With no minable nitrate ore and no chemical system, Iger can only rely on the forces of nature to provide him with the nitrate he needs. He had heard of the so-called indigenous nitrate making for a long time, but unfortunately, as a technology that had nothing to do with his profession or interests, and had long since been obsolete, Iger had never understood the detailed process of its process.

Fortunately, he probably knows the principle.

The fluffy "snowflakes" that precipitate from the corners of toilets, pig pens and stables are natural nitrate, which comes from the decomposition and nitrification of organic matter by bacteria...... Isn't the selective and focused reproduction of this process in the reaction tank the source of the concept of soil nitrate production?

Everyone understands the truth, but he didn't have the time and energy to do it himself through experiments to get a method of making nitrate suitable for the world of ice and fire.

It would be a dream to skip the basics and let people in this world who don't even have the concept of chemical elements and microorganisms understand concepts such as nitrates, ammoniating bacteria and nitrifying bacteria, but people who drive cars don't necessarily need to know how to build engines.

In his own guideline, Iger likens nitrate making to winemaking – making wine requires fermentation and grain, while nitrate making ...... The bacteria needed in the soil dug up from the corners of the walls where fluffy snowflakes can be precipitated are called "nitrate", and feces and urine are the raw materials that play the role of food. Next, we only need to find and summarize the most suitable production plan and reaction environment for the actual industrial park through comparative experiments, so as to realize large-scale soil nitrate production in the world of ice and fire.

Cobain is working in this semi-open-air workshop to find the best process and environment for nitrate production.

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"This is the first area, where the project started, where different raw materials are fed into different fields: all kinds of livestock and human waste, which are compared with each other. Unable to stand the smell of the proving ground, Melisandre decided early on to return to the Blackwall Fort to find a place to rest, while Cobain led the group into the gate and began to introduce the surroundings in detail. Considering the stability and availability of raw materials, we tend to use human waste. ”

After Cobain finished speaking, Nina also explained from the side in a timely manner: "Don't mention the king's farewell, there are enough people." The toilets in the industrial park have been established for a long time, and we have also developed the habit of using the toilets through a series of incentives and punishments...... As for King's Landing, we have already started communicating with Prime Minister Davos. It doesn't take much, as long as we can get permission to build toilets in flea nests and civilian areas, and let the garrison cooperate with us to guide the residents to use them, the raw materials will be more than enough. ”

"Good. Iger nodded. said yes, but a faint worry appeared in my heart: Daenerys occupied Dragonstone Island to force King's Landing, and the capital of the Seven Kingdoms is now under martial law every day, what kind of toilet to build at this juncture...... And let the garrison not defend the city to cooperate with the inhabitants to use it? I'm afraid it's not a loss of mind.

This is a problem on the surface, everyone can think of it, but no one has raised it to lower their morale, Cobain led everyone to continue to move forward: "This is the second area, and the test is the suitable environment required for 'nitrate' to act on feces and urine. After a period of comparison, we came to several conclusions: firstly, nitrate production is more efficient in non-open conditions, and secondly, unlike winemaking, manure and urine fermentation cannot be carried out in a sealed environment, and there must be some ventilation - this is not difficult, the problem is that ventilation conflicts with heat preservation: after some testing, we basically determined that the temperature that can make people feel comfortable can also make the nitrate ferment play its maximum effect. However, the season has reached winter, and the temperature is now near freezing, and in order to maintain the right temperature, a more confined environment is needed, and a confined environment contradicts the need for ventilation, and we are now trying to strike a balance between the two to make the production environment optimal. ”

Basically calculated the influencing factors he had mentioned, Iger nodded, there is no way about the temperature, winter is coming, and at present, Westeros can meet the natural temperature required for nitrate production is only the southern coast of Dorne, but it is impossible to consider it so far away......

"Consider setting up a greenhouse in the direction of the vent connection, and manually preheat the incoming air and control the blast speed to ensure the temperature environment and provide fresh air. But is it too vague to be able to control the temperature more precisely. ”

No one answered, including the vice president, who was leading everyone around the test site, and everyone didn't understand what Iger was talking about. Cobain's use of the phrase 'comfortable temperature' is already quite accurate and rigorous in this era. Ordinary people use words like "cold", "hot", and "lukewarm" to express their feelings about the temperature - you know: in Westeros, even the natural phenomenon of winter requires the school city to release a white letter crow to announce it.

......

After a few seconds, Cobain cautiously asked, "Then may I ask my lord, how can we grasp the temperature more accurately?"

There is no thermometer in this world!Iger patted his head, he didn't need to know the temperature accurately in his daily life, and the high temperature of hundreds or thousands of degrees when he smelted metal in Houguanzhen could not be measured by simple thermal expansion and contraction, so he didn't realize it until today.

"Let the glasswork shop try to make some thin tubes, with a hollow ball attached to one end, and fill it with some colored liquid, without water, which will freeze. By using the principle that the liquid level in the thin tube rises and falls due to the thermal expansion and contraction of air, the temperature can be measured more accurately. "By marking a scale on it and using the freezing and boiling temperatures of water as the standard points for high and low extremes, you can calibrate thermometers of different thicknesses and sizes...... Hanging in the nitrate production field, you can achieve the goal of mastering the accurate temperature of suitable nitrate production. ”

He spoke lightly, but there were few people around him who could understand him. Everyone looks at me, I look at you, and they are all at a loss: for them who don't even know about thermal expansion and contraction, it is really embarrassing to accept the design concept of thermometers.

