Last time, I said that Zhu Youxiao easily created a "Luban gun" (machine gun) with magic, and after the demonstration on the spot, I found that the effect was shocking!

"Material-consuming? How much does it cost? At most, it's just equivalent to the copper and iron needed to build an artillery, isn't it ......" Zhu Youzhen was excited, and suddenly thought of something, so he asked: "Could it be that the consumption of 'gunpowder' is too great?" So unsustainable? Or is it that strafing all over the sky is not cost-effective? ”

"Haha, my brother is too worried." Zhu Youxiao said embarrassedly: "This 'Luban gun' requires at least three people to be responsible for loading ammunition at the same time, but only one person needs to aim and shoot." Although its power is almost equivalent to that of a 'new army' in a group of 100 people, the consumption of ammunition is obvious to all, and I am afraid that it will have to set up a special arsenal to produce special ammunition! However, if this 'Luban gun' can be popularized in the army, then whether it is the new army, the border army or the naval division, the combat power will immediately increase dramatically! ”

"Giggles, Your Majesty, Uncle is right, and our family is not short of money!" After the sister-in-law, Queen Zhou, and the sisters nodded, and then they also joined in with a grin: "According to what Uncle Fang Cai said, the key to whether this 'Luban gun' can be popularized in large quantities is probably the problem of its ammunition supply, right?" ”

"Haha, sister-in-law is reasonable." Zhu Youxiao sighed: "To be honest, the key to making ammunition is to make gunpowder, and the key to making gunpowder is to boil saltpeter. As far as my brother currently knows, the world's saltpeter output is only 100,000 catties per year, and most of them come from Hanzhong, Bashu and other places, and it is troublesome to boil. ”

In fact, the basic ingredients of traditional Chinese "black powder" are saltpeter, sulfur and charcoal. Sulfur can also be replaced with realgar, charcoal can also be replaced with grease and asphalt, but the production of this "saltpeter" has never been increased, because the ancient "saltpeter" is all boiled by professionals ("nitrater").

Therefore, the key to the invention and application of gunpowder is the identification and performance of "saltpeter" (also known as "flame nitrate"), as well as the progress of processing and purification technology. The ancient Chinese knew how to use "saltpeter" very early, which was originally written as "stone", and was used as medicine during the Warring States, and its chemical composition was potassium nitrate.

"Saltpeter" in nature is often formed by the decomposition of nitrogen-containing organic matter in the soil, oxidized into nitric acid under the action of bacteria, and then combined with potassium in the soil. Therefore, in the crisp autumn season, it usually precipitates out in the form of a crust or salt flower, covering the ground, the foot of the wall, the toilet, the rock wall and other dark and dry places, which is the so-called "frost". Especially in the corners near pigsties, stables, and toilets, there is a lot of urine near them.

The "nitrate" people sweep this kind of nitrate-containing clods, put them in barrels, soak them in water to dissolve, filter them, and then boil or dry the filtrate to get "saltpeter crystals", which is a kind of "potassium nitrate" with high purity. In addition, it can occasionally be found on certain rock faces, caves, or salt marsh areas.

Therefore, in order to increase the production of "saltpeter", the ancient "nitrate" even collected human and animal urine everywhere and used it to splash it on the dark, ventilated and dry rock wall, and a thick layer of "ground frost" would grow every three or five days. However, if urine is repeatedly spilled at the same location, it will be found that the "frost" production will decrease. At this time, if you can sprinkle a layer of "plant ash" on the rock wall, wall corner and other dark and dry places, and then splash urine after ten days, the production of "ground frost" will surge.

According to its "fossil" nature, it is known that it is a crystalline body precipitated in water, which is probably "saltpeter", because the "solubility" of potassium nitrate "saturated solution" at room temperature is very high, but it will decrease sharply as the temperature drops. At this time, there will be a lot of "precipitation" in the potassium nitrate solution, and after filtering and drying, potassium nitrate crystals with high purity can be obtained.

"Oh? So, according to Uncle, how to solve this problem of 'saltpeter production'? After hearing this, the girls were very curious, and they all blinked their beautiful eyes and aimed at Zhu Youxiao and Zhu Youzhen brothers. ———— "uh...... This one...... I'm afraid I really have to ask Shizun his old man, hehe. ”

"Ask 'Master Guoshi'? Good! Let's go inside! Emperor Chongzhen and his concubines saw that Zhu Youxiao actually "picked a mule", so they did not bother him to continue to develop "new weapons", so they shook their bodies and disappeared out of thin air, and when they reappeared, they had come to the main hall of "Xian'an Palace", and happened to see the carpenter meditating cross-legged on the main seat and refining qi. However, in the position of his left and right hands, it is his 12 daughters to be married, sitting opposite each other and spitting and refining qi.

