Today's rush and toil, just for the that I bragged about when I was young. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Tang Yi didn't want to say that he was young, he couldn't be considered an adult, so he blew out the bull, and this was not small.

Earn an academy in three years, don't say that Fan Zhongyan doesn't believe it, any Great Song Dynasty citizen has to treat him as a madman.

How much does it cost to run a college? How much does it cost to run a college with full scholarship?

Let's do the math.

In the middle of the Northern Song Dynasty, a common family would not spend more than two yuan per month. Of course, these two pieces of money are only counted for food, clothing, housing and transportation, not for the case of supporting Wensheng at home.

If there are scholars in the school, then the expenses will have to be calculated separately, and at least four to five times a month's income will be required to support it.

Reading was a luxury in ancient times.

In ancient times, paper was a luxury, paper for writing was more expensive, and books were a luxury among luxuries.

Although movable type printing has been invented in the Song Dynasty, there is no way to popularize it because of the limitation of movable type materials, and the printing of books is still used for engraving printing, which greatly increases the cost of books.

Not to mention the orthodox subset of scripture and history, a book of less than 100 pages of "Poetry and Miscellaneous Notes", the bookstore sells for two yuan, which is equivalent to a month's expenses of a commoner. The price of a "Anthology of Current Literature" has always been 500 yuan, and it is read now, and it will become obsolete in a few days, and you will have to buy a new one when the time comes.

In the Great Song Dynasty, raising a scholar, not counting food, drink, clothing, and housing, just books, paper, and ink, had to be at least two to three times a month. Tang Yi encouraged Fan Zhongyan to open a college with free academic qualifications, that is, the students' study expenses were all paid by the college.

To raise a student, you need about 30 books and paper and ink a year, and 3,000 to raise a hundred. This is not the end, if Tang Yi takes care of the students' food and clothing with a hot brain, it will be a big expense.

You have to have a teaching house to run a college, right? Buying land and building a house is all about money.

There has to be an edict, right? If Fan Zhongyan wants to run a school, he can't hire people with ordinary knowledge to teach, at least he has to be at the level of Confucianism, right? How is the salary calculated?

Coupled with some odd expenses inside and out, if Tang Yi really wants to help Fan Zhongyan run the academy, he has to come up with at least 20,000 to 30,000 yuan of silver a year to barely support it.

Twenty or thirty thousand, if you rely on Tang Ji Restaurant alone, the surplus of 20 years is enough for one year's expenses. What's more, Tang Yiyi excitedly said that he would help Fan run the largest academy in the world.

Hehe... Because of this sentence, Tang Yi may have to work for Fan Zhongyan for the rest of his life.

....

However, when he said it and splashed the water, Tang Yi felt a lot of energy in his heart.

"Lao Tzu still doesn't believe it, with my knowledge beyond this era for a thousand years, can I still make money difficult in the Great Song Dynasty?"

As he said when he proposed to the Zhang family, what business is the most profitable?

Monopolize!

No matter what you do, as long as you monopolize it, it will be a huge profit.

What is the biggest advantage of the traverser? It's just that whatever you take out is not available in this era, it's all a monopoly.

What's more, Tang Yi is still a chemistry student!

...

Tang Yi said a word, and he carried a academy on his body, so he had to start thinking about how to make money immediately.

"Big brother, you go to Dongshi to buy ten catties of lard and come back, and then bring a few boxes of rouge gouache to the rouge shop, and then buy two zhang of cotton cloth."

"What are you doing with so much lard?" Ma Dawei is a little unclear.

"Besides, no one in our family can use rouge?"

"You'll know when the time comes." Tang Yi didn't explain, and stepped out of Tang Ji.

When I came back, I saw Tang Yi carrying two empty jars in his hands, and it was very strange that these two jars had two holes at the bottom, connected with a thin pipe half a foot long, which was specially ordered by Tang Yi to the Hujia Iron Shop in Xishi.

It is said to be customized, but in fact, it is not difficult to do. Just drill a hole in the bottom of the ready-made jar and press the pipe, and it will be done in a few moments.

The three members of the Ma family couldn't help but wonder, what is Da Lang trying to drum up?

How did they know that Tang Yi drew a big cake for Fan Zhongyan and had to find a way to make money.

