Cheng Wenying said with a smile: "Then please ask Mr. Zhang to draw up a plan quickly. Oh no, I'll also recruit two capable shopkeepers to work together and make new account books for each of the two families."

"If you encounter any problems in the process, you can ask your wise nephew for advice. After making sure it is foolproof, Mr. Zhang will send this method to the court."

Shopkeeper Zhang cupped his hands and said, "It is more appropriate for Grandpa to be meticulous."

After things were arranged, Su You could finally get away and head to the blacksmith shop.

When they arrived at the blacksmith's shop, Shi Tong acted really quickly. He was probably in the same den as the tax inspector, and the green vitriol was already prepared.

The component of green vitriol is ferrous sulfate heptahydrate crystals. Grind it into powder and add vinegar to distill it. You will get a traditional Chinese medicine and pungent gas.

The thing condensed out of this gas is called green vitriol, which is actually sulfuric acid.

Su You was tinkering with experimental equipment here, while Shi Tong was over there waxing rulers, set squares, vernier calipers, etc. and carving out scales.

The distillation equipment works well. The ceramic stopper of the condenser tube and the mouth of the porcelain bottle have an effect similar to frosted glass. As long as the taper is consistent, the sealing effect is very good.

The liquid and gas in the condenser tube entered a porcelain basin filled with water. Soon, Su You produced a small basin of sulfuric acid.

This basin is made of dilute sulfuric acid, mixed with some bile vitriol, which is copper sulfate crystals, and the etching solution is ready.

Then it was condensed in a basin again, but this time salt was added to the green vitriol, and what was obtained was hydrochloric acid.

Hydrochloric acid drips directly from the condenser tube and is collected, and the concentration is relatively high.

With hydrochloric acid, lead, graphite, and Su oil, DC batteries can be made.

It may not work for anything else, but if it's used for etching, there's no problem at all.

Just do it. Red copper has excellent ductility. He asked Shi Tong to knock out two pieces of copper wire, tie copper strips and graphite strips to the magnetic rod, and use them as the anode and cathode of the lead-acid battery. One wire was connected to the one to be etched.

On the measuring tool, one wire is connected to a piece of copper.

Immerse the part that needs to be etched below the etching liquid surface, leave the rest on the liquid surface, light a stick of incense, and lift it up from time to time to check the etching effect.

Shi Tong was shocked by this series of sexy actions. He prayed silently to Xiang Xiang and muttered something.

Su You rolled his eyes: "That's just a timer. It's not for you to pray to gods or Buddhas. If you have an hourglass, that's fine... OK, done!"

Wash the tools, throw them into hot water and boil off the remaining wax, and a pair of shiny triangles is made.

Shi Tong shook his head in front of the triangular board and kept applauding: "Amazing skills! Master's amazing skills! This rune is so delicate! It cannot be achieved by carving."

Su You couldn't help but complain: "What runes, those are numbers!"

Shi Tong didn't take it seriously: "Master, hurry up and get that trick out of me!"

Su You said happily: "This set is yours, the experimental product. Now that the process has been completed, it will be mine next. Hahahaha..."

After laughing, he added: "The work is not over yet. Next, we need to make an angle ruler. I will leave this to your shop assistant. Come with me to draw the drawings."

The two masters and apprentices worked hard until dinner time. The ruler, set square, protractor, and compass were all ready.

It is worth mentioning that the compass, where the two legs meet, uses the gear principle, the handle of the compass uses threads, and the clamp that holds the compass legs and pencil lead also uses thread adjustment.

This is already Shi Tong's best craftsmanship, but the whole object is still a bit big. The length of the compass angle is more than a foot, and the diameter of the screw is about three millimeters. Compared with the fine threaded accessories of later compasses, this compass is more

Like a wacky bicycle model.

As long as it can be used, Su You comforted himself, but Shi Tong packed the whole set of things with great care and called the waiter: "Hurry up and send this set of things to the fourth master at home!"

After everything was done, I had to drag Su You along, saying that I wanted to give him a taste of good food.

Su You was greedy and looked forward to it very much, but when the waiter brought the things over, it turned out to be a pot of beef jerky and a platter of braised pork.

Qiaojie beef is the dock workers' name for beef soup in Yipeng.

There were no seats at the charity shed, and the diners were not very particular. They spent a few pennies and took a bowl of beef offal, and sat casually on the stone steps of the pier, with their feet up and feasted. When they got off the boat and looked up, they were all

If you lift up the soles of your hemp shoes, you might as well call them "beef with raised feet".

