The news that the old dog brought back made Yun Yue fall into deep anxiety. The Donghu people have attacked, how many people will come? Now Pingliang is the time when the green and yellow are not available, and many injured soldiers in the first battle of Naitoushan have not yet returned. The recruits have just been recruited into the army, and the Yunjia infantry has very high requirements for the formation, which requires the non-commissioned soldiers to undergo strict training. If the defense of the city is over, if it is forced to go to a field battle. These newcomers were absolutely unsuccessful, and they were forced to sacrifice an invincible killing weapon by Yun Yue.

"Boom......!" After a loud bang, the fire burst into the sky and smoke billowed into the sky. The steaming black smoke was clearly audible for ten miles, and the birds and finches in the sky were so frightened that they flew around.

Lao Jiang was so shocked that he couldn't close his mouth, he was prepared for the new gadgets that Hou Ye came up with. But I never expected that it could be so powerful.

The carriage drove rapidly to the experimental area, and a ceramic jar was blown apart. The cattle and sheep tied to the side were all blown up in blood by ceramic shards, and many seriously injured were lying on the ground wailing.

Yun Yue looked at the cast iron, which resembled the style of a mine in the later generations, and couldn't help but sigh. The power of gunpowder was still insufficient, although he added egg whites to make black powder into gunpowder particles. The power of the explosion is still not enough to explode this cast-iron bomb. This is already the top-level gunpowder that I can make by myself. Without gunpowder, a weapon of mass destruction, I really don't know how to deal with those Donghu cavalry.

The fisherman and Master Geng, like detectives, took a magnifying glass to observe the wounds of cattle and sheep.

"It's winter, and the wool on the cattle and sheep is the thickest of the year. Look at this pottery shard, although it has penetrated the cowhide and embedded it in the ribs. But it didn't break the ribs, and the power was still not enough! Master Geng said with some disappointment.

"Hmmm! The lethality of ceramics is still insufficient, and the cast iron ones have not yet exploded. It's still not powerful enough, but it's powerful enough to frighten the Donghu people. The shrapnel is also scattered unevenly, you see this piece is so big that it doesn't even cut the sheepskin. The old fisherman picked up a large pottery shard, and there was not a trace of blood on it. It can be seen that the lethality is indeed very limited, and even the sheepskin has not been torn.

According to the report, the Donghu people are the same as the Huns. Most people don't have any armor, as long as they can blow up and wear leather robes. Moreover, the most powerful thing about this thing is that the debris from the explosion is widely dispersed. We don't want them to do much damage to the enemy's body, as long as they can blow up the blind eye. And it seems that this thing can also be used with kerosene, so the effect will be even better. "Old Jiang is upset for Yun Yue. Master Hou made such a powerful thing, but he was criticized by the two of you to be incomplete. I didn't see Hou Ye over there, and his face was about to drip water.

Yun Yue was holding the half-fried ceramic jar in his hand, and the strength of the ceramic was not as uniform as that of metal when it was fired. There was a big hole in this side, but only a few gaps were blown on the other side. There is no evenly dispersed shrapnel at all, what the fucking power can such a bomb have. Yun Yue couldn't help but be a little discouraged!

Originally, I wanted to use the principle of a grenade to make a grenade with a fuse. Just point it and throw it out, it seems like a complete dream now.

When defending the city, the oil is indeed useful. But this thing is volatile and difficult to store. And the consumption in the defense of the city is too huge, the last time the Black tribe attacked Pingliang. It almost used up the cool original Molotov ******, which was the fire oil that Yun Yue had stored for a year. Now the fire oil in Pingliang City can only be stored to that extent. If the Huns took advantage of the Donghu people's attack and then attacked Pingliang to that time, what would they do? When there was no way, Yun Yue had no choice but to drum out the gunpowder. In this hope, the Donghu army was massively injured. At the very least, we need to reduce some of our own casualties.

Gunpowder was made, but gunpowder was not explosive after all. After several experiments and improvements, the problem of insufficient power was exposed. Yun Yue and Master Geng pondered for a long time, but they didn't come up with a better way. Yun Yue regretted a little, why didn't she learn chemistry well in her previous life. If you get nitrate, acid, sweetness, and oil at this time (not that I want to hit it like this, this is to prevent the starting point from shielding.) Nothing else can be done, the grenade must be fine. If you make it bigger, throw it with a stone thrower. It is not much different from artillery shells, this kind of Warring States in the era of cold weapons. Facing himself with a hot weapon, that is the slaughter of Chiguoguo.

The old fisherman looked at the broken clay pot in Yun Yue's hand, and suddenly his eyes lit up and said, "Master Hou, will this thing erupt to the weakest part of the vessel?" In this case, we can deliberately make one side of the clay pot thinner. Then install nails inside, which can not only solve the problem of insufficient lethality of pottery shards. It can also kill and injure people in a larger area, and Lao Jiang said that this thing does not require killing and injuring the enemy. Just get your enemies wounded!

