The effect of Tree Iron is much better than that of mercury, and it can be said that it greatly exceeds El's expectations. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 The biggest problem with info mercury is that it will volatilize at room temperature, and it is highly toxic, and the human body will inhale too much to damage brain tissue, and even cause symptoms such as hepatitis, nephritis, blood in the urine and uremia, which is commonly known as mercury poisoning. Al had already thought that if he did find mercury, he would try to make a simple and easy gas mask out of charcoal as a prevent.

Fortunately, the substance does not volatilize at room temperature, and Sheldon also explained to him the harmlessness of tree iron, so Al was relieved.

Another advantage of the Tree Iron is its incredibly high density, and the incredible weight of the Tree Iron in the small crystal cover minimizes the amount of air in the crystal cover after pouring out, extending the life of the wick.

In order to reduce the air content in the crystal cover, Al and Sheldon also did everything possible to use all kinds of tricks. They carved small holes in the disc engraved with the magic circle to ensure that the iron of the tree was discharged without separating the disc and the crystal cover, and the small holes were quickly plugged after discharge. In addition, in order to ensure that the laid Sheldon circle is not affected by the outflow of tree iron, Sheldon uses magic to attach a layer of frost to the surface of the circle, using the immiscible nature of tree iron and water to avoid the circle being "polluted", and then only need to heat it slightly to melt the ice.

In this way, using these "little tricks", the two finally made a more satisfactory experiment.

Another key to the electric light is the wick, on the earth, Edison experimented with a total of about 6,000 kinds of plant fiber materials, and then discovered tungsten filament, to create the first generation of incandescent lamp, and it was not until later that the invention of drawn tungsten filament was successful, leading to the emergence of modern incandescent lamp. Compared with the earth, the processing of the wick in this world is much simpler, and on the earth, due to the insufficient level of technology at that time, it is impossible to make slender metal filaments, so it can only be replaced by carbon fiber.

And in this world, there is an archmage like Sheldon, who can manipulate the flame as he pleases, and all kinds of metals are kneaded by him like dough in his hands, making filaments is much easier, and the most difficult point is to find the right wick material.

Of course, El couldn't have experimented with a thousand materials in total like Edison did, and Sheldon didn't have that many magic materials for him to waste. The key characteristics of the material suitable for the wick are that it remains stable at high temperatures without melting, and at the same time, it has high resistivity and good strength to ensure that it can maintain a stable light source after power-on. He told Sheldon about these properties, and with his vast knowledge, he found the materials that matched the properties and experimented with them.

Because Sheldon had experimented with hundreds of materials in order to study the magic circle in his early years, he was familiar with the properties of these materials and knew them well, so it can be said that he had prepared for thousands of experiments. With Sheldon's help, Al identified a total of twelve, and after rigorous experimentation, he finally made a final decision.

"Just use this Tier stone, I think it's the best fit. ”

"Why? From the experiment, the materials such as Star Steel, Mithril, and Adamantite all perform well. ", Sheldon asked.

Al's answer was absolutely unexpected, "Because this material is the cheapest, and of course it is cheaper when the performance is almost the same." ”

"How can the price of materials be determined by the study of magic? And there is no such thing as magic, good is good, bad is bad, how can you fool the past with the same statement!", Sheldon unsurprisingly frenzied, he is often uncharacteristically irritable and stubborn on this subject, to use an earthly parlance, "the stubbornness of scientists".

"Of course, the reason is that I want to sell electric lights as a commodity, and the price is as low as possible without sacrificing quality. Looking at Sheldon's look of disbelief, Al repeated, "You heard me right, I wanted to sell the electric light as a commodity. ”

Sheldon's face quickly became dull, and he returned to the same appearance as when he first met Al, and he sarcastically said, "It turns out that our Mr. El is not only a nobleman, but also a businessman, which is really gratifying. Arrogance, jealousy, anger, laziness, greed, gluttony, and lust – it is rare to see two identities that can capture these seven virtues at the same time in one person. He bowed in respect, but when he raised his body, his face was already furious, "Then what are you still doing as a mage?"

In the face of the angry and even a somewhat terrifying Sheldon, Al's face was surprisingly calm, and he asked with a flat face: "Then Mr. Sheldon, you are a mage for your interest, then I ask you, what is the use of so-called magic?"

"How could it be useless, didn't I still have fire magic to process metal just now?"

"Then I want to ask you, have you ever used this magic to help others, for example, you have used fire magic to work metal, have you ever made farm tools for the civilians of Hileven District, have you ever made ordnance for the city guards?", Al's rhetorical question was exchanged for a long silence.

"I've been wondering, what are we mages studying magic for? To satisfy our curiosity, to explore the truth of this world? So what is the magic we have studied? Flying fires, tsunamis, deadly cold, what are these powerful magic used for? In other words, we mages study magic to be executioners, to become butchers?"

"So I hope to use your circle, the electric light made from Sheldon's circle, to illuminate the long night and the darkness that surrounds people. ”

"At least, our mage's magic isn't just for killing, it's also for helping, even if it's one. ”

In the face of Al's tirade in one breath, and his eyes staring at him, Sheldon found that he had nothing to say, and what reason did he have to reprimand, "I'm just curious, how did I suddenly take on such a heavy responsibility?", he thought helplessly.

But Al's words still moved him, especially Al's first few rhetorical questions, which shocked him a lot. After all, for Sheldon, who uses "stupid humans" as a mantra, these are questions he has never thought about and never realized.

"Why do you always look like a student in front of this kid?" suddenly thought to him.