In the library on the top floor of the Mage Guild, Al and Sheldon's eyes were red like rabbit eyes. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 info In front of them, a strange hemispherical object is placed. The base is a gray-black disc, there is a small hole in the surface, a thin rope sticks out of the hole, the disc is covered with a semi-circular cover made of crystal, looking through the transparent cover, you can see the intricate patterns engraved on the disc, and several thin lines supported by the hole in the middle of the disc. Both of them frowned, and even Sheldon looked a little nervous.

"Here we go. Al spoke, pulling the string suddenly, only to see that in an instant, the light in the crystal cover was bright, and the bright and even dazzling light reflected the surroundings in a snow-white, Al couldn't help but close his eyes, "Damn, this light is too bright and too fierce, I guess there will still be problems." Sure enough, it was like a brilliant firework, a flash in the pan, and the dazzling light flickered a few more times after a very short period of time, and finally completely dimmed.

"Failed. Al lamented, and Sheldon, beside him, remained silent, thinking about something. Al removed the crystal cover, removed the wick from the metal fork, and examined it carefully.

The completely charred wick shrunk into a ball, emitting a pungent stench, and Al tried to pull the thread apart, only to find that the wicks had already melted together, indistinguishable from each other. "It was directly melted, is it that the air is not clean. ", Al said to Shelton.

Sheldon shook his head, "That wind magic just now is already the strongest under this condition, and it is very difficult to be both powerful and carefully controlled. Also, I think the idea of using wind magic to drain qi is inherently wrong and unrealistic. ”

"Do you really have to get out of breath? This condition is really too difficult to achieve. Sheldon asked rhetorically.

"If there is gas, this wick will burn when it is gas, and it will not last long before it will burn out, and it will not last long, is it not a large candle with electricity? This is too far from what we thought before, which can last at least seven to ten days, and it is absolutely not feasible. Al explained.

"What is the principle of everything burning when it is gasy? Can you be so sure?", Sheldon asked.

Al spread his hands, "I don't know exactly how it works, but it's the conclusion I've come to after many experiments, and I can repeat it right away, and you'll understand." ”

With a large amount of materials at hand, Al instructed Sheldon to melt the two iron ingots into the shape of an iron pot, and asked him to build a tightly fitting lid. Al poured half a pot of lamp oil into the iron pot and lit it directly. The flames rushed up more than half a meter high, and the billowing smoke choked people, and Al directly covered the iron pot with the lid, only to hear a crackling sound in the pot, like fried beans.

After a while, the iron pot gradually fell silent, until there was no sound at all, and Al lifted the lid to see that the fire had been completely extinguished, and there was still a little lamp oil left in the pot.

Al pointed to the lamp oil and said, "Mr. Sheldon, look. There was any oil left, but the fire was completely extinguished. I think it's because the lid was just closed, so the gas inside and outside the pot couldn't circulate, and the gas inside the pot burned out, and the fire was extinguished. ”

This experiment illustrates that everything burns when it comes to gas, at least for combustion, gas is an indispensable condition. ”

In order to enhance the explanatory power, he added: "In daily life, if you accidentally catch a fire, and there is no water source around, you can use clothes to extinguish it, which is also the principle. Or if there is a fire when stir-frying, you must not pour water on it, just like pouring oil on the fire, not only can not be extinguished, but the less and more intense, then you must take the lid of the pot and cover it directly, and the fire will be extinguished after a while. ”

Sheldon accepted his explanation, exclaiming, "No wonder it is written in the book: everything in the world is knowledgeable, and it seems that stupid humans are still a little clever." ”

sighed and sighed, the problem still had to be solved, and both of them used their brains to think about it. Sheldon improved a few more wind circles, but just wanted to use magic to pump out, but he couldn't keep the crystal cover closed, which became a dead end and difficult to solve.

He changed his mind again, and wanted to integrate the wind system circle into Sheldon's circle, but this circle was already embedded with an electric circle, and he wanted to make these two circles work without interfering with each other, and fundamentally change the structure of the original circle, and add other auxiliary circles, so that the final circle would be geometrically complicated, and Sheldon estimated that it would take at least more than a year to design an effective circle.

Unlike Sheldon, Al clearly knows that artificial vacuum has long been achieved on the earth, not to mention those scientific research institutions, vacuum packaging, small vacuum pumps and other applications have already entered thousands of households, not an unattainable cutting-edge product.

Al's first thought was of the air pump, but unfortunately he couldn't even figure out the relatively simple mechanical structure of the piston, let alone the more complex structure of the pump.

"What about a pump? Squeeze the air out with a plug. He started from daily life and wanted to solve it through some "local methods", "The problem is that the pump is fully enclosed, and in order to squeeze the air, the plug must be as big as the air pump." And this crystal cover contains a wick, and the plug can't crush the wick? ”

"If only magic could turn something into nothing, something out of nothing. First squeeze the crystal cover into a vacuum, then change the plug inside, and then change the wick inside, if only it could be changed like this. Of course, El is just saying that if magic can really do this kind of thing, the mages will be invincible in the world, and they will not succumb to the obscenity of the Holy Sect, and they will be like lost dogs.

"Take it out, take it out...... Yes, that's fine. Al had a flash of inspiration and came up with an idea. He filled the crystal cover with water, covered the mouth with a leather water pipe, put the crystal cover upside down, let the water flow out of the water pipe, and sealed the mouth as soon as the water ran out, so that there should be no air in the crystal cover without water.

This is a local method, and it is also very ingenious: using the method of using water without air, first fill the crystal cover with water, and when the water is discharged, there will naturally be no air in the empty cover, and the principle is actually similar to that of a pump.

After Sheldon found out, he looked at Al differently, in his words, he was much smarter, and he was a little wiser. However, after the actual experiment, the effect is not very ideal, and the wick still burns.

"It is better to use water alone to drain it cleanly, and it is better to have a dense one, like metal, but metal cannot maintain the integrity of the wick. Al was in trouble again.

Like both metal and liquid, Al remembered a substance known as a "metallic liquid" called mercury.