This question is not an eternal question, but Li Er is very curious.
Empress Changsun, Du Ruhui, and even Li Junxian, who had been standing quietly, also looked at the wooden door on the ground curiously.
Everyone in the group thought of this.
At this time, the maid Mian'er Ying'er who was following Li Sheng couldn't help but smile.
Looks a little proud.
Li Sheng was not surprised by everyone's reaction. Anyway, Mian'er Ying'er was shocked when she saw the ice cellar for the first time.
"Sir, is this refrigerator used to store ice?"
Li Er thought he had heard something wrong.
Because it is not logical to put ice cubes in the cellar in reverse.
But Li Sheng just smiled.
"Of course it's not used to store ice, it's used to preserve other things."
"Meat, vegetables, fruits...etc."
"As for the ice cubes, of course you have to make them before putting them in!"
Li Sheng finished speaking.
Du Ruhui, Empress Changsun, Li Junxian, and Li Shimin were all stunned.
Ice cubes...
That was frozen by God.
This kind of thing can also be made artificially?!
Simply incredible!
"Sir, how is this possible?"
"What means was used to accomplish this?"
The four of them looked surprised. This time, even Li Junxian couldn't help blurting out, "It's impossible, ice is a gift from God!"
"What's impossible?"
Li Sheng said calmly.
"The method of using saltpeter and making ice are just trivial skills."
???
…
"The saltpeter method?"
"Isn't saltpeter a medicinal ingredient for alchemy?"
“You can also make ice using saltpeter??”
Li Er and others were completely shocked.
This is truly unheard of.
Li Sheng was not surprised by everyone's reaction.
To him, after all, the ancients were like this, they could be shocked by anything.
He was a little annoyed at first, but as time went by, he got used to it.
Everyone got along well, and Li Sheng explained to these people.
This uses a certain amount of saltpeter,
A set of simple equipment is used to carry out chemical reactions.
And this chemical reaction is a relatively rare endothermic reaction.
Therefore, it can take away the heat in the water, allowing the water to continuously lower its temperature, and finally... until it freezes.
Ice is regularly made with saltpeter and stored in the cellar.
You can maintain a low-temperature environment to store meat and other easily perishable foods.
Of course, you can also make snacks in the summer...
There is nothing to say.
After Li Sheng finished speaking, he found that Li Er and others were stunned.
"What is the chemical reaction?"
"What is an endothermic reaction?"
"It can actually absorb heat? Is this magic?"
Li Sheng was speechless and turned around, "Mian'er, go get some ice cream."
"Sir, it's early spring, and you said eating ice cream hurts your stomach..."
"It's okay. It doesn't happen once in a while, so go ahead."
"Yes, sir."
Mian'er stepped forward, knelt down and opened the wooden door on the ground.
A somewhat dark passageway was opened, and below was a staircase.
The little maid walked down the stairs.
At the same time, streams of dense white steam also poured out from the passage!
A chill came over my face.
Li Er and others suddenly realized that it might be really cold under this cellar.
It was early spring, and ice cubes were rare but not too rare.
But even at this time of year, the river is frozen,
But no one has ever heard of such a large amount of white cold air growing on that river.
Obviously, the environment in this cellar is much colder than the outside!
Everyone was secretly surprised.
And not for a while.
Mian'er carried a large wooden tray, climbed up the stairs along the passage, and returned to the crowd.
"Dear guests, sir. Ice cream, please."
…
On the big wooden plate, there are seven or eight small porcelain bowls.
In each porcelain bowl, there is a round object, which looks like a Lantern Festival, and is decorated with various fruit slices in different colors.
Li Sheng smiled and said, "This ice cream is a way to relieve the heat. It's okay to eat it in summer. But the cold weather has not passed in winter recently, so you should come with me to the living room to try it."
"well!"
"Walk!"
…
There is a stove and brazier in the living room, which is naturally warm.
Because they had been walking around for a while, everyone was even sweating a little.
At this point, we have almost been shopping all morning.
Soon, Mian'er came over with ice cream on a wooden tray.
Presented to several guests one by one.
Li Er and others looked at each other and began to taste.
After one bite...
"What is this and why is it so sweet?"
"Slices of fruit plus... plus what seems to be milk. It is simply a delicacy in the world."
"Wonderful, wonderful!"
This tasting lasted only 2 seconds.
Everyone only tasted one bite, but the whole living room was full of admiration!
It was still cold, but if it were during the hot summer season, it would probably be even more surprising.
Even though Li Er and others were royal nobles and were accustomed to seeing all kinds of delicacies, they still quickly finished the ice cream in the small porcelain bowl!
…
"ha……"
Li Er exhaled comfortably, even without any image.
I sighed in my heart, if Wei Zheng saw me eating like this, I'm afraid I would have to give him another lecture!
But he estimated that even Wei Zheng wouldn't be able to resist this delicacy...
"This thing is cool and sweet, sweet but not greasy. Young Master, this, this..."
Du Ruhui thought this thing was absolutely amazing. He was born in the Jingzhao Du family, but he had never tasted such delicious food in his life!
"ice cream."
"The ice cream is really delicious. But..."
"In the old man's opinion, ice cream is beautiful, but the art of making ice is the real magic. If the young master is willing, it will not be difficult to establish a foothold in Chang'an, right?"
Du Ruhui looked at His Highness with some curiosity.
He was telling the truth. Chang'an is home to many princes and nobles, so the ice-making art will definitely not worry about sales in hot weather. I just don't know why His Highness didn't go.
Li Sheng smiled faintly, but shook his head.
"Chang'an is not as prosperous as the countryside...Besides, the art of making ice requires the use of saltpeter, which is very troublesome to mine and use, so why bother? I will be able to sell some penicillin in a while, which will be enough for my food and clothing.
It’s no longer a worry.”
What Li Sheng told the truth was that he had no choice before because he had no capital, but recently he trial-produced penicillin, which was also the reason why he retired from Orion.
The words make sense.
But Du Ruhui's face froze after hearing this.
Whether it's making ice, or a panacea that can beat the wind and cold... these are all good things that are immediately popular when they are put on the market, and you will never have to worry about sales.
How come this guy talks like he's talking like cabbage?
He couldn't help but glance at Li Er subconsciously.
That look was very obvious.
Your Majesty, whether you want to establish a throne or not, if you can find this prince... you must have found a treasure...
After a while.
Finished the dessert.
After everyone chatted for a while, Mian'er Yinger left the living room at some point and went to the kitchen to get busy.
In the blink of an eye it's lunch time.
It was customary in the Tang Dynasty to have two meals a day with midnight snacks, and normally no lunch.
But Li Sheng wanted to entertain, how could Li Shimin and Queen Changsun refuse.
At this time, a burst of aroma came from the kitchen, and Li Sheng showed a smile.
"It's almost time. I'll treat you to Teppanyaki today!"