Gao Yiming is an idle person, although he will mostly stay in the rental house and not go out when he is not working in the future, but at present, he can live in thousands of mansions, and he chooses countless beauties, and he has a low desire for these things, and he uses his extra time on government affairs.

The country's infrastructure projects have not stopped from the beginning, and roads across the country are becoming smooth, and even cement roads from the state capital to Nanjing have appeared in some places, because with the popularization of cement, manufacturing costs are gradually decreasing.

In his spare time, Gao Yiming is not wandering around the streets of Nanjing, or learning about the people's situation in the fields, and more time is in the college, exchanging knowledge with a group of gentlemen and students, from the initial solution of arithmetic, to astronomy and geography, from the national conditions and people's livelihood, to physical chemistry, from the macrocosm to the microscopic biology, everything, he asked the college to manufacture two astronomical telescopes, and three microscopes, although they are rough products, but it has opened a scientific door for the teachers and students of the college.

Let them know that learning is not only for those who are important, nor is it just for being an official, but to be a useful person for the country and the people.

Today he is going to give a physics lesson to the students at the academy to prove to them that under certain conditions, with the help of some instruments, some special substances contained in things can be fully played.

On the podium, which is the same as in later generations, there is an alcohol lamp, a cooling bottle, a liquid bottle, some beakers, test tubes and test tube racks.

There are also some rose petals.

Gao Yiming walked up to the podium, looked at the audience full of teachers and students, and in the last row, he even saw Cai Dafa, the superintendent, and nodded to Cai Dafa, and he started today's lecture.

"Hello gentlemen and students, there are two parts to my lecture today, the first is how to turn waste into treasure through scientific means, and the second is the necessity of copper money circulation."

"Let me talk about the first question first, I will do an experiment on this topic in order to show you the charm of physics more intuitively."

"Some of us women usually choose some flower petals to bathe or smoke clothes, in fact, this is the most uneconomical method, not only consumes a lot of petals, but the fragrance is not long-lasting, now I use the things on this table with the method of distillation, from these petals to extract the essence first."

Gao Yiming began to connect the experimental device as he introduced: "You must be curious, why these things are glass." Seeing that many teachers and students below nodded, Gao Yiming said with a smile: "Because the performance of glass is relatively stable, it does not react with most substances, and another is that he can let people intuitively see the reaction process."

At this time, he had already prepared everything, lit the alcohol lamp with a fire fold, put a lot of water and rose petals in the beaker on the alcohol lamp, and covered it with a lid with a rubber air duct, and waited for the distillate, but after waiting for a long time, the water in the beaker was boiling, but a large amount of water vapor came out of the mouth of the beaker happily, and there was not a drop of water in the cooling cup that Gao Yiming had been staring at.

The teachers and students in the audience looked at Gao Yiming's face full of embarrassment, and Gao Yiming was also sweating on the tip of his nose, which was embarrassing.

In the end, a younger student said timidly: "Sir, you can use a flask, the flask is well sealed, I have seen other gentlemen use it before."

Gao Yiming never thought that one day he would let the little doll build a staircase for him.

"Mmmm, you're so smart, Mr. gave you a failed test today, which tells us how noisy it was before the test, come on, let's do it again."

After changing the flask, the test went much smoother, and after boiling for half an hour, I got a half beaker of distillate, and there was a thin layer of oil floating on the surface of the distillate, and the distillate was poured into a clean flask to continue distillation. After repeating this process three times, Gao Yiming got a little bit of slimy and unpleasant smell.

The students sitting in the first row couldn't stand the smell, and they all began to fan away with books, Gao Yiming blushed and endured it: "First stinky and then fragrant, this may be the true meaning of life, cough cough cough !!" I wanted to pretend to be deep, but I was so smoked by the strong smell that I coughed.

coughed for a while, and then said: "This is just the beginning, it's not over yet, this thing is called perfume, I believe that literally everyone can know the charm of this thing, right, but the perfume has just been steamed out like this, and it needs to be matched with something to have a fragrance, now I will give you a trick, let you see how to turn the stinky into fragrant."

I saw that he used a dropper to carefully suck the thick liquid of half a tube, dripped it into the small porcelain bottle containing the spirits, and tightened the mouth of the bottle with cork, and shook it vigorously, as his arm kept swinging, a faint fragrance of moon flowers slowly spread in the classroom.

The students in the front row stopped fanning, intoxicated and smelled the charming fragrance of flowers, and the student in the back also stood up curiously.

"Look, this is perfume, this thing is sprayed on the body, the fragrance will not disperse for a day, the woman sprays it, I guarantee that you will always be eighteen years old, and the man sprays it, I guarantee that you walk on the street and the return rate is 100%."

"Haha! I won't give this bottle to the academy, and the rest of the students will come, and no one will get a bottle to shake like I just did, and configure perfume. ”

"I'm coming! I got it! "Cai Dafa is a pure businessman, and when the perfume emits a fragrance in Gao Yiming's hands, he sees the value of this thing, so after Gao Yiming finishes speaking, he can't wait to get started.

Gao Yiming didn't give Cai Dafa too much time, and threw him a recipe and sent them away, but when he came, he forced Cai Dafa to put the configured perfume into his arms and put a bottle.