What is the use of oil, Europeans in this era may not understand, but Marin is very clear. Not to mention the modern applications of gasoline, diesel, lubricating oil and other modern applications in later generations, but oil itself has many local applications in this era.

For example, setting fire to the enemy with oil or something. The most classic is that ancient China used oil as "fire oil", which was the main force of fire attack. In ancient China, sulfur and fire oil were the sharpest weapons of fire. Among them, the power of fire oil is greater than that of sulfur. Because, once the oil is ignited, it cannot be extinguished by water, and the effect is extremely powerful.

In the wars of ancient China, kerosene (oil) was successfully used in warfare many times. For example, the defender of the city can use fire oil to burn the enemy's siege equipment. In addition, in the Later Liang period, there are also records of burning enemy ships by putting fire oil in iron cans and using trebuchets to "shoot" them.

Of course, this "manipulation" is more dangerous. Because, once the oil was not successfully thrown, but fell on the ship...... The one that burned was our ship...... However, it is safer to attack ships from land. However, it also takes a lot of luck to be able to throw it accurately on the enemy ship.

If it is really thrown into the ship by an oil canister, it will be dangerous, much more dangerous than a medium round of iron ball shells. Because iron ball cannonballs may not be able to smash ships, and oil canisters can easily burn down ships. After all, ancient ships were all made of wood, and they were most afraid of burning.

However, for the more dangerous naval battles, Marin is more interested in whether he can use oil to burn down the enemy's city gates......

Now many large cities in Europe have switched to iron gates, and there may be no fever. However, for the time being, the gates of most European cities are still made of wood. If you pour oil on it, set it on fire...... It seems that without shelling, the gates of the other side can be burned. When the time comes, throw another barrel of fire, and the city gate will naturally be able to break through smoothly, even if it is useless to block the hole in the city gate.

Coincidentally, this attack on Scotland, it seems that the gate of Edinburgh, the capital of Scotland, is made of wood......

Therefore, when Marin saw the oil, he seemed very excited, and he didn't care about the fat steward's corruption. Those are all small things, and the matter of life and death of the country is the real big thing. Even, Marin didn't mind rewarding the two brothers.

Moreover, Marin had already made up his mind to send spies to the Vistula Valley in Galicia, Poland, to buy the land rights in the area where those oil wells were located, and then monopolize those artificial oil wells......

After that, Marlin had a source of fire oil. If you want to play a fire attack or something, the materials are there. If you want to get a fireboat tactic...... Hehe, hehe......

Anyway, as long as there is oil, in the future, the wooden city gates of European countries will be equivalent to no defense for Marin......

The walls of European cities are too strong, they are all made of stone, and they are stronger than the brick walls of ancient China. If you use shelling, it is estimated that it will take a long time for the shelling to break down the walls. Unless you use a 17-ton cannon with shells weighing 1,500 pounds, such as the "Urban Artillery" that Turkey used to break through Constantinople, it would be easy to break through the stone walls.

However, the urban artillery was too heavy, with a weight of 17 tons, not to mention how difficult it was to cast, transportation alone was a huge problem. It was used in the siege of Constantinople because Constantinople was located on the sea's edge, making it easy for Urban artillery to be unloaded from ships. If you were deep inland, you wouldn't be able to transport such a behemoth. You know, in those days, the carriage weighed no more than one or two tons. Even with a 4-horse cart, it is difficult to carry a weight of more than seven or eight tons, let alone a 17-ton super-heavy gun? Therefore, the urban artillery was only used in the siege of Constantinople, and as for the siege of the interior, such heavy artillery could not be delivered at all.

Therefore, if the enemy's city is a wooden gate, it is more cost-effective to burn the gate with oil. If you want to break through the city gate, no matter how difficult it is, the consumption of gunpowder alone is an astronomical amount that makes people feel distressed.

……

Upon returning to the palace, Marin immediately began his experiments. However, the burning of oil is not as powerful as Marin imagined. Because, the burning intensity of oil is stronger than that of ordinary oil, and it cannot reach a very violent degree. Moreover, the black smoke from the burning of oil is so large that it seems that it does not burn completely......

