The production price comparison of the lead wire is simple, the fine hemp silk is soaked in potassium nitrate solution and then dried, and then wrapped in some gunpowder powder and kneaded into thin strips.

After carefully tinkering for half an hour, seven or eight of the simplest clay pots and earthen bombs were ready, and finally Chen Xu picked up the label, wrote the logo according to the different gunpowder, and carefully put it in a rattan basket after pasting it, and then raised it and beckoned Sun Shujiong to go out with him.

The office of the Academy of Sciences is located in Xianyang City, so naturally the explosion test cannot be messed around, otherwise it may cause panic.

Escorted by more than a dozen guards of the forbidden army, Chen Xu took a carriage out of the city and came to the edge of the Wei River.

The weeds and trees by the river are withered, there is a thick layer of snow on the ground, stepping on it makes a creaking sound, the river has been frozen for many days, because the weather is cold, no one can see the whole Wei River for several miles, except for some jackdaws and wild birds, the world is lonely and empty, even the wild dogs can not see one.

"Tinima's cold!" Chen Xu lifted the thick curtain and got down from the carriage, the cold wind poured along the neckline and into his neck, his body temperature dropped several degrees in an instant, and he couldn't help but hit a few swings in a row, covering his mouth and nose and rubbing his hands and feet, and at the same time ordered a few guards to pick up some hay and branches and raise a fire.

After looking around for a long time, I chose an open and sheltered place on the bank of the river.

Chen Xu picked up an earthen grenade and instructed Sun Shujiong: "Record, No. 1 gunpowder formula grenade explosion test!" ”

"Yes, Master Hou!" Sun Shujiong hurriedly opened a wooden folder, dipped a brush in a small gourd with ink hanging from his waist, and quickly wrote down a line of words.

"All retreat, leave twenty zhang!"

Ordered the guards to leave twenty zhang away, Chen Xu carefully put the grenade in his hand on the ground, then picked up a burning wooden stick and lit the fuse, watching the fluttering sparks start to burn, Chen Xu quickly dropped the wooden stick and turned his head and ran.

Ran to Sun Shujiong and a group of guards in one breath, and then Chen Xu stared at the position of the grenade without blinking, where he could still see a puff of green smoke rising continuously, which looked extremely conspicuous in the snow.

Sun Shujiong and a group of guards didn't know what Chen Xu was doing, looking at Chen Xu's nervous appearance, although they all remembered the rules of the Academy of Sciences, they didn't ask what they shouldn't ask, and didn't say what they shouldn't say, but they all looked at the smoking place with nervous expressions, and they were all puzzled in their hearts, I don't know why Hou Ye used fire to light a crockpot today.

Two minutes passed.

The burning green smoke seemed to be beginning to dissipate.

Just when Chen Xu thought that the lead was extinguished, a sudden loud bang exploded in the snow, and the moment the fire and smoke rose into the air, the ice, snow, soil, gravel, and withered grass splashed in all directions, and the ground trembled slightly.

Although it was twenty zhang away, there were still a lot of broken stone pottery pieces that fell near Chen Xu and others, and at the same time as the explosion sounded, more than a dozen war horses were all screaming and fleeing in all directions, and the four horses pulling the cart were even more chaotic, and the carriage was dragged over, and more than ten guards and Sun Shujiong were all frightened, most of them fell directly to the ground and screamed in horror, and only a few dared to grab Chen Xu and drag him away.

"Stop~" Chen Xu shouted with tears and laughter, but he was still dragged out more than ten meters away before stopping.

"What are you running, the sound of a loud fart is scared like this, go and get the horses back!" Chen Xu broke free from the guard's hand with a smile, sorted out his clothes and hat, and then pulled the pale-faced Sun Shujiong up from the ground, and pulled him to stagger towards the location of the explosion.

Although the explosion looks a little terrifying, it does sound a little exciting in this kind of empty wilderness, and the scene of slush and earth and stone splashing is also good, but in Chen Xu's opinion, the sound is similar to the firecrackers that shake the sky and thunder in later generations, as for the power, Chen Xu can probably judge it, and it is estimated that it will not be particularly powerful.

Sure enough, when Chen Xu walked to the place where he put the crockpot grenade just now, a dirt pit with a diameter of about one meter appeared in front of him, the central position was about twenty centimeters deep, and there was still cyan smoke curling in the soil pit, and the air was filled with a strong smell of gunpowder after the explosion of firecrackers, and the thorns and weeds within two or three meters of the surrounding area were broken a lot, and the range of the impact was about five meters in diameter, and five meters away, except for a large amount of mud and ice and snow that was kicked up by the explosion, the weeds were very few broken.

"Record, No. 1 gunpowder is three taels, the explosion is fully burned, and the effective killing radius is one zhang in the state of no shrapnel!"

"Good...... Okay......" Sun Shujiong hadn't woken up from the shock of the explosion just now, not only his legs and stomach were trembling, but even the hand holding the pen was constantly trembling, and he was scared to the ground just now, and the ink from the gourd containing ink stained half of his clothes black but he didn't know it at all.

