Li Laosi took out a silver ingot of ten taels of silver and put it on the table, and said, "Shopkeeper, my master will give you ten taels, you can find a few experienced craftsmen!" ”

The jade boss looked at Li Laosi's silver and said with a wry smile: "Official, if you hire a jade craftsman, the shop will be closed." Pen~Fun~Ge www.biquge.info you just give me fifty taels, and I can't let you hire my jade craftsman. ”

Li Laosi and Li Zhi glanced at each other, and Li Zhi said: "Shopkeeper, you gave us the master, and you can train a few newcomers to grind jade." ”

The shopkeeper said: "Official, these jade craftsmen are all ancestral skills, and they are not passed on to sons-in-law." The old jade craftsman is gone, and the new jade craftsman doesn't know how many years it will take to learn the skill, how can it be cultivated day and night? For the sake of the small shop, don't rob the jade craftsman of the shop. ”

When Li Zhi heard this, he asked, "These jade craftsmen are ancestral skills, not the techniques you taught?" ”

The shopkeeper didn't react for a moment, nodded and said: "The small shop also hires these jade craftsmen with monthly money, and they are all skills passed down from their families, where is the ability of the small shop?" ”

After saying this, the shopkeeper reacted, regretted it a little, and secretly said that this official had to skip himself and hire a jade craftsman directly.

Li Zhi smiled and said, "Since that's the case, then we won't talk to you." ”

Li Zhi and his party left Jade Hutong and found an inn to live in. After resting for a while, Li Zhi found the shopkeeper in the inn and said, "Shopkeeper, I have something to ask you!" ”

When the shopkeeper saw Li Zhi's official uniform, he wanted to kneel down and salute, but was helped up by Li Zhi.

"I'm going to hire a few craftsmen who can polish jade, do you recognize?"

The shopkeeper asked honestly, "What kind of jade craftsman does the official want?" If the top craftsmen can do some clever work, and can spend on jade, drill, and penetrate flowers, then the salary will be high, and it is not easy to be invited. If it is an ordinary jade craftsman, just opening jade and tying it, there will be more in our county, and it is generally two taels of monthly money. ”

Li Zhi asked, "Do ordinary craftsmen polish the edges and corners and polish the jade?" ”

The innkeeper said: "Then it will be, this will not be considered a jade craftsman?" ”

Li Zhi nodded and said, "Then you will find me a few ordinary jade craftsmen who are skilled in polishing and polishing." I want to hire five people, and I will give each person three taels of silver per month, provide three meals a day, three meals with meat, and give them fifteen taels of silver for each person to move the house, and let them go to Tian0 Jinfanjiazhuang to do things! After saying this, Li Zhi took out two taels of silver and put it on the table, and said, "This silver is for you, which is considered an introduction fee." ”

The shopkeeper's face suddenly filled with a smile and said, "I'll go for the official!" ”

Li Laosi saw that the shopkeeper was full of joy, and added: "The shopkeeper, you can find the right person!" If you find a craftsman who can't do things, my official is not easy to get along! ”

The shopkeeper hurriedly said: "I know, Xiaomin knows!" ”

The next night, the shopkeeper took nine jade craftsmen to the inn and introduced them to Li Zhi. Li Zhi glanced at the nine people and said, "Why did you find so many people?" ”

The shopkeeper said: "When they heard the official's monthly money, they were all willing to come." These nine people are all veterans, so let's pick five people. ”

Hearing the shopkeeper's words, the nine jade craftsmen all looked at Li Zhi nervously, for fear that Li Zhi would not want him.

Li Zhi glanced at the nine people and said, "How many are there who have become relatives?" ”

Then six older jade craftsmen stood up and said that they had become relatives. Li Zhi glanced at the six people, nodded, eliminated the eldest one, and selected the other five.

These five jade craftsmen are rich and married, which shows that their current income level is good, and they are naturally craftsmen with good skills. The other three bachelors have no money to marry, and the level is difficult to estimate. Li Zhi couldn't test the level of these jade craftsmen for a while, so he could only use this crude method to make a simple assessment.

The five jade craftsmen who became a family were selected by Li Zhi, and they were overjoyed, and secretly said that their income has increased by half now, and the new owner also provides three meals with meat, where can I find such a good thing?

Li Zhi found the craftsman, immediately paid fifteen taels of moving expenses, and urged the craftsmen to move to Fanjiazhuang immediately to organize the production of reading glasses.

On January 27, the ninth year of Chongzhen, the jade craftsmen moved their belongings and tools for grinding jade from Yutian to Fanjiazhuang, and began to produce reading glasses for Li Zhi.

The first step in making reading glasses is to make a molder, Li Zhi drew the drawings and found a blacksmith to make 20 glass lens molders with different arcs. Glassmakers poured annealed glass heat into these molders, pressed the convex glass sheets, and then handed the projected glass lenses to the jade craftsmen for processing.

The jade craftsmen had to polish the coarsely pressed glass pieces into convex lenses with the only focal point.

The operation of jade craftsmen to polish glass pieces is called grinding in jade production. Craftsmen use a tool called "grinding" to finely grind the surface of the glass. During the specific operation, the jade worker holds the glass with his left hand against the edge of the rotating steel plate. At one end of the table was a basin filled with water and red sand, and the jade worker scooped the sand with his right hand and poured it on the glass. The hard jade sand, combined with a rotating and sharp edge piercing edge, can grind off the unneeded part of the glass.

At first, the craftsmen didn't know how to sharpen the lenses to focus, so Li Zhi asked them to check the focus against the sunlight and test various grinding methods several times. The craftsmen tried and talked with each other, and finally spent half a month figuring out the trick of concentrating the focus, and grinded out 20 convex lenses with different focal lengths.

Grinding out the lens is not finished, but also polished.

Polishing is divided into two steps: wooden and leather.

Wooden skulls are generally made of gourd pulp. The structure of the tool used in the operation is that the board is connected to the wooden shaft, which drives the round wooden pillar to rotate and polishes the lens with the help of stone sand. The hardness of the stone sand used in this step is relatively low, and quartz sand is generally used.

Then there is the leather: when the leather is made, the round stool made of cowhide is used to rotate and rub the lenses, and the lenses are ground into smooth and translucent glass lenses.

After polishing, the reading lenses are ready. Li Zhi asked the craftsmen to put the lenses into a wooden frame, and they became reading glasses.

The power of reading glasses is based on the length of the focal length. Li Zhi inverted the approximate length of one meter from his height, made an iron meter ruler, and then multiplied the reciprocal of the focal length of each lens by one hundred to get the power of each lens.

This is the first time that lenses have been made, ranging from 100 to 800 degrees.

Li Zhi found a few literate old men to do experiments and asked them to try on reading glasses of various prescriptions. After wearing reading glasses with the right prescription, these old people found that they could read the text clearly at close range, and they shouted magically.

This thing invented by the Lord of Ethics is always so incredible.

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Thanks to the 500 tip of the Ghost Gree, thanks! Thanks to the 100 of the little brocade clothes stormy night.