"Heh, you are darker than me, the money has always been the selling price, and the official will give you three hundred dollars. Watermelons and melons are both at the same price, and the amount is negotiated with him. However, I advise you to go to Huangzhou first, and then load the car when you return. Wrap it carefully with straw and blankets, so it must not be exposed to cold or too bumpy. Three hundred dollars a piece is not cheap, and if you can get five of the ten melons back, even if you kid earns it. ”

Hong Tao didn't plan to make money with watermelons and melons at all, let alone go to the pit to support his caravan. At this time, he turned into a white angel, not only took the initiative to lower the price, but also pointed out the taboo of fruit trafficking, the loss rate!

This is also winter, it is easier to keep warm than refrigeration, if it is in summer, it is simply impossible to transport, and thousands of miles back are rotten into water, or rancid.

"The villain has been instructed by the lord to be the master of buying and selling goods. These red melons and those cucumbers are all gone, five hundred! It's all new coins, gold coins! "The sixth son is worthy of following Zhu Gongzi, and he has a certain understanding of the history of the Zhu family, and he has also heard of this concubine.

Since the pony is said to be a good thing, it must be, and it must not be. When you go back, as long as you say that you bought it from the horse, the master will not only blame it, but also get a reward, even if you don't pull it back.

"Hey, hey, sensible, promising. Go back and tell your master, in the future, bring less people who have no score out, making more money and earning less is secondary, don't make it difficult for the master's family. ”

Now Hong Tao can be sure that 100% of this caravan belongs to Zhu Bajin's family, otherwise there would not be such a ruthless heart. Especially after seeing his identity, the look in the eyes of this guy with scars on his face immediately changed, which was completely different from pure respect.

Hong Tao doesn't care about the rest, it is a few prisoners of war who are responsible for planting the greenhouse, and they will make each melon like a baby according to the requirements, and the slightest omission may lose this hard-won good job.

They all came from the First World War of Mawei City, and after two years of hard labor and transformation, they basically lost their danger, and they performed the best, so they were arranged to work in the greenhouse by Gao Yu.

Of course, farming is not easy, but compared to other jobs that are exposed to toxic substances every day, and can be burned, corroded, and poisoned at any time, it is simply heaven.

"What is the discipline in the lab?" Leaving the greenhouse, Hong Tao entered the small courtyard, where the children had already lined up to change their clothes, shoes and hats, and were waiting for orders.

"No orders not to touch anything, not to smell any bottles, not to take off gloves and hats, not to wander around...... The most important thing is to report the foul in time, and not to make mistakes again and again...... "The children recited the rules in a long voice, and the tone was very similar to Hong Tao, really learning from anyone, even the accent is like.

It is not Hong Tao who is lecturing to the children today, he is a second-hand chemist, except for formulas and ideas that have no reason in front and back, the details are really not as much as Gao Yu and they know.

But I don't know, I can't say I don't know, I have to say that the foundation of children can't use their own skills, and they can't understand it if it's too advanced, so it's enough for Wang Wudai to speak. This reason not only deceived the children, but even Gao Yu and they were convinced.

Leaving the children to Wang Wu to take care of, Hong Tao followed Gao Yu and Wang Si to another courtyard. This is the real laboratory, which is used to deal with more advanced tests, and the courtyard just now is just a basic laboratory.

"According to the method you said, I distilled the pure alcohol." Entering the laboratory, Wang Si took out a small bottle containing a colorless and transparent liquid.

"Well, that's right, find the original way and get more storage, and the officials will be of great use in the future. Come, Great, take this picture and go to where you can see if you can make it. ”

Gao Yu's original chemistry foundation is far inferior to Wang Si and them, but he can't stand his age, his understanding ability is high, and his hands-on ability is strong, and Wang Si is inferior to him in some aspects. For example, as long as he can draw glassware for experiments, it is not particularly complicated, and he can figure it out by any means.

Hong Tao asked Wang Si to make anhydrous ethanol, and asked Gao Yu to make a test vessel for preparing anhydrous ether. These two things are important materials for passivating cotton wool, and they are indispensable if you want to get ammunition fixed.

