Datang: Time travel in two months, wait online, hurry up!

The current artillery fires a shell, which requires a series of operations, such as cleaning the barrel, pouring gunpowder, compacting it, then putting the shell in, placing the lead wire, lighting the match, and so on.

Although in this era, even if it is so cumbersome, it is invincible, but technology still needs to be researched.

"A breech-loading smoothbore? Blowing shells?"

Hearing Li Ke's words, the craftsmen of the Artillery Workshop suddenly had a look of thought in their eyes.

These were two words they had never heard of before, and they had a little guess about the breech-loading smoothbore gun.

Maybe it is similar to a musket, by pulling the trigger, loading bullets from the back?

That will indeed save a lot of time. They also had the idea of ​​​​applying this model to artillery, but they have not yet formally tested it.

As for the flower bomb, what is it?

"The rear-loading smoothbore gun is easy to understand. It is similar to the design of a musket. It can be loaded and fired from the rear, which can save a lot of time."

"But this mode has very high requirements for shells, so at this time, you need to use blooming shells!"

Li Ke briefly explained and explained to them.

"Flower bombs use brass as the shell, and add linear nitrocellulose gunpowder as the propellant inside."

"Then the shell is no longer a solid shell, but hollow, with a more powerful explosive added inside, and an impact fuze at the warhead."

"In this way, the percussion charge at the bottom of the shell is hit by the cannon, causing a small explosion, which ignites the propellant in the shell shell, and the explosion generates a strong thrust to launch the warhead!"

"After the warhead hits the target, the warhead part will hit the target heavily, thereby activating the fuze, causing the warhead to explode, causing huge damage!"

"This is the future development route of shells, you must study it seriously."

Li Ke drew a complete internal structure diagram of a cannonball on the blackboard, and explained it to them in detail while drawing it back.

These people have grown up to be experts in military industry, and now with Li Ke's detailed explanation, they also quickly understand the principle of shells!

"There is such a shell design!"

"It's so delicate, one link after another!"

"Is this equivalent to the principle of firing explosives from a cannon?"

"It seems to be true. It's just that the explosives thrown by the trebuchet have a short range and are afraid of water, but this shell is not afraid, and the range is very far!"

"It's just that, if you want to use copper as shells, how much will it cost?"

"Anyway, there is no need for copper coins now. It is a waste to put copper there, and it is nothing to use it for shells."

After listening to Li Ke's detailed explanation, everyone basically understood the principle of this shell, and discussed it one after another.

Some marveled at the exquisite internal design of the shell, and some saw the idea that this is the waterproof version of the explosive package and fired with a cannon.

And it also perfectly solves some shortcomings of explosive kits, such as fear of water and the like.

Also, if you use a trebuchet to throw it, the range is too short.

On the Goguryeo battlefield before, the shortcomings of the explosive package were fully demonstrated.

But if the Tang army is equipped with this kind of shells, the lethality caused to the enemy will be many times stronger than the previous solid shells.

However, everyone quickly thought of a very critical issue.

That is, how much would it cost if copper was used to make the casing of the shell?

To know how many shells were fired in a Goguryeo war, these were all produced by the Yangzhou Firearms Workshop, and they knew it well.

Those are all solid iron balls, which can be satisfied in today's era of explosive steel production.

But if all copper shells are used, after that battle, I am afraid that the copper will be wiped out, right?

Although everyone uses paper money now, copper is also a proper precious metal, so it is too extravagant to just throw it out like a cannonball?

Can't we use some other metal to make the shell shell?

Like iron, or even steel!

Now the output of steel is very high, and the cost has been reduced a lot.

It is still much cheaper to use steel as the shell of the shell.

Hearing everyone's discussion, not only did Li Ke not feel that someone disobeyed him, but he was very satisfied.

Technological research must be full of dialectics and doubts in order to make faster progress!

Of course, the question is questionable, the shell of the shell can only be made of copper.

There is also a reason for this, he also took a look at everyone, and was going to teach everyone a good lesson himself!

PS: The second update!corpse.

Chapter 343 Li Chengqian is ready to rebel!Penicillin was developed!

This edict in the newspaper is tantamount to dropping a blockbuster in Yangzhou and Suzhou.

It directly and completely changed the cognition and thinking of everyone in Yangzhou and Suzhou.

Although Li Ke was the guarantee before, everyone recognized these three new disciplines very much.

But I still feel a little worried about the future of these three new subjects, and I still feel that it is safer to study the Four Books and Five Classics.

After all, to learn new subjects is to work in Yangzhou at most, but if you study the Four Books and Five Classics, if you take the high school imperial examination, you may become a bachelor of Hongwenguan later!

If he could become a great Confucianist like Kong Yingda, he would be famous in history.

But after the content of this edict was exposed, everyone's thinking was completely changed.

Because these three new subjects have also been added to the imperial examination subjects, if you don't study hard, you will not be as good as others in the imperial examination in the future.

If you study well, you can lead others in the imperial examinations, get better grades, and get higher rankings.

Therefore, in the future, they will definitely supervise their children strictly and study three new subjects seriously.

Moreover, the concepts of Science Museum and Engineering Museum proposed in the imperial decree, as well as the status and treatment of Bachelor of Science Museum and Bachelor of Engineering Museum, shocked everyone even more.

Since learning these three new subjects can also become a bachelor-level figure and leave a name in history, it is natural to study it seriously!

