In a certain room in Wuzhuang Temple, there are many people who are busy, they take out copper coins from different wooden boxes, first put them on the desk, cover them with white paper, and then smear them with charcoal pen slightly through the white paper, and trace the entire copper coin into an image. Pen % fun % Pavilion www.biquge.info

Write down the words on the wooden box corresponding to the copper coin on this paper, then wipe off the rust of the copper coin, then use a tool to grind the crumbs from the body of the coin, and then use white paper to weigh it on a balance after a certain amount is enough.

After writing down the weight, place the crumbs in an agate bowl and grind them with an agate stick.

After tossing for a long time, I poured the ground crumbs into a small glass cup, closed the lid and carefully took it to the next door.

In the next room, on the long case lined up, there is a beamsplitter, after several years of improvement, the simple beamsplitter that Liu Yang tossed out back then, and now the performance has been significantly improved.

In front of each beamsplitter is a metal tube with a flame at the mouth, which is used as a light source to observe the "sample", and the debris that has been ground off the copper coin and ground is the sample.

There are two people operating the beamsplitter, one is responsible for observation, the other is responsible for "injection", and the person who is taking the sample takes out a small metal spoon, scoops up some debris and puts it in the flame in front of the beamsplitter.

The person in charge of the observation stared at the light and shadow carefully, and then wrote something in charcoal on the booklet, and after a few moments, the person who injected the sample repeated it, and the person who observed it recorded it again.

Samples are constantly being sent in and then "tested" with beamsplitters, and the number of copper coins is very large, and the people who analyze them rotate the division of labor, so as not to be too dazzled by the fire.

Under the leadership of his second uncle Yu Wenwen, Yu Wenli watched the whole process, and personally looked at the beamsplitter, and was amazed by this mysterious spectroscopy, but there were still doubts: what is the principle?

"Different metals emit different lights when burned, and this light cannot be distinguished with the human eye alone, so you have to borrow tools, and the beamsplitter is such a tool."

Yu Wenwen lightly introduced the principle, this is an esoteric science, with the scientific level of this era, it is very troublesome to explain in depth, and Yu Wenli did not delve into it.

For him, this beamsplitter is similar to tools such as clairvoyance, although the beamsplitter in front of him is used to "detect" copper coins, but he knows that it is not good to ask too much, and if the second uncle wants to do this, there must be a reason to do so.

Seeing the new gadgets, Ah Li took a turn in the Wuzhuang Temple, this place he had been here before, so there was nothing unusual, he didn't understand the "wheel way" of those Taoist priests at all, so he retreated.

Yu Wenwen sent someone to send his nephew home, but he stayed, he didn't come here today to wander around, but to see how things went.

"When will the test results be available?"

"It will take two days to return to China."

"Time should be rushed, but there should be no mistakes in the busyness, and each sample and the corresponding test results should not be confused."

"Yes."

Yu Wenwen turned to the next room, sat by the desk and drank tea and gradually fell into deep thought, the situation of private coins became more and more serious, he couldn't wait any longer.

Previously, there were very few copper mines in Shannan, and there were no large money prisons, so the amount of coinage was low, although it was also forbidden for people to mint coins privately, but there was no immediate pain, after all, the source of private coins was not under the rule.

Then the Zhou State took the Daye Mine, which included the copper mine, and the Qian Jian was then established and began to mint money on a large scale, and the Daye Qian Jian became the main source of copper money in Shannan.

As the governor of Huangzhou, Yuwen Wen personally experienced what it was like to have a hemorrhage: the money made by Daye Money Supervisor quickly disappeared without a trace as soon as it was put on the market, and the previous investment was lost.

The direct consequence is that the money supervisor loses money and is thankless, and the money bag that was originally expected has now become a bottomless pit, and every penny minted will lose at least one penny, and there will be no effect.

The root of the problem is privately cast, this is a thousand-year-old stubborn disease, and now it is directly related to Yuwen Wen.

Private coinage needs copper, either by opening their own mines to mine copper, or by finding a way to get copper from elsewhere, and it is good to see collusion with government-run copper mines or money supervisors to buy off handymen, craftsmen and even officials to steal copper.

If this doesn't work, it's easy to do it, just collect the copper ware on the market, and even the good money in circulation, and take it to cut the edge and take the material, or just melt it down.