Seeing Chen Xu go to observe the explosion without fear, a group of guards also slowly calmed down, looking for horses, looking for horses, carrying carts, and waiting for the final count, only to find that more than ten horses had run away in shock, and even two of the four horses pulling the carriage broke free from the reins and didn't know where to go.

When Chen Xu knew the situation, he couldn't cry or laugh even more.

Later generations to the age of firearms, war horses still appeared on the battlefield for a long time, from the Song Dynasty to the anti-Japanese period, war horses have never disappeared from the battlefield, but to adapt to the hot weapon battlefield of artillery fire, war horses must be well trained, and even have to use some methods to reduce the explosion and fire and other frightens of horses, and in this era, even human beings are frightened by this sudden thunderous explosion on dry land, let alone horses, livestock.

So Chen Xu arranged for the guards to set all the horses and carriages back twenty zhang again, and then each horse grabbed the reins, and then picked up a grenade and lit the fuse again in another place.

"Boom~~"

Two minutes later, with a loud bang and a burst of fire and smoke in the air, mud, rock, ice and snow splattered all around, and the second grenade was successfully detonated, which seemed to be louder than the first, and judging by the sound, it seemed to be more powerful.

"Record, No. 2 gunpowder is three taels, the explosion is fully burned, and the effective killing radius of no shrapnel is two feet!"

"Boom~~"

More than ten minutes later, a third test grenade was detonated, accompanied by the sound of explosions and smoke and fire.

"Record, No. 3 gunpowder three taels, the explosion burned insufficiently, the power was insufficient, and the preliminary suspicion was that it was a coagulant ......"

……

The weather is freezing and covered with snow, for the people of Xianyang City, this is a time to hide at home and cats in winter, except for slaves and subordinates and people who have to work, most of them are hiding at home, there are few pedestrians on the street, and even the forbidden soldiers who carry out patrol tasks are much less.

Literati and scholars all gathered in various gardens to play and play, princes and nobles and merchants all watched the performances of singers and dancers in their respective mansions, and when they were interested, they also hugged the charming concubines to do some entertainment activities that were not suitable for children on the warm kang, and the whole Xianyang was immersed in a peaceful and peaceful atmosphere.

But with the sound of thunder coming from outside the city one after another, many people couldn't help but be frightened, and they got dressed and went out to watch and find out why there was continuous thunder in the cold winter wax moon.

In the palace, Qin Shi Huang was in the palace, I don't know how many times he had brushed the god list, but when the first thunder came, he put down the book and arranged for someone to go out of the palace to investigate the situation.

Because the thunder came so strangely.

And this wait was nearly half an hour, and in this half hour, five or six thunderclaps came one after another, although some were big and some small, but in the silence of the palace sounded extremely clear, and the continuous thunder also made him feel uneasy, and he didn't know what was going on.

"Hurry up~ Thunder is coming from outside the East City!" A team of forbidden soldiers rode their horses to break the ice and snow on the street and roared towards the east city gate, and soon passed through the city gate, until they rushed to the edge of the Wei River, and saw more than ten guards leading horses and waiting quietly, and just when they arrived, suddenly another thunder sounded by the river, the fire and smoke rose into the air, the mud and stones splashed and the ground trembled, the terrifying sound and the moment the fire exploded, the horses ridden by the forbidden army were frightened and turned around and neighed and galloped, and many forbidden troops were directly turned upside down from their horses.

"What happened?" Shi Chang, who had been thrown off his horse, rushed to the carriage with a muddy head and yelled.

"Don't be impatient, Qinghe Hou is testing Taiyi Divine Thunder!" A Praetorian guard said comfortingly with a calm face.

"Too ...... Taiyi Shenlei? The head of the forbidden army suddenly looked sluggish.

"Yes, wait quietly, don't make a noise, arrange people to be on guard all around, don't let irrelevant people approach, you can't afford to spoil the big thing of the Hou Ye!" A burly Praetorian guard looked at Shi Chang and said.

"Yes, yes~" Shi Chang panicked and wiped the cold muddy water on his face with his sleeve, and then turned around and loudly scolded his subordinates to disperse and start to be vigilant, because at this time, when the east city gate was out, there were already many people running out, and the target was the river bank.

Soon after the arrival of this forbidden army, several groups of soldiers belonging to different prefectures came one after another, including lieutenants, guard lieutenants, and even the private guards of various princes and princes.

"Spread out, Xuanwu Wei urgently inspects! Death to the blocker! With a few angry shouts, a team of black-clothed Xuanwu guards galloped out of the city gate on high-headed horses, and came to the river in an instant, but after they figured out the origin of the thunder, they all looked at each other in horror at Chen Xu and Sun Shujiong who were running around by the river.

"Boom~~"

The last homemade grenade was ignited, and with the flames and thunderous explosions that rose into the air, Chen Xu's gunpowder explosion test was completely over.