Tang Yi put the two jars aside and took a pot of charcoal from the kitchen. What made everyone strange was that Tang Yi actually poured water into the charcoal basin and washed it as if he was bathing in charcoal.

Ma Bo looked puzzled, "This, what is Da Lang doing?" ”

Tang Yi's hands were black after washing charcoal, and he raised his head and said, "I can't say a word or two, Ma Bo, you go find some fine sand and pebbles." It is best to have a pot of stones from large to small. ”

Tang Yi wanted to get a simple filter. Gravel, fine sand, and charcoal of different sizes are layered into the jar, and the liquid is poured into the jar, and then flows out from the thin tube at the bottom of the jar to have a filtering effect.

In fact, the best filtration effect is activated carbon, but now the conditions are limited, Tang Yi can only use this soil method instead, and there will be an opportunity to make an activation furnace dedicated to burning activated carbon in the future.

As for charcoal washing, there are a lot of impurities in the charcoal used for ignition, which can not be removed by washing, and washing with water can only wash off the gray matter on the surface of the charcoal.

After a while, Ma Dawei came back with ten catties of lard and a few boxes of rouge and cotton cloth.

Lard is the main edible oil of the Great Song Dynasty, and vegetable oil is not used at this time, so there is specially refined lard for sale on the street.

Ma Dawei didn't know what Tang Yi was going to do, but Da Lang has always had a lot of ideas, and he always had his reasons, put down his things, and washed charcoal with Tang Yi.

At this time, Ma Bo and Aunt Ma also came back with a few small pots, which were filled with fine sand and pebbles. Tang Yi went over to check it, nodded with satisfaction, and asked Ma Bo and Aunt Ma to wash the fine sand and stones with water a few times.

After the charcoal, sand, and stones were washed, Tang Yi took out a jar with a thin tube, spread cotton cloth at the bottom of the altar, put a layer of large charcoal, and then spread a layer of cloth and then a small piece of charcoal, followed by fine sand, small pebbles, and large pebbles, and five layers were stacked, accounting for most of the jar, and this rough filter was completed.

Tang Yi smiled with satisfaction, got out of Tang Ji, and turned around and entered the Sun Family Medical Hall.

"Is there quicklime?" Tang Yi asked.

"Lime?" Sun Langzhong frowned, in ancient times, in addition to painting white walls, lime also had medicinal uses.

"What do you want lime to do?"

"It's useful, just give me some."

Sun Langzhong didn't know what he was going to do, but he still pulled out the medicine box containing lime in the medicine cabinet.

Tang Yi glanced at it, there was only half a box less, at most half a catty, and simply snatched the entire medicine box.

"Give it all to me." As he spoke, he turned around and left.

Sun Langzhong was anxious, "What are you doing with so much?" Will eat the dead! ”

"Don't worry, who has nothing to eat this stuff, I have other uses." Tang Yi threw down a sentence and disappeared outside the door of the medical hall.

Sun Langzhong was still a little uneasy when he saw his anxious appearance, so he followed him out to see what this kid was going to do.

Tang Yi returned to Tang Ji and took baking soda from the kitchen, this thing is used for making noodles, and Tang Ji has a lot of inventory.

All kinds of preparations were almost complete, Tang Yi was about to start work, when he suddenly had a thought in his heart, and asked Ma Bo: "Do you know where there is salt brine?" ”

"Salt brine?" Ma Bo was stunned, "We don't produce salt in Dengzhou, where does the salt brine come from?" There are halogen blocks. ”

Tang Yi slapped his face, "The marinade block is better!" Where? Find some. ”

"There's a tofu shop across the street, I'll ask for some." Ma Bo said and went to ask for the brine.

Tang Yi asked Ma Dawei to take some lard and put it in the pot to melt, then took an iron basin and poured water on it, and poured all the quicklime into it.

....

Now many people may have guessed that Tang Yi is making soap. Half of the ten time-traveling novels in later generations have done this business, which is not unusual at all.

That's right, what Tang Yi has to do is indeed a very simple saponification reaction.

But soap, however, was not his main purpose.

As a master's student in polymer chemistry, a saponification reaction of a grease is just to get a few pieces of soap? That's too low, isn't it?

There is an even more precious substance, which is more valuable and useful than soap.

.........