A sufficient amount of government-made money, after being melted, a large amount of lead, tin and other metals are added, and it is cast into inferior money with very poor fineness, and it is also taken for circulation, and it is a huge profit to change hands:

A good money can be made into two or even three bad money, which is equivalent to turning one penny into three pennies, and such huge profits have made many people ready to move, and even put it into practical action.

In the southern part of Shannan, the government's money is the best source of copper, in other words, the copper coins of Daye Jian have become the source of copper for private coinage.

The newly minted money, the full amount of copper, and the high cost of Daye Jian disappeared without a trace not long after it was put on the market, and there are signs that it was either handed down from private cellars or turned into inferior money with very poor condition.

If the barter of the small peasant economy is not enough, but Huangzhou is now prosperous in commerce, a large number of coins are in circulation, once the bad money is overflowing, it is a huge hidden danger.

The act of minting coins privately will lead to a shortage of copper in the market, and the criminals will not only "eat" the good money, but also "eat" the copper, and those who need the copper will also use the good money in circulation to melt the mint, which will cause a copper shortage.

This is a shameless robbery, and the biggest victim is the one-legged bronze man Yu Wenwen!

I worked hard to train the troops with grain, tried my best to plan strategic goals, ran around to lead the troops to fight, and finally won a copper mine, and I had to organize laborers to open the mine, and I had to recruit craftsmen to smelt copper and cast money.

As a result, you melted all the copper coins, and when you changed hands three times, you doubled the huge profits, and you can make a lot of money lying down, and even made Daye Money Prison lose money with the table, causing inflation to begin in Huangzhou, have you ever thought about my feelings!

Yu Wenwen's feelings are very bad, just like being fed, so he has to take action to let the relevant people die, one of the means is spectroscopy, that is, spectral analysis.

Analyze the composition of various bad coins, judge the source of raw materials according to the fixed proportion of metal components, and then find out where the source of the ore is according to the composition comparison of lead and tin ore in various places.

Find these mines, investigate their supply channels, and find the big buyers, who are probably bastards who mint coins privately.

Spectral analysis in hand, don't want to leave the private scum!?

Just kidding, if you really want to think like this and put it into practice, it's really metaphysics, because it's impossible to achieve.

The bad coins circulating on the market, some of them were privately minted by the ancients hundreds of years ago, and some may have been circulated from other places.

Not to mention that micro-analysis is not technically possible, so many samples, the results of the analysis are "almost", and then it depends on guessing? Isn't this metaphysics?

Even though the performance of the beamsplitter has improved greatly over the years, it is still only qualitative and not possible to quantify precisely, because it is a delusion to analyze the various components precisely because of the multiple disciplines involved.

But there is no endless road, as long as you change your thinking, you can "get started".

Daye's copper coins are the source of privately minted bad coins and copper materials, and what Yuwenwen wants to catch is the lawbreakers who use Daye Qianjian's copper coins to make counterfeits and sell counterfeits.

How to do the hands and feet? It's useless to make marks on copper coins, and once you melt them down, there are no marks, but in Yuwenwen's opinion, this is not a problem, because he has a spectroscope.

Add a certain metal to the coinage copper material, which is unlikely to be found elsewhere, and then it can be detected by the spectral mirror, so as long as the fake money used as the raw material of Daye Jian copper coin, it can be distinguished from other inferior coins by this mark.

The answer is metal zinc, which is impossible to refine in batches in this era, but the spectroscope can barely identify zinc from the copper-zinc alloy, and Yu Wenwen, who has mastered zinc alchemy, uses it as a "marker" added to copper coins.

The beamsplitter does not need to be quantitative, it only needs to be qualitative, and more than ninety percent of the inferior money that can detect the zinc spectrum may be made of melted Daye Prison copper coins as raw materials, and its source is the thief's nest that Yuwenwen wants to trace.

Using zinc as a mark on the copper and using a beamsplitter to distinguish it, using a beamsplitter with this strategy is not metaphysics.

In the follow-up, a large number of people need to be sent to investigate, to catch the "tongue", to chase the clues everywhere, the workload will not be small, but with the help of the spectroscope, it is enough.

What did you say about taking money from my pocket and stabbing it open? Aunt can bear it, uncle can't bear it!

Yu Wenwen, a lawless person who was privately minted elsewhere, can ignore it, and now he wants to catch these bastards who melted the copper coins of Daye Prison! (To be continued.) )