He was betrayed at the beginning, from a cake seller to a wealthy person

In addition to activated carbon, what Lu Yan wanted to do most was alcohol. This kind of very useful necessity was placed before everything else.

The alcohol content of medical alcohol is 75 degrees. The alcohol content of alcohol we usually drink is not high, about degrees. You can just buy liquor to make it. You don't have to make your own wine. The principle of alcohol preparation is very simple, which is distillation and condensation.

The boiling point of water is 100 degrees, and the boiling point of alcohol is 78 degrees. By heating the liquor to or degrees, the alcohol inside will evaporate and only water will remain.

Lu Yan hadn't made glass by hand yet, so she could only use metal to make distillation and condensation equipment. In fact, it was similar to the equipment used to make activated carbon. A long metal tube, with an open metal container on each side. The left container was filled with liquor, and the left container was placed in a hot water pot for water bath heating, and the right container was placed in a cold water bucket for condensation.

The water level in the hot water pot is lower, about half the height of the white wine. Heat the water to a semi-boiling state. When you see it is about to boil, pour some water in to keep it below 100 degrees.

Some of the alcohol in the metal container is not in contact with the hot water, which will lower the temperature. In this way, the temperature of the alcohol can never reach 100 degrees. The water inside will not evaporate, and all that evaporates is the alcohol.

After evaporation, the alcohol condenses into liquid in the container on the right. This is the entire process of alcohol preparation.

The degree of alcohol can also be measured. Lu Yan still remembers that when she was in junior high school, she was asked to memorize the densities of many common objects in life. The density of water is 1g per cubic square meter, and the density of medical alcohol is 0.8g per cubic square meter.

That is to say, the mass ratio of the same volume of water to alcohol is 1:0.8. First, take out 1 unit weight of water, pour it into the cup and mark it, then pour the prepared alcohol into the cup to the mark.

Measure the weight of the same volume of alcohol. If the weight exceeds 0.8, it means that the water content in the alcohol is too high and the alcohol content is not enough, so further distillation is needed; if the weight is less than 0.8, it means that the alcohol content is too high. If the difference is small, you can use it. If the difference is a bit large, add a certain proportion of distilled water.

A jar of alcohol was extracted. Lu Yan poured out a bottle to take away, and also poured a bottle for Xiao Tu to use first.

Xiao Tu took a sip out of curiosity, and his whole face wrinkled up: "It's so strong!"

Lu Yan was speechless: "Nonsense! I usually drink about 30 degrees, this is over 70 degrees! How can it not be strong?"

"Keep this for yourself. It will be very useful. You can take it to the military camp and give your master a jar." Lu Yan explained, "When you encounter a patient with an injury, wipe the wound with alcohol first. It will be painful, but it is a disinfectant. You can also use it to disinfect needles and knives that you usually use on people before using them. They are clean."

Xiao Tu nodded in confusion. Although he wrote down the process of preparing alcohol, he had never seen the specific effects of alcohol, so he still had great doubts about the use of alcohol.

Lu Yan didn't know how to demonstrate the effect of alcohol directly, and she couldn't find two people to cut a knife on a person to do a control experiment. She could only tell Xiao Tu: "Just do it if you have nothing to do. This thing is useful. When you make more, give a jar to your master. He will be more useful than you."

Lu Yan remembered something and continued, "By the way, alcohol can also be used to reduce fever. If someone has a fever, use alcohol to rub the heat dissipation areas on his body. It can reduce the fever. When the hospital opens and more people come to see the doctor, you can try it."

This was the first time Xiao Tu heard about the medical department. He repeated his question to Lu Yan: "Medical department? You want to build a medical department in the county?"

Lu Yan nodded: "Of course, I found you so many apprentices, it will definitely be useful, then you will take turns to see patients, free of charge to the people, the people only need to pay a part of the medicine money, all will be reimbursed by the government. The government will give you a monthly salary every month."

Xiao Tu found this interesting: "Won't the government lose money? How can they have so much money?"

Lu Yan touched her chin and thought that she could make a plan and think about how to launch the medical insurance plan. Medical insurance must be promoted. The premise of cheap or even free medical care is the guarantee of government revenue. Don't even think about how much tax revenue Liaoyang can get. It is basically impossible to maintain a healthy cycle without paying insurance.

But now the people of Liaoyang are so poor that it is almost impossible to promote medical insurance and ask them to pay money to the government for no reason. It has been many years since modern society has achieved universal medical insurance. In the next few years, we have to find ways to make more money and improve the economic conditions of the people.

Xiao Tu made very detailed records of how to prepare alcohol and activated carbon. Charcoal and white wine were easy to buy. Lu Yan left him a few taels of silver and handed the task to him.

When Lu Sheng got home in the evening, he saw the alcohol that Lu Yan had made today. After listening to Lu Yan's introduction to the effects of alcohol, his eyes sparkled: "You are so amazing, how can you make so many good things."

Lu Yan asked him curiously, "I just said it, and you believed it? You haven't seen it either, so don't you question the effect?"

Lu Sheng waved his hand: "You won't lie to me about this kind of thing. What good will it do you?"

Lu Yan thought about it and it made sense. If she were Lu Sheng's subordinate, she might use this thing to seek credit or do something to gain Lu Sheng's attention, but she didn't need that. She wanted as much attention from Lu Sheng as she wanted, even without producing anything.

She made this thing for one reason only: it was really useful.

"I have a question. How do we promote this thing?" Lu Yan said, "It's useless if you just believe me. We have to let everyone see its effect. Only then will there be a market and we can sell it and make money."

Lu Sheng thought for a moment and asked, "Do you plan to sell this? Is it possible not to sell it first?"

Lu Yan didn't quite understand what Lu Sheng meant: "What do you mean? Not selling? What are you going to do?"

Lu Sheng nodded: "I want to present it. The Crown Prince will be here soon, and then I will let him take it back to the capital to present it to His Majesty. The Imperial Hospital will definitely have many ways to verify its effectiveness. By then, it will not only be promoted in Liaozhou, but if His Majesty finds it useful, it will be promoted throughout Dali."

Lu Yan slapped her thigh excitedly: "It's settled!"