Besides, Yangzhou and Suzhou are the first places to learn these three new disciplines, and they will have a first-mover advantage in the future, and the probability of making outstanding contributions will be higher.

It can be said that it is much less difficult for their children to become bachelors of Science Museum and Engineering Museum than Hongwen Museum!

Everyone will still settle accounts in their hearts. Soon, even if they understand which one is more promising, they will naturally have a decision in their hearts.

So, in the next period of time, Li Ke received the news from below.

It is said that it is 21 days in various government schools, everyone's enthusiasm for learning the three new subjects is unprecedentedly high, and everyone is studying very seriously.

Upon receiving this news, Li Ke couldn't help laughing.

Enthusiasm is high, he hopes that everyone's enthusiasm for learning will become higher and higher, so that more talents can be cultivated as soon as possible.

Next, time passed quickly.

Nearly three months have passed since the first batch of merchants went out to sea.

Li Ke calculated the time, and it was almost time to come back.

During this period of time, Li Chunfeng and Yuan Tiangang had drawn a complete line of longitude and latitude with Zhuque Street in Chang'an City as the prime meridian, and standardized the latitude and longitude.

And under Li Ke's guidance, they also successfully developed a sextant.

After that, use the sextant to calculate through the observed data, and then get a latitude and longitude, and verify it on the map.

After a lot of tests and calculations, they improved the sextant even more.

The coordinates determined by the sextant and the map are becoming more and more accurate. Although the accuracy is far behind modern satellite positioning, it is at least within a range.

In the vast sea, as long as you can know a rough range, it is already a great help!

So, the latitude and longitude lines and sextant are complete.

After three months of construction, the Navigation Academy is basically completed and ready to be put into use.

After all, after the blueprints are released, there are a large number of workers in Shanghai City, and the college can be built in a very short period of time.

"Yuan Tiangang and Li Chunfeng went to Hainan Airlines Academy as lecturers, mainly teaching students how to use the sextant and how to calculate latitude and longitude!"

Li Ke made arrangements for Yuan Tiangang and Li Chunfeng.

"Yes, Your Highness!"

Yuan Tiangang and Li Chunfeng were also quite excited.

During this period of time, they used the sextant many times to determine their latitude and longitude in many places, and looked for the corresponding latitude and longitude on the map.

In the end, they found that their location was almost the same as the latitude and longitude on the map. This discovery made them very excited!

Because this is a great advance in astronomy and geography!

Now, more people can be taught to use sextant and latitude and longitude, which is undoubtedly a promotion of astronomy and geography.

The two of them are still very excited about this task.

There are lecturers in navigation, there are lecturers in position identification, and the construction of the Nautical Academy has been completed.

Everything is ready, just recruiting students.

Recruiting students is also simple.

As long as the first batch of merchants who went to sea came back and the demand for captains and seamen in the entire market suddenly increased, there would naturally be a large number of people who wanted to study at the Nautical Academy.

At that time, publicize a little in the newspapers, such as how high the salaries of the captain and seafarers are, how big the talent gap is, and so on.

It is guaranteed that there will be an endless stream of people signing up for the Nautical Academy!

And this time is coming soon.

Li Ke first asked the Nautical Academy to start preparing for enrollment, as well as some follow-up preparations.

He spends leisurely time with his family at home.

Now, the bellies of Kinderman and Jin Shengman have grown obviously.

After all, I have been pregnant for nearly six months, and I will give birth in about four months.

Since this is Li Ke's first and second child, the two are already the focus of the family's care.

All kinds of nutritious things are prepared for the two of them every day.

And as the belly got bigger and bigger, Li Ke also saw the brilliance of motherhood in the two.

Even Jin Shengman, who is quite lively, seems to have matured a lot, and there is a hint of maternal love in his eyes.

In this regard, Li Ke considered that the current production environment is very worrying, so he specially set up an obstetrics and gynecology department, which is full of female doctors.

He personally explained to these female doctors the medical knowledge related to obstetrics and gynecology, some points that need attention, and so on.

After all, he will not only have these two children in the future, but will have more children in the future.

In ancient times, giving birth was very dangerous. Once something went wrong, it was likely to be a tragedy of two lives.

This issue cannot be ignored by him, so he is extremely concerned about it.

Under his personal guidance, female doctors in obstetrics and gynecology have made great progress in this area of ​​medical knowledge.

After they all learned about the same, Li Ke asked them to go out to deliver babies for the mothers in Yangzhou City and Suzhou City.

Under the training of obstetrics and gynecology knowledge close to modern medicine, they also pay great attention to hygiene when delivering babies.

The delivery room must be sterilized with disinfectant, and all instruments used are also sterilized with boiling water and alcohol.

And the way and technique of delivery are more scientific and safer.

In this way, they seem to have become a well-known midwifery team in Yangzhou and Suzhou, delivering more than a dozen mothers in a row within a month.

Since the shot, there have been no accidents, and every mother gave birth safely.

And I don't know if it's metaphysics or what, but among the dozen or so children they delivered, all of them were girls!

Later, the people in Yangzhou and Suzhou were unwilling to let them deliver babies.

How can it be possible that all the deliveries are girls?

In this era, everyone's thinking is still dominated by boys.

Regarding this, Li Ke couldn't help but burst out laughing, he didn't expect this kind of thing to happen again.

But he didn't care about this. What he cared about was their level of delivery, which had reached a level that satisfied him.