Speaking of the black smoke of oil, Ma Lin seems to think of a story in ancient China, the ancients seem to have used the characteristics of oil to burn black smoke to make a kind of high-grade ink block oil smoke ink......

The so-called oil smoke ink is not the same thing as ink. Oil smoke ink and pine smoke ink are black ash inks extracted from black smoke, which are special for inkstones in ancient China. When the ancients wrote, they would use ink blocks to grind on an inkstone, and then mix it with water to form ink. At the beginning, the modules used by the ancients to grind ink were all natural ink, that is, the legendary graphite. However, graphite production was limited, so people later came up with pine smoke ink. Pine smoke ink, that is, the pine wood that is a little "tidal" is ignited. Because the combustion is incomplete, there is a lot of black ash. Then, cover the flame with a damp cloth. When the black ash of the incompletely burned pine rises and touches the "wet" wet cloth, it is trapped. Then, it is extracted and reprocessed, and a very high-grade pine smoke ink is obtained. The so-called smoke is the black smoke when it is not completely burned. The black smoke carries black ash and is a very high-grade toner. Later, people came up with oil smoke ink. However, this oil does not refer to oil alone, but mostly refers to the oil of the tung tree. Because, in order to make pine smoke ink, the cutting of pine trees is too severe. Later, people used the faster-growing tung wood instead of pine wood, and lit the collected soot to make soot ink.

However, the black smoke when the oil is burned can also collect toner, and high-grade oil smoke ink can also be obtained. In ancient China, the ancients did just that, directly taking oil and burning it, and then extracting the black ash of black smoke to make ink blocks.

……

In other words, the combustion of unprocessed oil is not complete, and the burning intensity is not strong enough, and it is difficult to burn down the city gate at once. Then, it needs to be purified......

"Purify...... Marin thought for a while, called his subordinates, and went to the distillery to ask for a tin tin with a steamed second pot head......

Yes, steam the tin of the second pot head. The processing principle of petroleum, Marin also understands a little, isn't it fractionation at different temperatures? Fractionated tamalin can't be made, mainly because of temperature control, which he can't do. In addition, how to control oil and gas at different temperatures into different outlets, Marin did not understand. After all, he didn't study petrochemicals.

However, it is relatively simple to separate the gasoline with the lowest distillation temperature. The props used are to use a tin tin with the head of the second pot to distill it. With a "low temperature" of more than 100 degrees, Marin quickly got a batch of light gasoline with a tin pan. Then, twenty barrels of oil, Marin distilled a barrel of light gasoline with a tin tin with a second pot head.

In fact, 20 barrels of oil is much more than just one barrel of gasoline. However, Marlin's technology is backward, and he cannot separate heavy gasoline, let alone understand what hydrocracking technology is. So, he could only extract this little bit of gasoline.

Among the oil, the most violently burned is gasoline. Even, to a certain extent, gasoline can cause an explosion when burned. Such a fierce "fire oil" is completely the sharpest weapon to burn down the wooden city gate.

Marlin then took out a vial of gasoline and conducted a combustion test. Sure enough, the gasoline burned fast and violently. If a bucket of gasoline is poured on the wooden gates of the Scottish city of Edinburgh, a fire is lit...... Hehe, the gates of Edinburgh are bound to be finished, and the speed is very fast......

Moreover, there is another benefit to gasoline. That's where it came from, no one knows......

As long as Marin blocked the good news, then no one knew that gasoline was extracted from black oil. After all, the appearance of black oil and colorless gasoline is too different. If you don't understand the principle, no one knows that the two will be connected. The use of gasoline to burn the city gates is particularly secretive......

It just so happened that the Fourth Army was going to attack Edinburgh. Marin decided to send the barrel of gasoline and let the Demomen of the Fourth Regiment take the barrel with it, pour it on the wooden gates of Edinburgh, and set it on fire......

And this barrel of gasoline, Marin estimated that it should be the first barrel of gasoline in the world in this time and space he traveled......

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