After the meeting, Roland left Barov alone.

“You also see that the current chemical laboratory is a demander, a Greyburg industrial company, and I am going to mass-produce soap and perfumes, which also require a lot of manpower.”The prince said bluntly, "When most of the townspeople pass the primary education assessment, they get at least next year, and they are full, and they are six or seven hundred people, which is not enough."I need more people.”

“If you call from the fortress...”

"No," interrupted Roland, "when the city is built next year, the fortress will be connected to the town as a whole, which is equivalent to taking out the left pocket money and putting it in the right pocket, and I need more people outside the western border."

"This . . . Barov," said Barov, "I'm afraid it's not so easy to settle, and if you go to other cities to fish people, the local lords will not sit idly by."

"Don't go to the city," Roland put his finger into the cup, dipped some ice water, and rowed on the table, "I don't know if you have noticed that since the end of the demonic month, the gray castle has been in war."This included several attacks on the south by Tifeko, which led to the burning of Eagle City and the destruction of surrounding villages and towns.Then came the North, depriving the Duke of Ace of his title and territory of treason.Finally, this attack on the east side of the sea, "he hit the table twice, leaving a clump of water stains, "let the sea breeze county, the golden ears of the city, the castle of the jays are not small, not to mention the small towns around, the number of people who fled to the royal capital can see how heavy the loss is."

“You mean...” Barov made a thoughtful expression.

"Propaganda the West," the prince flattened the water, "in the past six months, only the West is in peace, there is no forced conscription, and there is no war attack."In particular, the first point — that Tifeko’s aggressive use of civilian warfare is certain to be conscripted and even carried over civilians everywhere — no one can guarantee that it will not fall on his own head next time, so a safe place torn from the fighting is the main point of our propaganda.”

"I understand," he thought, "that you intend to attract the common people of other towns and villages by not compulsively, without servitude, and at the same time providing shelter, food, and stable work?"

“Also,” Roland nodded with a smile, a sense of freshness and receptiveness, which had always been an advantage for the Chancellor’s Assistant, “and to focus on the propagation of the good treatment that literate people can enjoy, I think there will certainly be some desperate knights and nobles willing to come to the West to try their luck.”

Whether it is a village or a town, it is almost the territory of the small nobles.If you are in peacetime, even if the land is barren and no longer good, keeping a few acres of land can always fill your stomach.However, if the population loss during the chaotic period is serious, the days will be difficult to continue.At this time, there is a safe place, most people should be excited, anyway, even if the territory is not taken care of, it will not be occupied by others, and when the money and mercenaries go back to take over the territory, it is good to go back to take over the territory.

As for how to advertise, he believes that the other side has its own way.

“But in this way, the placement of these people is a cost, and the purchase of food cannot be interrupted,” Barov hesitated. “In case of any accident on the side of the caravan, the town hall coffers will soon dry up.”

Roland touched the chin, the most important task of the new political force is to establish prestige and confidence in the hearts of the people, if you suddenly fall into the dilemma of not getting paid, the good situation will turn sharply, "so, you go back to the plan first, wait until the caravan and the town to complete the next month's deal, the vault is full and then implement."

“Follow me, Your Highness,” Barov stroked his chest.

After the assignment, Roland returned to the office and began to think about how to complete Margari's balloon order.

The unit price of a thousand golden dragons is higher than that of the steam engine, but its cost is much cheaper, and the airbag is mainly drawn by Soroya, and the hemp rope and bamboo basket are all bargains.In fact, Roland has tried a simple sample in the courtyard of the Arsenal: a hydrogen ball that can carry lightning and Maisie can go to heaven at the same time.

After repeated consideration, he finally abandoned the hot air balloon scheme - gas needs to be obtained through distilled coal, the equipment is large, the manufacturing is also very troublesome, coupled with coal must be imported from other towns, small-scale production is extremely unsportable, far less convenient and easy to obtain than hydrogen.

The test product is made of a single-sided water coating, and the paper behind it is burned after painting, so that the entire airbag is almost light and has almost no weight, and the flexibility is also very good.In the test, the inflatable balloon is not afraid of rain, impact, fire, Maisie into all kinds of birds pounce on the gimmicks without leaving a trace, only with iron needles can be able to pierce this millimeter thick coating.Due to the extremely light weight, a hydrogen ball about five meters in diameter can carry an adult into the air.

The only difficulty is how to solve the problem of inflating high-pressure hydrogen bottles.

The DC motor used for electrolysis of water to produce hydrogen must not be sold, and a motor can inflate all hydrogen balls after connecting to the steam engine, which is obviously too cost-effective.If you want to continue to earn golden dragons from big dog owners, you must have high-pressure cylinders that can be repeatedly inflated.

The cylinder itself is not difficult, the material does not have wall thickness, with pig iron and cooked iron are OK, anyway, Anna is in, precision machining is not a problem.The key is inflating - the pressure of the next generation cylinder is above 20MPa, and it is undoubtedly impossible to enter by the gas cylinder, and the ten Kirin arms are useless, at least they have to get high-pressure air pump.If the pressure in the bottle is not enough, it is impossible to fill the hydrogen ball.

The high-pressure air pump is divided into piston pressure gas and turbocharged gas, the former belongs to the internal combustion engine technology tree, the latter belongs to the category of turbines, no matter which one is a time-consuming and laborious project.It wasn’t until late afternoon that Roland finally came up with the simplest solution: self-inflating the bottle.

This was inspired by a passing news: the vendors selling hydrogen balloons on the street used modified liquefied gas tanks to store the hydrogen, and the explosion turned out to be a tragedy.The reason is that the vendor directly uses dilute sulfuric acid and aluminum reaction to make hydrogen in the bottle, and no reaction amount is calculated, resulting in excessive pressure in the tank, which directly shatters the tank.

The way to self-inflate is to pour into the bottle sulfuric acid and lively metal to replace the hydrogen.The laboratory is commonly used in the laboratory is zinc, the most produced hydrogen by weight is aluminum, but neither of them is in this era, so Roland still intends to use iron to react - Lucia can separate the extremely pure iron mass, the problem of slow reaction at room temperature can be improved by heating and increasing the contact area (such as iron sheet, iron powder), and the coat of the coat can resist the corrosion of the acid to the bottle.

Think here, he immediately drew a simple sketch on the paper - in order to reduce the leakage, the high-pressure cylinder should be as a whole as possible, so the bottle body is full of one, leaving only a raised thread hole at the top, which can be spun into the air mouth with the valve.

After injecting the reactant from the hole, the cylinder is tightened, and these constantly generated gases have nowhere to go, and the pressure in the bottle can reach a very considerable value.As long as the valve is unscrewed when used, the hydrogen will flow out and rush into the airbag.Replenishment is also very convenient, remove the air nozzle, dry water, clean out the ferrous sulfate crystals inside, you can re-infused into the reactant.

Considering that dilute sulfuric acid is also a alchemical product, the inflatable price can not be set too low.

It must be in the fifty golden dragons, ten charge once, Roland thought.(Unfinished.)