But Cobain understood.

So it can still be like this!

The expulsion of the former bachelor was in his heart at this moment, and ordinary people could not understand it at all: he was the only one of the four deans of the first and third deputy of the research institute who had never seen Egger before, and he had always felt uncomfortable with the brainless atmosphere of the research institute that had no rational temperament at all, and who had blown the legendary chief logistics officer and now the commander-in-chief of the night watch. But at this moment, he suddenly understood why his colleagues were so mythologizing the man in black in front of him.

If what Iger saw a few months ago about the "guidelines" that compared nitrate making to brewing only made Cobain slightly recognize the wisdom of his top boss, today's conversation made him fully realize that the rumors were true. But what struck him the most was not that Iger could think of a solution to a problem and propose a new invention in between breaths, but that he said that before and after the big call, he said that the so-called "thermal expansion and contraction" and the temperature measurement device designed based on this principle were not thought up on the spur of the moment, but were originally within his knowledge system, and he needed to take a turn of time and thought to come up with it in an instant.

How much knowledge and understanding of nature does this require?

Isn't that...... Is it advanced knowledge from the mysterious country across the Sunset Sea? Coben was so itchy that he couldn't wait to drag Egg back to his room on the spot, tie him up and put him in a cage, torture all the knowledge in his mind, and solve a lot of difficult questions that had been accumulated in his heart for a long time.

Of course, this is just a matter of thinking, the identity gap is there, and Cobain has gained professional dignity and a sense of accomplishment in the Night Watch Industrial Research Institute, and has realized his own value...... And these things are hard to buy. He still wants to continue to mess around, even if he has the ability, he won't really mess around.

Iger was completely unaware that his casual remarks would make huge waves in the hearts of the listeners, he was used to the situation that "a casual point of guidance can make the technology tree of this world grow a little taller", the night watch industry is his own belongings, he can't hide his secrets or tricks here, and it is really this state of mind that visits and guidance again and again, and also makes him enjoy a high reputation among the technical personnel in the industry - the large circle of people around him, in addition to the management who has to accompany him, there are many golden ideas waiting for him to come up casually.

Seeing that everyone was blindfolded, he shrugged: "That's it, I'll go back and draw a schematic diagram for you, skip this topic, next district?"

He was the head, and when he said the next district, he would go next, and everyone temporarily put their doubts behind them, and rushed to the last part.

"After the fermentation of the nitrate, it is the last step. "We are testing how long it takes for fermentation to transform all the raw materials, and the current conclusion is about a month, which should be further shortened." After the fermentation of the nitrate soil is collected, put in a pot of boiling water and boiled, take out the upper juice, filter the clear liquid obtained several times, and then add plant ash according to the adult's suggestion to precipitate, and finally the water is basically only the nitrate and useless salt we want. "But at this time, if you directly evaporate and dry, there is too much useless salt in the matter, and we are now looking for ways to extract the nitrate separately or remove the impurities." ”

"Different substances have different solubility in water, and the solubility of the same substance can vary dramatically at different temperatures, and we may be able to find a way to take advantage of this. Egger has basically returned the knowledge of chemistry to the teacher, but the main points of this general class are something that he can't forget, "At this point, you can discuss and study with the assistants of the Alchemists Guild who are still left in King's Landing, they often have to dissolve this and extract that in making wildfire, maybe they can provide some help." ”

In the real world, Egger mentions just ordinary recrystallization operations, and the pyromancers of this world have even mastered some of the essence, but these operations are internal secrets of the Alchemists' Guild to them. Yes, and willing to explain the principle in such a concise and direct way, probably only Iger can do it, and this is another unheard of new harvest for Coben, who became a monk halfway through and began to set foot in the field of chemistry...... He silently wrote down the concept of "solubility", and it suddenly dawned on him, and he vaguely thought of a solution.

"Why is there no one here?" Egger found something wrong at this time, in the final process area of boiling nitrate, large and small pots and pans are piled together, and the place where the fire should be in full swing is in full swing, but there are no workers in the desert, "Has saltpeter begun to produce production, and how much inventory does the industrial park have now?"

"This is the nitrate production experimental area. Nina hastened to explain, "But you instructed us in your last letter that the arrival of strange spirits is imminent, and the land grant is in urgent need of a supply of nitrate, so we should prioritize the collection of ready-made nitrate in our operations, and the continuous production of nitrate can be slowed down." ”

Iger did write such a letter: "Hmm...... But it's not for you to stop. ”

"It's not that it's stopped, but the nitrate making process has not yet been perfected, and every time the improvement plan is made, it will take at least ten days to see the effect, and we can't let a large number of workers wait here." The people who boiled the nitrate were all in another boiling field not far away, and they were rushing to work day and night. ”

"You haven't even completely completed the fermentation step, where can you get so much nitrate, and you have to set up another site - work day and night?"

Nina pointed to Cobain, "This brings us to the accidental discovery of the Institute." Your Excellency, you tell us in the syllabus that the soil dug under the corner of the wall where nitrate grows can be used as 'nitrate fermentation' for nitrate production...... However, in the boring time of waiting for the fermentation results, Vice President Koben tried casually, but found that there was no need for a series of complex processes of adding manure and urine, fermentation, and reaction in the middle, and the soil dug from the corner of the wall could extract nitrate by itself. ”

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