Ba Niang still told Su Youyan this matter as a funny story.

The braised pork platter is another ingredient, pig in water.

People in the Song Dynasty did not eat blood from the head and feet, and it was something no one wanted. A big pot of braised food mainly costs money for the powder and labor for washing the ingredients.

However, the braised meat produced is indeed worthy of praise.

Su You suggested to Baniang that the price of this thing should be a little higher, at fifteen cents a plate, so it could be considered a holiday thing for the poor.

Su You tapped the pot and plate with his chopsticks: "Disciple, you must be punished! I invented this thing, and now you are using it to fool me? Your table looks lively, which is worth less than fifty cents.

thing."

Shi Tong chuckled and said, "I come from a general in the Shi family, and I don't have many taboos when it comes to food. I won't let go if it's delicious. It seems that Master is also a member of my generation!"

Su You picked up a piece of pork head meat with chopsticks and put it in his mouth: "The brine is still too new and not soft enough, but overall it's pretty good. Come and eat and chat."

The two of them sat down, and the master, unlike the master, and the apprentice, unlike the apprentice, ate and stuffed themselves.

After eating half full, the two began to slow down and talk.

Su You asked: "What is the general situation of the industry in Meishan City?"

Shi Tong said: "The four families of Su, Cheng and Shi Shi, in addition to chewing grains in Zhuangzi in the countryside, mainly relied on trade to establish their businesses."

"We, the Shi family, were born as generals, so the slaughtering, smelting, and gold and silver imports and exports are all in our hands."

"The Historian family controls the ceramic industry, the Su family controls silk and fabrics, and the Cheng family controls printing and herbal medicines."

"These are the main businesses. As for the others, they are either the children of common people in the family, or they have other surnames, but they are not the majority of Meishan City's business."

Su You asked: "What about transportation?"

Shi Tong said: "The transportation is mainly carried out by the Jiangqing family in Jiazhou, where several major rivers intersect and the shipbuilding industry is developed."

Su You then asked: "What about the land route?"

Shi Tong said: "The land route is troublesome. They are all coolies. We formed a caravan and camel team and traveled across the mountains to Dali, Qiang Village, Guifang, and traded with the barbarians. All we earned was hard money. Our Jiangqing family

They are sitting on the ground and not participating."

Su You nodded and had a rough understanding of Meishan City's economic layout.

Shi Tong said: "In terms of money and strength, the Cheng family is the first in Meishan. Printing books is really profitable, but labor is very expensive, and they must be people who are proficient in arts and sciences. Engraving also requires several generations of accumulation before they can do it. There is no one who can do it for many years."

A family that is good at writing skills will not be able to make ends meet."

Speaking of this, Su You couldn't help but admire him: "That is, the two Jinshi scholars in Mr. Cheng's family in three years are a reflection of his strength."

Shi Tong continued: "Since Taizu released his military power over a cup of wine, my Shi family has learned a lesson. The benefits of gold and iron are actually as good as books, but the reputation is not as good as the scholarly family, and the work is harder."

Su You stopped what he was doing and looked at Shi Tongtong: "Old Shi, and you, you can even do the blacksmithing work yourself. This is also a kind of tutoring, not a disciple of a pedant."

Shi Tong stretched out his hand and said, "Look at my calluses! If nothing else, my aunt has to get up at the time of the five drums every day to practice spear and stick. I, the Shi family, can't talk about it, rely on it."

It’s all about hard work.”

Su You nodded and said, "I really like your little aunt's temperament, her innocence and simplicity."

When Shi Tong heard what Su You said, he grinned with joy: "Really? Master, you are telling the truth!"

Su You heard this and didn't take it seriously: "I always tell the truth. By the way, the tutor of the Shi family means saving. The profit of porcelain is not as good as printing gold and iron, and it takes up a lot of funds. What the Shi family uses is the ant moving accumulation."

Less is the way to make more, right?”

Shi Tong laughed loudly: "Master, this metaphor is so apt. This is really the porcelain rooster's way of building a family."

Su You shook his head and said: "It's not easy... By the way, what's going on with my Su family? Speaking of the Jiangqing family, why is the family so weak? It's not on the same level as the other three families."

Shi Tong waved his hands: "No, no, no, when it comes to the Jiangqing family, others in Meishan may be dissatisfied, but the Longli Su family is all about this!"
Chapter completed!