In the Guanshi Mountain Academy, Di Renjie took a long breath.

"It's finally done!"

At the beginning, Di Renjie thought that this lighter should be very simple.

However, after making a few samples, it turned out that this was not the case at all.

The smaller the part, the higher the demand for precision.

In a way, the smaller you can do the same thing, the more powerful it is.

For example, the motors of later generations, some very small motors, much smaller than a finger, are basically monopolized by those few manufacturers in the world.

Of course, it's not that big is easy.

Equipment such as stamping and forging is more difficult to a certain extent.

"Smack!"

With a crisp sound, the lighter in Di Renjie's hand was successfully lit.

"Second Senior Brother, is it really lit?"

Lu Zhaolin watched the excitement from the sidelines, with a surprised expression on his face.

It stands to reason that Lu Zhaolin should still be in elementary school at his age, but this guy's learning ability is too strong, and when he stays in primary school, the teachers don't know how to teach at all.

So Li Kuan simply herded the sheep and let him go in and out of Guanshishan Academy freely, and listened to whichever teaching he liked.

"Let's go! We went to Wang Fugui and asked him to coordinate the mass production of lighters. ”

Di Renjie knows Li Kuan very well, and knows that what he is going to do at this time is what Li Kuan really wants to see.

Running in front of Li Kuan to report the good news, this is not Di Renjie's choice at the moment.

Either don't do it, or do it and do it to the best.

Obviously, Li Kuan did not arrange to make his own lighters for a few samples.

With Di Renjie's ingenuity, he is also very aware of the importance of lighters to Datang.

……

In Weishui Academy, Yu Wenshan lit several piles of pine branches one after another with a happy face.

Some of these pine branches are relatively wet, and some of them are fans by someone next to them, simulating a howling wind.

Even so, several piles of pine branches used for comparative experiments were successfully ignited.

"Yuwen Teaching, this flint is much better than what everyone used in the past. For example, if you use traditional flint, even if you can light it, it can't be done in a moment. It's like now, almost a few strokes to point it. ”

The eldest grandson Ming is a collateral child of the eldest grandson's family, but the deep eldest grandson Chong values it, and now he is arranged to study in Weishui Academy.

For the flint project that Changsun Chong now attaches great importance to, he naturally follows it personally.

"This batch of flints is indeed much better than the last one, but there is another problem, that is, we have not fully understood the material of this flint. The slag produced by different iron-making furnaces is made into flint, and the effect varies greatly. If only all of them could be the same as this batch, that would be great. ”

Yu Wenshan stroked his beard very humbly, but there was a smile on his face that couldn't be concealed.

Regardless of the problems of mass production of this ignition stone, at least the current experiments have proved that his research direction is correct.

Even if you are a little lazy, it is no problem to directly use this batch of goods to deal with the Tang Royal Military Academy.

"Yuwen Teaching, I saw a new book published by Guanshishan Academy in Xinhua Bookstore a few days ago, which mentioned the concept of material properties and material composition. You said that the ignition effect of flint made from different slags is more obvious, is it due to the different cost of materials?

Is it possible to record the raw materials used in each ironmaking furnace and then pour out the optimal recipe according to the effect of the flint stone made from the corresponding slag? ”

Changsun Ming's technology can be trusted by Changsun Chong, and he naturally has some ability.

Although what he said was too superficial in the eyes of later generations of students.

But in this era, for all kinds of scientific theories, it is really not a little lacking.

"That's fine, but what is it in the slag that makes the difference in the effect of the flint? If you don't understand this problem, it should be difficult to find the ideal way to make flint. ”

Yu Wenshan is a master craftsman, and he has the most say in the importance and difficulty of material formulation.

"Anyway, it's a direction after all. Now this batch of flints, there are thousands of pieces, and they are provided to the Tang Royal Military Academy, which is enough. ”

"That's right, then you can take the sample and go to Changsun Langjun."

Yu Wenshan felt that he couldn't have any better way in the short term, so it was better to take the bounty of the Tang Royal Military Academy first.

As the teacher of Weishui Academy, he naturally hopes that the Gewu College of his academy can be as famous as Guanshishan Academy.

……

In the Tang Royal Military Academy, Qin Qiong studied the art of war in his office.

According to Li Kuan's suggestion, the training methods of the military academy are very different from those of the previous government soldiers, and the division of arms has also been adjusted.

Correspondingly, some tactics and military formations had to be adjusted accordingly.

As a general, it is also necessary to adjust the art of war in a timely manner.

"Uncle Bao! Uncle Bao! ”

Qin Qiong vaguely found a little idea, but it turned out to be disturbed by Niu Jinda, who ran in in a hurry, and his face was naturally not so good-looking.

"Jinda, when did you do the same thing as Zhijie, and act recklessly?"

"Uncle Bao! Good thing, I'll show you a good thing! ”

Niu Jinda didn't care, and came directly to Qin Qiong's table.

"Look, what is this?"

"Flint and steel!"

Qin Qiong was a little confused about what medicine Niu Jinda had taken wrong today, so she recklessly broke into her office with a flint and steel.

Fortunately, there was no maid sitting there in the house that was inappropriate, and he would not be there "left hand and right hand slow motion" for no reason, so it didn't matter.

"That's right, that's flint and steel!" Niu Jinda slapped the flint in his hand on the table, "But this is not an ordinary flint!" ”

"Huh? Not your average flint and steel? ”

Qin Qiong frowned and picked up the flint on the table and looked at it curiously.

It had only been long since the Datang Royal Military Academy offered a reward in several major newspapers such as "Datang Daily", and Qin Qiong was naturally impressed by it.

Now that Niu Jinda came in with a flint and steel, could it be that the bounty would come to an end so soon?

"Smack!"

Qin Qiong skillfully picked up the flint and steel, but the sparks in front of him almost startled him.

Immediately after, though, his face was filled with joy.

The flint and steel in front of you obviously have a very unusual ignition function.

"Uncle Bao, how's it going? Isn't it different? ”

Niu Jinda saw such a surprised expression on Qin Qiong's face, and couldn't help laughing.