"I've seen my father-in-law! I've seen the predecessors of the national teacher! Zhu Youzhen and his concubines hurriedly stepped forward and bowed and saluted: "Just now, the little son-in-law saw his brother tinkering with a special firearm called 'Lu Ban Gong' at the door, and saw that it was multi-eyed, powerful, and exquisite, and wanted to vigorously promote it to the army on a whim, but the 'saltpeter production' was limited, and I am afraid it would be difficult to do what I wanted, so I came to ask the national teacher and father-in-law for advice, I don't know if I can give me some guidance?" ”

"Haha, boy, you are now a 'Jindan real person', and you have to enjoy a thousand years of longevity, why bother with mundane things?" The carpenter still closed his eyes and recuperated, and said expressionlessly: "Although the 'Lu Ban Gong' is invincible, it can't wait for the 'Jindan Vision', but it can cause trouble for the 'Qi Refining Spirit Disciple' and even the 'Foundation Building True Cultivation', which is considered to have some merits." However, it is not recommended that you be too distracted by mundane things, and it is better to cultivate the true qi and subconscious spirit, and find your daughter-in-law. ”

"Uh...... Looking for a daughter-in-law? This ......" Just when Emperor Chongzhen Zhu Youzhen and his nine concubines heard it inexplicably, I saw that the nine "young sisters" who had a marriage contract with them suddenly opened their beautiful eyes, and after looking forward to it, they giggled and said: "Brother Emperor, sisters of the concubines, you are so Yaxing, you are just concerned about making people in a hurry, how long have you not come to see our sisters?" Cluck. Although the women are very young, they have already budded after several "Daigo empowerments".

"Uh...... This one...... The concubines laughed, isn't it because you are too young to have sex together? Otherwise, I, oh no, my husband would have let you experience what real male and female pleasure is? Hey. Zhu Youzhen has been looking forward to seeing the right time to marry each other to break the melons one by one.

"Seriously! In front of the public, what kind of system is it to say something inconsequential? The carpenter grimaced and reminded, "What are you asking?" ”

"Saltpeter! The son-in-law urgently needs a large amount of 'saltpeter', but the production is insufficient, I don't know ...... father-in-law "————" hum, why is this difficult? Hongu told you. ”

The strange voice that came suddenly sounded, and it was actually the nine little sisters who had fused into a three-zhang tall "giant girl" at some point, and looked down at Zhu Youzhen and his concubines with disdain, and said expressionlessly: "Widely planted cotton, defatted and nitrated, you can get 'fire cotton'." ”

"Huh? Master! What are you...... The apprentices greet the master. Zhu Youzhen and his concubines saw that "urging no brother" appeared out of thin air, so they hurriedly saluted: "Cotton? Celloidin? This...... Dare to ask Master, this ......" Before the words fell, the "giant girl" urged her brother to flick her fingers and hit the other party with a white light.

"Your Majesty? The emperor fainted! Come on! Save the Emperor! Woo woo...... "————" hum, what are you crying about? The kid woke up right away. ”

As soon as the words of the "giant girl" urging her brother fell, I saw Emperor Chongzhen, who was lying in the arms of Queen Zhou, under the operation of the concubines shaking their heads and hugging their thighs and pinching people, they really slowly opened their eyes, and obviously woke up. However, he suddenly felt that there were a lot of strange memories in his mind.

These "weird memories" are the result of the "giant girl" urging her brother to establish "information sharing" with her deity "Nujiale" with the "long river of fate", and only through countless "interfaces" and "time and space" can they come across dimensions, and get the method of how to make "cotton wool" and make "ammunition", which is simply wonderful!

In the impression of later generations in different time and space, "fire cotton" can be made into the cheapest "explosive", because its "scientific name" is called "nitrocellulose", which explodes when it encounters an open flame or high-temperature combustion, and the high-temperature gas produced even reaches 40,000 or 50,000 times the original volume, which can be called "high explosive"!

The production of "cotton wool" is very simple, as long as the "absorbent cotton" is soaked in the mixed acid of "concentrated nitric acid" and "concentrated sulfuric acid" for half an hour, and it becomes "cotton wool" after being dried after being fished out. As for how to degrease the harvested cotton? It's actually quite simple. The method is to first tear the cotton harvested from the cotton field, pick out the visible impurities, such as small stones, dead leaves, etc., and wash the cotton repeatedly with clean water until the water comes out of the water appears clear.

Then, put the cotton in an enamel pot, add water until it can just be submerged, and then add "caustic soda" or "caustic soda" or "caustic soda" (NaOH) equivalent to 2% ~ 5% of the weight of the water to the pot, cover and boil, simmer for 10 minutes, take it out for cooling treatment, that is, ventilation and cooling.

Finally, rinse the cotton with plenty of water, and rub it for 10 minutes while washing, and then put the washed cotton on clean paper to dry.

In this process, special attention should be paid to the "caustic soda" or "caustic soda" has strong corrosiveness, you must wear leather gloves and animal skin around the waist to protect the skin, if it is stained on the skin and causes burns, you should immediately put it down in the vinegar tank to wash your hands, and then wash it with water, so as not to cause long-term burns on the skin, resulting in the image being ruined.