This is only the first step to go out, it is not enough to have a propellant, there must be a firing charge, and silver nitrate must be prepared in the future, and there is a long way to go. The main reason is that chemistry started slowly, and there is no urgency, so these children have to be slowly familiar with and explore.

Gao Yu's glass workshop has expanded many times, and the city cannot accommodate it, so it has been moved outside the city walls. There are also more than a dozen apprentices in the workshop, and the simple things basically don't need to be done by Gao Yu himself. No, it should be a mouthpiece, and most glassware is blown out.

"What does it smell like?" As soon as he got out of the West Gate, Hong Tao smelled an abnormal smell, a little sour, and irritating, and his nose itched after a few more smells.

"It should be the smoke from the soda factory in the west, and the wind will blow the smell in the winter, and it will be much better in other seasons." Gao Yu pondered how to blow the curved glass pipes on the drawings as he walked, and replied casually.

"Damn, no, you can scrape it from such a distance...... Wait, this thing is poisonous, go back and ask someone to take me over to see it. "The soda plant is built on a cliff to the west, guarding a small stream, and is where soda ash and caustic soda are made.

These two raw materials are in great demand in the industry, and the cost of purchasing soil alkali alone is too high, so they simply go to the Lübran method and directly use sulfuric acid, charcoal powder, limestone and salt to industrially produce sodium carbonate.

This method is simple, the raw materials are cheap and easy to find, and the output is large. But there is a problem, the Lublane process produces a toxic by-product, hydrogen chloride gas. It not only tastes bad, but also has a strong irritating and corrosive effect on the human respiratory tract.

The workers in the soda factory are basically prisoners of war, but prisoners of war cannot be consumed in vain, which is too inhumane. If you can't deal with Hong Tao, you will admit it, but if you can solve it, it's better to think of a way. After all, there are so many residents and merchants in Mawei City who are not prisoners of war, whether they are prisoners of war or ordinary people, this is wealth.

In fact, hydrogen chloride gas is still very useful, and you only need to find a way to dissolve it in water to get a very useful basic chemical product, hydrochloric acid.

There is no need for Hong Tao to think of the solution, the French in the nineteenth century have already given the perfect solution. Gases from the chimney are introduced into a coke-filled tower, using the coke's numerous pores to increase the contact area.

If water is poured down from above, a large part of the hydrogen sulfide gas will be dissolved in the water, and then hydrochloric acid of different concentrations will be formed. If the process is mature enough, the concentration is still adjustable.

"This is hydrochloric acid? It's amazing...... "Ten days later, a simple coke tower was built. It's still small, and it's just used as an experiment.

But the effect is not bad, after Gao Yu looked at the test paper in his hand showing a strong acid color, Hong Tao was basically a god in his eyes. The toxic and useless waste gas was simply transformed by my husband, and it turned into a very useful chemical raw material.

"It's all right, this official has something to do this time. Go and get the kids together and show them the power of chemistry too. Let's get rid of these exhaust gases first, and then we'll get busy with other things. Hong Tao was also very happy, this was the first time he had used this method to make hydrochloric acid.

I didn't think of playing this thing when I was in the Golden River Empire, mainly because the chemical factories at that time were far away from the city and were built in the tropical rainforest, and the air humidity was high, and the smoke couldn't drift that far at all.

In the winter, people are in Maodong, and the soda factory in the west of Mawei City is in full swing. Next to each soda furnace is a sturdy shelf made of wood and metal fixtures, on which a wooden tube is propped up that is significantly thicker than the chimney, as if a muffler had been put on the chimney.

But this device is not silent, and the only thing that changes when the chimneys put it on is that the smoke is lighter, whiter, and lighter, and other than that, it doesn't seem to be of much use.

Not only was it useless, but the prisoners of war had another job, which was to use water presses to press water into the cylinder in shifts, but it was forbidden to touch the liquid flowing out of the pipe under the cylinder. In fact, no one touched it, and the liquid smelled so bad that I couldn't open my eyes when I got close.