Wang Rong put on his clothes and armor under Wang Mao's service, and went out of the camp accompanied by Wang Hao, only to see that the work outside was in full swing.

Wang Mo hesitated for a moment, and then said: "Du Wei, although the Hou Ye agreed, he took a stone crossbow. ”

Wang Rong nodded, indicating that he knew, since he had a request for others, he had to be prepared for the other party's conditions.

What Wang Rong wants to do most now is to make the gunpowder in the dream while his memory is still there. Since this gunpowder can influence the world for thousands of years and eventually become the mainstream of weapons, it shows that it is very lethal.

Sulfur is a fire in the army, in order to better ignite the honeycomb stone, the honeycomb pores are smeared with sulfur powder, with a fire cloth strip lit and put in, you can ignite the honeycomb stone. Therefore, sulfur is one of the ingredients of gunpowder, and Wang Rong really has it.

Charcoal is even better, and there are ready-made charcoal on the ruins of the two high walls outside. It's just that this nitrate is a little troublesome, and in the entire Shuofang County, Wang Rong has never heard of where saltpeter is produced.

Wang Rong took Wang Mao to walk around the camp, and then he saw that on the wall of the specially built thatched house in the camp, there was a large piece of bulging white alkali, Wang Rong buckled a small piece of white alkali with his hand, crushed it with his fingers, stabilized it, and then tasted it with his tongue in Wang Hao's frightened eyes, slightly salty with a trace of bitterness.

Wang Mao couldn't understand his cousin's behavior at all, and he said cautiously: "Duwei, are you sick, or let Doctor Xiao Zhang show you?" ”

Wang Rong listened to Wang Hao's words and said angrily: "Go! Go! Go! Go aside! You're sick, why are you going so far? Come here, I have something to explain to you, you send a few people to various thatched houses to recycle this white alkali for me, and collect as much as you want. ”

Wang Mo looked aggrieved, but he still obeyed the order and sent a personal guard to work in the hut with shovels and wooden barrels.

Wang Rong looked at the work of the craftsmen again, and asked in detail if he didn't understand, which annoyed the craftsmen, but he felt respected in his heart. Wang Rong has learned a lot of knowledge and corrected many previous misconceptions.

Then Wang Rong came to the wounded soldiers, that is, the medical battalion. Here the Mushan fence is used as a boundary, enclosing a quarter of the area of the camp.

After Wang Rong entered, the first thing he saw was the busy figure. After carefully examining the injuries on one of the wounded soldiers, Zhang Pu wiped the sweat from his forehead, and when he looked up, he saw Wang Rong standing aside and looking at her.

"What's wrong?" Zhang Pu asked curiously.

Wang Rong handed a clean towel to Zhang Pu and asked, "Why are you back again?" After tossing all night, why didn't you have a good rest in the county guard's mansion? ”

Zhang Pu said helplessly: "I don't have time, it's good that the Bearded Man didn't attack today, otherwise I would really be too busy." ”

Wang Rong said with concern: "Pay attention to rest, take care of your body, don't get tired." Then he saw that there was a compartment in Zhang Pu's medicine box containing white powder, very similar to the soil nitrate that he had pulled off the wall of the thatched house.

Wang Rong curiously pointed to the white powder and asked, "What is this?" ”

Zhang Pu wiped his face and hands, glanced at the white powder, and said, "This is saltpeter powder." ”

Wang Rong was puzzled: "Can saltpeter also be used as medicine?" ”

Zhang Pu replied as a matter of course: "Of course, headaches, blow into the nose with saltpeter powder, and it will be cured; Bellyache. With saltpeter and realgar, one penny each, grind finely. A little bit in the eye socket and heals. At the beginning of the back, use saltpeter three taels, soak in one liter of boiled water, and then soak it in a thick towel soaked in water and wring it out on the affected area, and then change it when the towel is cold. ”

Wang Rong nodded, indicating that he understood, and then asked, "Then why are there so many left?" ”

Zhang Pu replied: "There are very few people who suffer from headaches and abdominal pain, and even fewer people suffer from dorsal gangrene. This saltpeter powder was originally a spare. ”

When Wang Rong heard this, he smiled, and he said to Zhang Pu: "Doctor Zhang, let's discuss, okay?" ”

Zhang Pu opened his good-looking apricot eyes and said, "You don't want this saltpeter powder, do you?" ”

Wang Rong smiled and nodded, and said, "That's true. ”

Zhang Pu crossed his waist with one hand and stretched out the other, and said, "Then what are you going to take in exchange?" ”

Wang Rong looked confused, and he said in disbelief: "Do you want to exchange? Didn't you hand over this grass and blood stoppers and bandages to you? What else do you want in exchange? Oh, by the way, I saved your life. ”

When Zhang Pu heard Wang Rong say this, he had no choice but to withdraw his hand and said, "Okay, saltpeter powder can be given to you, but you have to tell me what you want to use." ”

Wang Rong looked at Zhang Pu's curious eyes, and did not intend to say that he was going to test the manufacture of gunpowder. He hurriedly changed the subject: "Is there any saltpeter powder of this kind, if there is any, I want it, the more the better." ”

Zhang Pu nodded and promised: "Okay, I know, the amount of this saltpeter powder will not be very large, I will send it to you after I collect it." ”

Wang Rong said happily: "Thank you very much." After saying that, he quickly turned around and walked outside the wounded soldier with Wang Hao.

And Zhang Pu was thinking about where to get saltpeter powder, and how much saltpeter powder he could get. By the time she came back to her senses, Wang Rong had already left with her guards. Angry, she threw the towel into the copper basin on the wooden shelf, "Hmph, bad guy, I know you won't tell the truth." ”

Wang Wei followed behind Wang Wei with a puzzled expression, and asked angrily, "Duwei, what do you want so much saltpeter powder for?" Why can't you say it to Doctor Zhang? ”

Wang Rong turned around and said to Wang Yan word by word: "Next, I want to do a big thing, this matter is listed as top secret, and you and your personal guards will follow me." ”

The guards are all soldiers carefully selected and cultivated by Wang Rong, and they can fight on horseback, fight on foot, go up the mountain to penetrate the forest, and go down the river to be useful.

When Wang Rong returned to the tent, he saw several wooden barrels placed in the tent. Making gunpowder in his own Chinese military tent, Wang Rong was really afraid that if he was not careful, he would blow up his tent with his own people. He hadn't enjoyed life well yet, and he didn't want to be disabled or die young.

He said to the king, "Take these barrels out, and you will take the men and build a tent behind the big tent, and put the barrels there." ”

After some tossing, Wang Rong began to follow the procedure in his memory, first soak the ashes of the plants and trees in water, filter out the ashes, then soak the soil nitrate into it, then filter, and finally condense and crystallize.

The first thing to condense is snow-white table salt, and if the fine salt that is as white as snow is taken out, it will definitely make the whole world a sensation.

Because although there are many kinds of salt at this time, there are sea salt, well salt, alkali salt, pool salt, cliff salt, etc., but they all contain different degrees of impurities, even the best green salt, the impurities it contains are not small, all are coarse salt.

The fine salt made by Wang Rong is white and free of impurities, and it is the best salt. If you don't consider the origin of this fine salt, Wang Rong may eat it. But to put it bluntly, this fine salt extracted from urine will not be eaten by him.

Then what was precipitated was the fire nitrate, and when Wang Rong was refining the fire nitrate, he asked Wang Hao to lead people to collect a large amount of charcoal and take a large amount of sulfur.