Taking advantage of the presence of several new governors, Marin thought about it and planned to gather the four new governors and start a training course for governors to teach them some precautions. Of course, the main thing is to make them understand www.biquge.info the specific duty of the governors they have sent them.

For example, Albert went to the twin islands of North America in order to expand inland, and the means were more modest. Tara went to Havana, mainly to farm the land, and at the same time, to conquer the Taínos.

Gaurard's task was simpler, he was a contractor who went to Panama to cut down trees, plant grass (pyrethrum and wormwood), and build roads. In order to be able to open up the passage to the Pacific Ocean. Of course, he is the most dangerous, and if he suffers from yellow fever or something, he will not be saved.

As for Wiltz, his mission is also quite special, he went to Cuba to mine. Fortunately, the laterite nickel ore is red and very easy to explore. If it is a different color mine, it may not be so easy to find. And, Marin remembers, in the previous life, in the middle of the two lakes east of Moa, there was a large red mine. Therefore, Wiltz is also very easy to find laterite nickel ore. Chromium, another mine used to make stainless steel, is a bit tricky to find. Marin knew that there was a million-ton chromite near Moa, but he didn't know where. Fortunately, Wiltz is a prospecting engineer, so when the time comes, let him look for iron ore near Moa, find all the iron ore nearby, and then slowly determine which one is chromite......

Anyway, the iron ore found was directly restored with a simple blast furnace. The chromite is reduced to chromite alloy, also known as chromium steel, which is not easy to rust. Those that are prone to rust are definitely not ferrochrome. Then, the nickel extracted from the laterite nickel ore is mixed into ferrochrome and refined to obtain stainless steel. Although the chromium-nickel content is not well controlled, it is stainless steel. What I need is only to be able to replace the part of the waterline of the hull wrapped in copper, and it is not used to make any precision instruments. Therefore, the requirements for stainless steel are not so high, as long as the corrosion resistance is not worse than that of copper.

Although it is said that these four people can be trained individually, there is no need to take classes together. However, Marin believes that as a governor, one should have a wealth of experience and a good sense of the big picture. Therefore, when it came to one of the governors, the other three listened to it. Perhaps, they will need to use some of this knowledge in the future? After all, their current governorship is not for life, maybe working in this environment today, perhaps, tomorrow it will be a different environment. It's like Tara, who used to work on the twin islands and now goes to Havana......

……

Looking at the four people sitting below like elementary school students, Marin was very satisfied. If anyone is not serious about learning knowledge, Marin has to consider whether it is time to change people.

First, Marin wrote the phrase "Do not drink raw water" on the blackboard, and then let all four of them memorize it and resolutely implement it.

"But, Brother Marin, why is it forbidden to drink raw water?" Albert asked, puzzled.

"Albert, from the moment you sit here, you are a pre-governor, no longer a child. So, you have to follow the rules, and at work you should call me Lord Duke, not brother!" Only in private can you call me brother! Do you understand? Marin reprimanded harshly.

"Oh......" Albert replied aggrievedly.

"Albert, you're about to become the governor of the governing side now. Therefore, the first common sense I will teach you today is to distinguish between public and private. This Governor's Training Course is obviously an official occasion, not a private occasion, which is why I asked you to change your name, do you understand? As a governor, the first thing to do is to distinguish between public and private! Tell me, do you understand? ”

"Understood!" Albert stood up and replied in a firm loud voice.

"Very well, that's how it should be."

"So, let me explain to you why you can't drink raw water......

Then, Marin explained in detail what microorganisms are, and how some harmful microorganisms can cause people to get sick after entering the human body...... It's a pity that after finishing speaking, the four of them all looked confused......

Obviously, they don't have an intuitive understanding of microorganisms. Unfortunately, Marlin doesn't have a microscope in his hand right now, so he can't show them the presence of microbes.

Finally, Marin became angry and said loudly:

"Anyway, you just need to know that drinking raw water will make you sick. Especially in the tropics, it's easy to get the plague! ”

"The plague?" All four were taken aback. Although they don't understand what a microbes are, they still understand what a plague is. So, the frightened four people nodded one after another.

"Also, if there is a plague or contagion somewhere, it means that there may be something wrong with the water source there. At this time, the best way is to dig a well and drink the water. Of course, you have to boil it and drink it. ”

"So, Lord Duke, is it okay to drink cold and boil?" Wiltz asked weakly.

"Cool boiled water is also boiled boiling water, no problem. However, it should not be cold for too long. Otherwise, microorganisms will still invade. In other words, boiling water cools down for a short time, and it will definitely be okay to drink it. After a long time, it definitely won't work. ”

The four of them nodded their heads one after another, and the First Principle of the Colony finally left a deep impression on the hearts of the four.

Marin then began to tutor Albert, the tallest of the four, while the other three sat in on the sidelines:

"North America...... Abu is a group of Indians from the Northern Wilderness Continent, some of whom are milder, such as the Drava people, and the Wampanoag people that Tara has just contacted. However, most Indians were more belligerent. Because they often hunt in the dense jungles of the Northern Barbarian Continent, they have developed a fighting ability to fight with nature. ”

"Of course, fighting them openly is not terrible. The most terrifying thing is that those Indians hide in the dense jungle and let cold arrows sneak up on you. That's why I'm letting you win over the Dravares. Because, the Drava people are familiar with the forest and are not afraid of the bow and arrow raids of other Indians. ”

"When the time comes, you will employ those who are proficient in archery among the Dravaare and Wampanoag, and replace them with fine bows and arrows of European origin, and you will surely be able to suppress the native Indian bows......"

Albert nodded again and again, with a look of admiration. Using the Indian jungle veteran to deal with the hostile jungle veteran, and suppressing it with special weapons and equipment, there is definitely a chance of winning.