However, during the "degreasing" period, the boiling time of cotton should not be too long, so as not to reduce the degree of polymerization and affect esterification, and pay attention to dust prevention when drying.

"Fire cotton", simply put, is to add glycerin to the "absorbent cotton", but after the "esterification" and "vulcanization" of the mixture of "concentrated nitric acid" and "concentrated sulfuric acid", it itself has become a "new gunpowder" that burns several times more violently than "black powder", because it is a white fibrous substance, although the physical properties are basically the same as cotton, but the explosive power is several times greater than that of black powder, and it can be used for military purposes in ancient and modern times, so it will be called "fire cotton"!

However, the speed of detonation of the "cotton wool" was too fast, even higher than that of the "yellow explosive". If "bullets" and "shells" are made directly from "fire cotton", they are prone to misfire, and they will explode even before the barrel is fired, is that tantamount to suicide by exploding?

Since "fire cotton" is very unsafe, it is not easy to make a conventional explosive with stable performance. However, if it is treated with an alcohol-ether mixed solvent and rolled into shape, its detonation speed can be significantly slowed down, and it can be used as gunpowder for guns, shells, and even rockets.

The reason why "fire cotton" is unstable is caused by the different amounts of nitric acid contained in it, and the improvement method is to first wash the "fire cotton" in "alkaline water" and then dry it. At this time, "alkaline water" can generally be replaced with "lime water", and occasionally a clear solution of "plant ash" can also be used.

The "fire wool" made in this way has good stability and is relatively loose, and can be used to make explosives, but it cannot be directly loaded, and it must be soaked in "fire wool glue" for a period of time, and then taken out to dry. The so-called "collodion" is a "protective film" produced by "collodion" in "alcohol" and "ether".

The chemical name of "alcohol" here is "ethanol", which can be replaced by highly strong liquors in ancient times, such as the "Sanjian Dui Flower Wine" produced in Guilin, Guangxi, also known as "Guilin Sanhua Wine", with an alcohol concentration of more than 52%, which was once one of the imperial wines of the Ming Dynasty court, and was paid tribute to the royal family all the year round, and has a certain reputation.

As for "ether", it is a volatile, flammable and anesthetic colorless and odorless liquid produced after the chemical reaction of "alcohol" and "concentrated sulfuric acid", which is equivalent to a certain "ecstasy", which can easily stun people by inhaling a small amount, and it is necessary to cover the mouth and nose with a wet cloth with alkaline water when making.

Therefore, the ancients only need to mix a large amount of spirits and concentrated sulfuric acid in the large clay vat according to the amount of one to one, and the "collodion glue" solution that can be obtained will be soaked in "alkaline water" and put the dried "fire cotton" into the large clay vat to continue soaking for half a day, and then take it out and dry it to get the stable "cotton dynamite", which is not afraid of failure due to the return of the weather and even rain infiltration, and does not have to worry about the expiration of the time after a long time, and the power is huge!

Because the "solvent" in the "collodion" solution will be deeply soaked when soaked in "collodion", and will volatilize and form an "elastic film" when it is fished out and dried, it is conducive to industrialized mass cheap production. However, in order to produce "cotton dynamite", the first thing is to have enough "sulfuric acid" and "nitric acid".

In ancient times, the ancients wanted to make "sulfuric acid" and "nitric acid", by making a "clay stove" similar to a "bellows", the smoke produced after the "sulfur" or "saltpeter" was fully burned in the "clay stove" was forcibly sucked away with a "bellows" and filled into a large clay tank filled with clean water, so that the sulfur dioxide and nitrogen trioxide gas in the smoke were integrated into the water as much as possible, and "sulfuric acid" or "nitric acid" was formed, or "mixed acid" was formed in one step.

Moreover, the longer the smoke enters the water, the higher the concentration of the "acid" produced, until the white paper can be dehydrated and carbonized and turned black, which is a "strong acid". At this time, it can be used to make "cotton dynamite". This is Zhu Youzhen's magic method of making gunpowder after being instilled by his master "Giant Girl" and his younger brother!

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Haha, thank you for your attention, collection, recommendation, subscription and review of this book! As an author, I am very happy and honored to provide readers with a novel that meets the needs of the general public. As the saying goes, "Life is short, but the tip of the pen is slender." "Therefore, the road to cultivation is long, where to find immortality? There is nowhere to go for troubles, and read the people in the book! I hope that the novel "Heaven and Earth Let Me Go" series can bring happiness and insight to everyone!

This story is pure fiction, if there are similarities, it is a coincidence! Friends, the part-time job is hard, the time is urgent, the creation is not easy, like the collection, by the way, forward, want to know the plot? Next time I break it down! ("The book has its own golden house?") There are thousands of bells in the book? There is Yan Ruyu in the book"? Welcome to my book)