In terms of the situation on the battlefield, the howl of the wounded soldier can hurt the morale of the enemy the most. If this thing can explode at a height about the same height as a person, it can completely make everyone in front of him blind. You can wear armor on your body, but you've never heard of anyone wearing armor on your eyes. The old fisherman obviously found a breakthrough point, and talked about it with some excitement.

"The fisherman is right, but the clay is still not strong enough. There is no guarantee that it will not break, so it will be much less powerful. The old man had the idea of making a bucket out of cast iron, and then sealing one end with fish gelatin and kraft paper. Only by lighting the fuse at the back can the contents be ejected from the front. Master Geng twisted his beard, and suddenly his eyes lit up and said.

Yun Yue completely collapsed, the two in front of him were Warring States scientists, or monsters who had crossed over like himself. The thing they said had been widely used in the army in the Ming Dynasty, and it was called a fire gun at that time. If you dig deeper into this thing, the artillery will be freshly baked. You must know that this is the Warring States period, and it is still too weird to make a cannon.

The two brothers had obviously forgotten the dumbfounded Yunhou and squatted on the ground to make a gesture. By the time Yun Yue reacted, the two brothers had already taken out the straw paper and began to sketch on it. After a while, a fresh drawing appeared in front of Yun Yue.

The whole thing is square in shape, and the walls of the pipe are wrapped in heavy iron castings. Put gunpowder on the back, put a triangular nail on the front end and then the muzzle position, and seal it with kraft paper. It is not the slightest difference from the most primitive breech-loading guns.

"The front end should be round, and it has been made larger here to hold more gunpowder. The triangular nail is not good, why don't you change it to a lead pellet......" Yun Yue led the two old scientists of the Warring States into the ditch step by step. I don't understand that nitro, acid, and glycerin are not afraid, these two can be drummed out sooner or later. Yun Yue seemed to have seen the appearance of artillery capable of firing scattered shells at the head of the Pingliang city. In the Warring States period, this thing was definitely a weapon of mass destruction.

After an afternoon of research, it soon became dark. Yun Yue decided to completely let go of the research and development of military products, and there was no need for a doctor with two knives here. As long as they explain the general situation, and then say their own requirements, the two old fellows will soon be able to satisfy themselves.

"Master Hou, do you want to go to the Miao brothers to have a look." Lao Jiang is like a roundworm in Yunyue's belly, and the Miao brothers are the Miao people who were captured in Shu. They are good at taming beasts, but Yun Yue didn't let them domesticate any fierce beasts like wolves, insects, tigers and leopards. Rather, it is a full-time domestication of elephants and rhinos, and of course rhinos are easier to train. Yun Yue ordered someone to make a special bronze battle armor for the rhinoceros, and then tied the rhinoceros together with iron chains. One every twenty paces, the rhinoceros went on a rampage. It's a nightmare for any class. At that time, as long as you send troops to cover the killing, you don't have to think about it, it will definitely be a big victory. Yun Yue regretted that she hadn't trained this rhinoceros army when she first met Alexander. In Alexander's pure infantry phalanx, the rhinoceros would plough the ground with corpses.

If weapons such as spears can also cause damage to rhinoceros, rhinoceros in bronze armor is simply a giant beast of the wilderness. Ordinary things like crossbow throwers can't do any real damage to them at all.

Lao Jiang led the way, and Yun Yue followed Lao Jiang to the beast training ground. Whether it's a rhino or an elephant, they need a huge amount of feed every day. In order to make these elephants and rhinos physically strong, Yun Yue allocated mountains of corn and a large amount of hay to feed these ancestors. But thinking about the bowstrings they were about to make on the battlefield, Yun Yue felt that everything he did was worth it.

The elephants and rhinoceros are housed in a separate forest. Around the forest, a solid reinforced concrete fence has been built. The wall is trapezoidal like the city wall, and it is three or four meters high, and even elephants cannot easily escape.

In front of the mountain gate, there are two huge cement pillars, and three gates with steel thorns, firmly embedded in the pillars. In terms of sturdiness, not to mention elephants, even dinosaurs can't break through this iron wall.

From time to time, the sound of elephant cries sounded inside the wall, which sounded a bit like the imperial capital zoo in later generations.

Miao Long and Miao Yan stood at the door to greet Yun Yue, after a year of familiarity. They have become accustomed to a peaceful life, and now they do not want to return to the harsh mountains of 100,000 at all. No matter how good it is in the jungle, it is also a wild place. There is always not enough food to eat, if not for the fight for more land. The Miao people will not go out to help the Shu people capture Bashu. (To be continued.) )