen that gradually, yellow-green smoke rises from the combustion chamber, and since the upper layer of combustion is almost airtight, the smoke can only overflow into the pool along the upper flue.

Everyone was full of puzzlement, Wang Feng looked at it, and said: "Roasting pyrite can produce sulfur dioxide, and diatomaceous earth contains nitric acid ~~ potassium, which can react with sulfur dioxide to generate sulfur trioxide, and then inject sulfur trioxide into water to produce sulfuric acid, this is just the beginning, the concentration is still very low, Sister Xuanjiao, you wait patiently for a while." ”

Hong Xuanjiao asked with a puzzled face, "Wang Feng, what are you talking about?" Why can't I understand a word? ”

Others also showed deep sympathy.

Wang Feng smiled strangely: "I will make up a book called "Chemistry" when I have time, and if you think it through, you will be able to understand what I am talking about." ”

"Humph! Pretending to be a ghost again! Hong Xuanjiao's chest rose and fell for a while, and she swallowed a sullen breath.

Wang Feng couldn't help but glance at it, and after licking his lips secretly, he continued to look at the combustion chamber.

After about an hour, wisps of thin gas began to emerge from the water surface, and the water became much thicker than before, which was obviously the concentration to the limit, which should be regarded as the level of oleum acid, so Wang Feng called to stop.

Immediately, a soldier extinguished the charcoal fire, but Lu Dayou touched his head and asked, "This is sulfuric acid?" Master Shuai, I think it's about the same as Qing Shui! As he spoke, he put his hand in.

"Stop, I don't want my hand anymore!" Wang Feng hurriedly shouted, and Lu Dayou was frightened and froze on the spot.

You know, if nothing else, this is concentrated sulfuric acid, put your hand into it, and Lu Dayou's hand will be scrapped.

"Lu Dayou, most of the chemical raw materials are dangerous goods, highly toxic, and strongly corrosive, just touch them randomly, don't blame Lao Tzu for not warning me in advance for missing arms and legs in the future!" Wang Feng smiled sadly.

"Yes, yes!" Lu Dayou even claimed that it was, and Wang Feng instructed: "You take a wooden spoon and scoop some sulfuric acid into a glass bottle, and then put saltpeter in it."

"Oh!" Lu Dayou carefully did as he was told, when the wooden spoon reached into the sulfuric acid pool and turned black, his head was sweating, and when the saltpeter was sprinkled with sulfuric acid, there was an incredible phenomenon, accompanied by bursts of bubbles gushing out, saltpeter was dissolving at a very fast speed, and at the bottom of the glass bottle, there was a layer of white solid gradually thickening.

The whole reaction lasted for a short time, and in a short time, the bottle was calm, and the liquid was still clear and transparent, except for the saltpeter that had turned into a white solid.

Everyone's faces were puzzled and incredulous, and Hong Xuanjiao's beautiful eyes scanned back and forth on Wang Feng's body.