"In addition, you have to hire friendly Indian tribes and cut down trees desperately, and cut down all the trees, and those native Indians who are good at jungle warfare will not be worth mentioning, as long as the cavalry makes a simple charge, they will win."

"How many troops will you send me?"

"You just go now, don't think about fighting, first find a way to get on good terms with the Delaware, and buy Manhattan Island as a foothold. At the same time, oak logs were purchased on a large scale. Fighting, it is estimated that it will have to wait. Plus, I'm going to pick up some of the best plate infantry for you. Besides, you are the governor, and the war has nothing to do with you. ”

"Okay......"

……

Next, Marin pointed out Wiltz:

"This place you're going to has a very valuable mineral deposit called nickel...... Uh, I don't know what nickel is? No problem, I'll tell you......"

Barabala's nickel talk for a long time, and after Wiltz was almost faint, Marin stopped.

"Anyway, to the southeast of Moa, between the two lakes, there is a laterite area......" said Marin, drawing the approximate location of the two lakes.

"After finding the laterite area, dig out the laterite and set up a furnace to calcinate it at high temperature and air...... At this time, irritating gases escape. When the time comes, your entire scrubber, desulfurization with water......"

"My lord, what's the whole scrubber?" Wiltz was a little stunned......

"Made, it's not a thing, you just need to know how to use it...... Specifically, the exhaust gas rising from the calciner is passed through a pipe into the pool to avoid escape...... Because, this gas, it dissolves in water...... When collected, it can be used to make sulfuric acid ......"

"What is sulfuric acid?" Wiltz was curious.

"Your uncle, sulfuric acid is nothing, you don't need to know what it is, you can collect it, you don't need to know anything else! Remember, the water should be changed often, otherwise the sulfur dioxide dissolved in the water will be saturated......"

"Oh......" Wiltz nodded obediently, not retorting.

As for how the sulfurous acid produced becomes sulfuric acid, Marlin decided to go with the flow and convert as much as it wants, anyway, constantly stirring the sulfurous acid and mixing it with air (oxygen), it can always convert a part of it. After a long time, it can be slowly transformed a lot.

As for how much can be transformed in the end, it purely depends on the will of God. Anyway, the demand for sulfuric acid in Marlin is not large. In fact, Marlin knows how to convert SO2 to SO3 in industry, but that requires vanadium pentoxide or platinum as a catalyst. And Marlin didn't have either, so he had to choose natural transformation. Although the efficiency is low, it is also a helpless choice. Moreover, because the chemical industry has not developed, the demand for sulfuric acid is not large.

……

Seeing that Wiltz seemed to understand whether he understood or not, Marin didn't expect him to understand immediately. So, he simply asked the craftsmen to build a complete set of equipment for calcination and water desulfurization towers, and let Wiltz use it directly.

After calcination, nickel sulfide is converted into nickel oxide, which can be reduced to nickel in a blast furnace......

Marin then told Wilts to look carefully for iron ore near Moa. If you find iron ore, you can immediately smelt it in a blast furnace. If it doesn't rust, it's ferrochrome. It is then melted and mixed with pure nickel, and it becomes the legendary stainless steel...... It is said that there is a chromite mine called Mercedita near Moa, with reserves of up to one million tons, of which the content of chromium oxide (chromium trioxide) is as high as 38.40%. Just find this chromite ...... Well, it is estimated that some iron must be added to it, otherwise, the chromium content of the smelted metal is too high......

Marin remembers that the 304 stainless steel used to make stainless steel lunch boxes in later generations was 18% chromium and 8% nickel. Because of the limited level of science and technology, Marlin will definitely not be able to accurately make 304 stainless steel, but it is still possible to do it with more chromium content, which is not a bad thing anyway. As for nickel, because it is separated from ferrochrome, it is better to control the content. Anyway, the higher the chromium content, the more corrosion resistance there is. What Marin wants is corrosion resistance, and when the time comes, he can get the iron sheet that wraps around the hull of the ship. Moreover, with the current industrial level of the era, it is estimated that Marin will not be able to use up the 1 million tons of chromite......

After tutoring Wilts, Marin tutored Tara and Gaurard. For Tara, Marin is still very relieved. Especially in the area of pioneering, Tara is already very experienced. After all, the exploration of the twin islands, Tara has already experienced. It's just that Marin told him that in the early stage, he had to have a good relationship with those local Taino patriarchs, and he must gain a foothold. If the Taíno chiefs think that Havana is their territory, then they can give them some glass ornaments to "buy" the land and avoid disputes.

Then, in the nearest tribes, find and nurture those close to the colonizers, support them as leaders, and eventually bring those tribes under their rule. Next, train a group of Indian warriors, disguise themselves as the Caribs, the Taínos' sworn enemies, attack and kill the chiefs of the remaining tribes, and then, in the guise of the rescuers, take over the members of those tribes, and pretend to fight the "Caribs" to make them come back to their hearts......

Listening to Marin's intrigues against the Indians, the four new governors all broke out in a cold sweat - meow, I just went to be the governor, not to engage in conspiracy and trickery...... But these methods sound powerful......

As for Gourard, Marin didn't say anything, just asked him to build a base in Cologne now. Then, the base was surrounded by wormwood and pyrethrum, and then, relying on the black slaves bought from the Portuguese, they were told to cut down trees, in the direction of the Pacific Ocean, until a road was cut. Later, some cement will be transported over and a cement road will be paved to the end of the Pacific Ocean to facilitate transportation...... In short, Ghoillard's duty is to be a contractor who repairs roads and cuts trees...... Of course, you should pay attention to safety and avoid contracting terminal diseases such as yellow fever......