What Zhao Shizhen brought was a strange big thing.

Simply put, it looks like a box truck, but it is mostly made of iron, with a square iron frame on the front, with a "dry" iron rod hanging on it, and a very thick square steel block hanging down straight down as a pendulum.

Li Zhi couldn't understand what this thing was for.

The box plate on the side of it was black ink, and the hanging iron rod had parallel arms that were only next to the blackboard. Zhao Shizhen inserted a lime stick on it.

Chen Mu said: "This was made by Changji by craftsmen. He originally pursued symmetry, beauty and decoration. After I looked at it, I removed all the useless things and only retained its functions."

"Function?"

"Yes, Changji wants to use this thing to measure the power of muskets and even cannons."

Chen Mu said, lifting his pendant again, saying: "The gun balls are charged according to the standard and hit the steel block nearby. The lead balls push the steel block back and swing upwards. The trajectory drawn by the lime on the blackboard is the power of the gun."

"This is not accurate." Chen Mu added: "Although the weight of the gun pill, the amount of gunpowder and the total weight of the pendulum can be measured and weighed correctly, the power of the projectile being consumed when hitting the pendulum is consumed, so it cannot be measured completely."

"But relatively speaking, as long as you use this tool to measure the numbers, the obtained numbers are accurate. Under different shapes, which rod is stronger and which rod is weaker, it is clear at a glance."

Li Zhi is still receiving indigested information.

It is not that the principles of this machine are difficult to understand, nor is it just about knowledge about firearms, but more importantly, why Chen Mu and Zhao Shizhen need to measure these things.

But he didn't ask, and Chen Mu naturally didn't answer, but just smiled and said, "Chang Ji had used this test gun and knocked the iron rod away."

In fact, the Dongyang Military Office has another method to measure speed, which is two similar machines equipped with stopwatches, one of which is a vulnerable part extends outside.

Use the shooter to hit two machine parts at a time that are fifty steps apart at the same time to obtain the value of this period of time for calculation.

The machine is not a stopwatch, it is just a similar clockwork timing tool. This is not difficult to make, but the key point is that the experimental operation is difficult, costly, and there are also great deviations.

It was also done by Zhao Shizhen, and Secretary Zhao is also considered a person with extraordinary perseverance.

In recent years, the Eastern Military Office has been heavily business. Whether it is Majiagang, Makino, the great development of central North Asia, or Peru, Colombia, and Riogu in the south, they all need to be summarized into the Military Office.

It is already very difficult to sort out the affairs.

Especially on the North Asian grassland, a place that may be registered in this year is called Niujiao Jingou River, because the place where the pioneers in Hexi live is called Niujiaozhai, and the place where the pioneers in Hedong live is called Jingou.

Perhaps the next year, Niujiao Village in Hexi disappeared due to an accident and went to Hedong to collect gold. As a result, the people who went to Niujiao Village in the third year did not know the name, so they sent people back to the Dongyang Military Mansion to re-register it as XX.

It is also possible that due to the clerk's omission, multiple names in a place are used in parallel by different people, which is very complicated.

This situation may not be improved until the railway is built, but in the past five or ten years, the railways in Dongyang Asia may not be completed even on the eastern coast.

This place is not like Zhongzhou of the Ming Dynasty. It does not have such good infrastructure, nor does it have so much manpower and industry intensiveness.

At this stage, the railway tracks running light railways can be built by themselves, not to mention that every county can be built by itself, but as long as the specifications are mastered, it is no problem to manufacture by itself with the help of Beiyang craftsmen.

This is the basis for local railways to be fully mobilized after the people see the benefits and build railways independently based on counties - they have such ability and desire.

Dongyang, these two basic requirements are not met.

I can't see anything walking upright on the vastest wasteland for more than ten miles. Not to mention building a railway, I can't even build a dirt road.

If you assemble owners from four settlements and three tribes within a radius of three hundred miles, you can crush people to death by just those with high logistics pressure.

However, in recent years, more and more immigrants from the local area have been coming. Every year, thousands of boats and tens of thousands of people travel across the ocean.

There are many people who do business, move, deliver goods, visit relatives, retire, and even come to relax without passing the Jinshi exam.

Many businessmen registered their nationality in their local and Asian states, and moved their families over after receiving the real estate.

In fact, the military government does not care about the arrival of the large population. Nowadays, the counties in Asia have much stronger affordability than in the past. With the assimilation of the indigenous people, the government treats the people equally, and there are already millions of registered residents in the Huangcai.

Thirty years later, people here will even forget the title of natives because they have already taken root here.

Even in such a busy work, Zhao Shizhen could make some gadgets to entertain himself.

In other words, Zhao Shizhen has no hobbies like other scholars. Since he has followed Chen Mu, he has been with guns and cannons all day long. Although he has never been on a serious battlefield, he still has mastered a lot of strange knowledge used for military affairs.

Mastering strange knowledge cannot be used, which may be the most depressing thing for people, so Zhao Shizhen will struggle with something that is missing when he is free.

In the past, I studied bird guns and made a lot of strange guns. Maybe later I found that even if I made them, the chance of being equipped on a large scale was very small. The Ming Dynasty's standard firearm was basically finalized, so I turned to study tools to study the performance of firearms.

But occasionally, they will continue to torture individual firearms, and they are those that do not intend to be equipped on a large scale, such as double-barrel hand guns and large-caliber hand guns, which are all small toys that you have nothing to do at home.

When Chen Mu introduced this thing called the pendulum ballistic meter, he walked up and took out the pistol from his waist, which was aimed at the pendulum.

The momentum was like a child who could find a chance to fire the gun, which scared Li Zhi very much.

He has never seen such a person in the past. It is not a disagreement. It is a role of taking out a firearm when he is idle.

The smoke filled the gunpowder, and the pendulum was pushed back hard, drawing a white arc on the blackboard.

Zhao Shizhen went around there and looked at Li Zhi, smiling at him, weighing his gun: "This is a 70% gun, which means that if the caliber and drug dosage are standard, its power is 70% of that of Taiping Guns in the world."

Li Zhi nodded in a vague way, and then he heard Chen Mu pointing at the pendulum and saying, "What Chen means is to ask the teacher to educate the students and make them people like this machine."

"It's not good-looking, not exquisite enough. The materials are simple but solid. The most important thing is... it can solve the problem."

"Being a pendulum must be able to solve the problem of firearm ballistics; being a human being must be able to solve the problems of the court."
Chapter completed!