"This method can be tried, since there are ancient records, there must still be some protection, but this kind of raw material is really unseen and unheard of. Pen, fun, pavilion www. biquge。 Although I don't dare to say that I know the achievements of all the alchemists on the mainland, I have definitely never seen such a thing in the south back then. ”

In fact, Old Jack still takes care of Allen's face when he says this, you must know that Old Jack still has a very high status among alchemists back then, and there is almost nothing he doesn't know, if Old Jack didn't think that this recipe was seen from the ancient books collected by the Holy See, he would have already decided that Allen was talking nonsense.

Alan naturally heard the trace of doubt in Old Jack's words, not that he suspected that Alan had lied to him, but more that he doubted whether Alan had misremembered, which actually meant to let Alan show him the original text.

But where did Alan find such a non-existent book now, so he had to pretend that he didn't understand, and tried to rummage through the few chemical knowledge in his head, so that a liberal arts student could recall this knowledge after four years of college, which was really a terrible thing.

Ammonia, which is abundant in proteins, hey, so the corpse is rotting, no, no, the organic chemistry is even more messy, and it definitely won't work.

And these things seem to be more likely to produce biogas when they are put together, so thinking about it, Alan hurriedly dispelled this idea, biogas is a good thing, but it is also very dangerous, people like him who have no theoretical experience at all, or don't think about changing people's lives with this thing.

Allen's white and delicate earlobes were about to be crumpled by him, and even Old Jack couldn't bear to see it, and said:

"In that case, let's experiment slowly, and we can find it eventually. ”

It's strange to be able to find it.

Alan muttered to himself in his heart, this kind of element, which only exists in the form of compounds in nature, can be tested by experiments, then it is called a ghost.

At this time, Alan suddenly recalled an article he had seen about the method of extracting ammonia from human urine, although it felt disgusting, but it was the only method that could be tried at present.

"Ah, I remember, there is a special method for making this called 'ammonia' in the texts. ”

"Really, let's hear it. ”

Seeing that Old Jack was a little excited, Alan was a little embarrassed, and even lowered his voice a little unconsciously.

"Well, that's disgusting. ”

"What's the matter with being disgusting, you just say it. ”

Only then did Alan remember that people were still using dung to make nitrate, and for these alchemists, as long as it was something useful, they didn't care how disgusting the process was.

However, the difficulty of collecting urine is not small, and the efficiency of this method is not very high, fortunately, Alan does not want to purify ammonia on a large scale, as long as it is enough for the production and use of mirrors, and even Alan does not want to expand the production of mirrors too much, only to ensure its rarity, can it be sold at a good price.

So Allen told Old Jack about the method of human urine to ammonia, this method is not very difficult, the main principle is to make ammonia from urea in the urine, and add lime distillation after fermentation, so that the mixture of ammonia and water vapor is obtained, but anyway, what Allen needs is ammonia, and there is no need to purify it.

"This ......"

Old Jack pondered for a moment, he was stunned when he heard this method of preparation, Old Jack didn't understand how those alchemists in the previous era found such a thing, but this did not prevent Old Jack from going down.

"Okay, but the raw material problem ......"

"You can rest assured, we will help you solve the raw material problem, you can do other research in your spare time, and just tell the people here if you need anything." ”

There is another bedroom on this side of the workshop, which was originally prepared for himself by Weiss, who is afraid that he will not have time to return to school sometimes, but due to the impersonal requirements of the school, Weiss himself has not lived here once, and now he can live temporarily for Old Jack.

Alan beckoned Vis over and asked him to take Old Jack to the bedroom, although it was just a simple place to rest temporarily, but it was also prepared by Vis for himself, so it didn't look shabby at all.

It's not a big place, but the priceless bed and the precious goose down quilt on the bed show how special this bedroom is.

Even so, Weiss turned back to Old Jack and said:

"Sorry, it's a little basic, you'll stay for a few days, and I'll have a safe place for you soon. ”

"No need. Old Jack waved his hand again and again, rejected Ves's kindness, and said, "It's good here, it's closer to the lab, I'm satisfied." ”

Weiss always felt that it was a bit of a joke to let a famous alchemist live here, and he wanted to say something more, but was stopped by Allen. Alan understood that for Old Jack at this time, it was more important than anything to be able to continue the study of alchemy, and he didn't care about these details at all.

"Then you can stay here, I will have someone prepare the raw materials for you, if there is nothing to do, then we will leave first." ”

Seeing that Old Jack didn't mean to keep them, Alan pulled Vis out of the workshop, and told Vis everything he needed on the way, without any surprises, which caused Vess's strong dissatisfaction.

"What? pee, why such a disgusting thing, and how am I going to collect it? ”

"Ahem, that's what you have to think about, anyway, there are so many people under your command, it's better to leave it to them. ”

Alan easily threw things on Ves, and then began a journey that Alan had been looking forward to for a long time, and Alan didn't want to worry about anything else.

Weiss was still very dissatisfied, but after listening to Allen's suggestion, he suddenly became enlightened, and hurriedly called a person in charge of the factory, and after handing over all the things to this subordinate, he chased Alan into the carriage and returned to the school, leaving only the person in charge with a confused face to look at the carriage in the distance, wanting to cry without tears.

"Okay, that's done, what are we going to do next. ”

Alan naturally understood why Vess's change was so big in just a moment, so he could only mourn for Vess's poor subordinate for a moment in his heart, and then looked at Vis with an expectant face.

"What are you doing, of course it's back to school, have you forgotten what day tomorrow is. ”

"Tomorrow, tomorrow, is there anything important, haven't heard of it. ”

Alan rolled his eyes, very helpless in his heart,

"Let's have a snack, tomorrow is the final exam. ”