Letai and other descendants of the Mo family are now teaching in the academy, and Xia Hongsheng asked Letai to help, so naturally it was no problem. The music stage saw that it could show the Mohist tricks, so he was even more willing.

Xia Hongsheng was not a child, and directly gave the drawings to Letai, and asked him to go back and gather the few Mo family heirs in the academy to study.

Putting down the hot air balloon for the time being, Xia Hongsheng still has to consider the bride price for Li Laoer.

The reinforced concrete city wall is very strong, and it is not easy for the existing stone throwers of this era to smash the city wall. Li Shimin wanted to have a way to destroy this kind of city wall, as if he was sure that Xia Hongsheng would definitely be able to help him find this way.

Because, Xia Hongsheng did not deny it.

In Li Shimin's view, with Xia Hongsheng's character, if it is something that cannot be done, it will inevitably be said directly, and if it is not denied, it will definitely be done.

Xia Hongsheng spread out a piece of paper in front of him and wrote three things on it.

Sulfur, saltpeter, charcoal.

All three of these are very easy things to come by.

By mixing it in a certain proportion, it will become a powerful black powder.

I remember that it seems that it is possible to produce ******** relatively safely by dropping glycerin into a mixture of nitric acid and sulfuric acid, branching it into a ********, and then dissipating heat through a cold water pipe, which is the kind of powerful explosive oil made by Nobel Prize who was later blown up.

Glycerin can be used to make natural oils and fats from animals and plants to make glycerin. It's a pity, what about nitric acid? What about sulfuric acid smashing?

It's easy to talk nonsense if the steps are too big, not to mention that my son doesn't know those things, so don't be too ambitious. So let's be honest - Xia Hongsheng pulled the ******** off the paper with a pen, and then circled the sulfur, saltpeter and charcoal.

In fact, gunpowder has been used in civil applications in China during the Spring and Autumn Period.

According to the record of "Fan Zi Ye Ran", Fan Zi Jiran said that "saltpeter comes out of Longdao". The first book that China has seen now records the formula of gunpowder says that "sulfur and realgar saltpeter are combined with honey", and the phenomenon of "flame rising, burning hands and burning houses" will occur. The "secret" here is a fake word, referring to the "honey" of honey. Because honey can be turned into charcoal when heated.

Sulfur and saltpeter are mixed with charcoal, and this is the recipe for gunpowder.

However, this recipe is not yet estimated to have come out, and in the original history, this recipe appeared in the records, and it was already nearly a hundred years after the Zhenguan period.

Gunpowder began with alchemy.

Alchemists often use the method of cauterizing sulfur, arsenic and other poisonous gold and stone medicines before using them, and "volt" means to subdue. Losing or reducing toxicity is called "fire". In fact, Sun Simiao will also do this, before he had a book of "Dan Jing Inner Sulfur Method", which was originally intended to be included in the Qianjin Fang, but unfortunately after Xia Hongsheng proved that the pill was poison, Sun Simiao burned this thing. Speaking of it later, Xia Hongsheng sighed - this is a good chemical exploration note!

It is also what Sun Simiao said, two taels of sulfur and saltpeter, ground into powder, and put it in a silver pot or clay jar. Dig a pit and put pots in the pit and on the ground, and fill it with earth on all sides. Light the three soap horns that have not been eaten by insects, then put them in the pot and set the sulfur and saltpeter into a fireworks. Wait until you can't afford to burn the fireworks, then fry the charcoal, fry until the charcoal is gone, then anneal, while it has not cooled, take the mixture, and this will be the fire.

Although the alchemists knew that the ignition of sulfur, nitrate, and carbon would cause a violent reaction, and took measures to control the speed of the reaction, such as burying them in a pit and filling it with soil, they did not know that they had inadvertently made an epoch-making invention.

Gunpowder was first used in the military, also in the Tang Dynasty, but not now. Xia Hongsheng knows this. Originally, the role of gunpowder used in warfare was to "fire", to "burn", not to "bomb".

For example, some flammable substances such as grease, rosin, and sulfur were tied to the arrows, and after they were ignited, they were shot with a bow to burn the enemy's positions. Later, gunpowder was used instead of general flammable materials, and the combustion effect was much better.

But now, under the influence of Xia Hongsheng, Datang already has gasoline. Gasoline attaches to the arrows of the bow and arrow, and burns better. Even gasoline is sealed in a jar, and a thick strip of cloth is stuffed at the mouth of the jar, which is ignited and thrown out to achieve an effect similar to that of ******.

So now, Xia Hongsheng's purpose is to reflect the power of gunpowder "explosion", which is also the main power of flames.

Gunpowder is easy to make, the key is to match the weapons used in gunpowder.

The Tang Dynasty was the origin of gunpowder, the Song Dynasty was the culmination of the progress of gunpowder technology and the peak of the frequency of firearm use, and the Ming Dynasty was the peak of firearms technology. In terms of the proportion of sulfur, saltpeter and charcoal, the proportion of the Song Dynasty is the closest to the proportion of ingredients in the black powder of later generations, and it is also the most powerful. However, Xia Hongsheng knew the secret of the greater black powder in the later generations - nitrate accounted for three-quarters!

Sure enough, everything is knowledge, thanks to those novels that stayed up late to read, and thanks to the thousands of people who know everything in those novels!

It's not in vain!

Thanks to this, Ben Gongzi can now also become an omniscient and omniscient cattle traverser!

The formula of black powder is not difficult, it is easier to obtain, but it is too slow to produce, and it lacks refinement, resulting in low yield, containing impurities, and weakening its power.

But who is this childe? Ben Gongzi is a traverser.,I forgot which novel I read it in.,I forgot the title of the book.,But the plot remembers.。 As mentioned above, in the 14th century, the technology of making gunpowder in France was very advanced, and it was the use of waterwheels to provide power to prepare gunpowder. When preparing gunpowder, the waterwheel is first started, and the gunpowder under the tamper is crushed by the power of the waterwheel, and then sieved through the elastic rod to obtain refined black powder with uniform texture.

Xia Hongsheng remembered one and wrote one down on the paper.

In the end, he wrote all the clues that he could think of together, and then sorted them out again and connected them to come up with a plan that could make Datang in the field of black powder in one step!

Xia Hongsheng carefully folded the paper and put it away in his personal place. This thing, as well as the various firearms derived and developed on this basis for practical use, will be destined to be the absolute lead of Datang to sweep the Eight Wilderness and sweep away Liuhe, and it is also destined to be the absolute secret of Datang's supremacy at this stage. (To be continued.) )