It is now midsummer in the fifteenth year of Wanli. It has been almost two months since the last snowstorm in the hot and dry Beijing city without a drop of rain.

The water level of the Jinshui River in the Forbidden City has also dropped a lot, and one after another white watermarks have been condensed on the stone walls on both sides of the river. The cicadas' cries in the palace garden also come and go, making people unable to help but feel a little bit sad.

Anxiety lingers in my heart.

"The weather in Beijing is still so hot. I didn't expect that I couldn't escape even after traveling hundreds of years. What's even more embarrassing now is that there is no air conditioning. It's really killing people!"

Zhu Changluo pulled his collar hotly and thought to himself. He really didn't understand how people in this era could resist the heat so much. On such a hot day, the collar could still cover the neck. Even though he was wearing a silk gauze jacket, there were so many people around him.

I also placed an ice cube filled with crushed ice, but the heat was still pervasive.

"There is no baking soda in the imperial kitchen. This has brought my soda business to a standstill. What should I do? Do I really have to do it myself?"

Zhu Changluo looked at the large piece of trona lying next to him. He really didn't know what to do. How can baking soda be made from this thing?

Zhu Changluo endured the heat while recalling the method of making baking soda. It was really difficult. It was all knowledge from many years ago. Since he left school, he has almost given it back to the teacher. Just like the last time he made penicillin in a local way,

That was also the result of overwhelming luck.

"First dissolve the alkali in water, and then add it to the carbon dioxide reaction. But how to make carbon dioxide? You can't breathe it with your mouth."

Zhu Changluo fell into a difficult bottleneck for a while. It was so difficult to make simple carbon dioxide in ancient times with simple conditions. It was really frustrating.

"Think carefully about the methods of producing carbon dioxide that the chemistry teacher taught you."

Zhu Changluo thought so hard that his head almost exploded. It was so difficult.

"The calcination method is obviously unreliable. Even if it is calcined, I can't withstand the high temperature to collect carbon dioxide. What else can I do? It's such a headache. I really regret that I didn't study as much in class."

The more he thought about it, the hotter he became. Zhu Changluo shouted towards the outer door, "Have you found the salt that Wang An asked you to find?"

When Wang An heard Zhu Changluo's voice, he ran over all the way, regardless of the hot weather, which gave him a heat stroke.

Wang An wiped his sweat and came in holding a jar of salt that he had just found from the imperial kitchen. As soon as Wang An entered the palace, he felt the temperature of the iceberg in the palace and felt extremely happy instantly.

Wang An said: "Little master, I have already found the salt."

Zhu Changluo said: "Give it to me quickly."

After Zhu Changluo got the salt, he opened the ice jar and poured a jar of salt into the ice jar. Then he asked Wang An to stir the ice jar with a copper stick.

Immediately, the cold air in the ice mirror was released crazily under the action of the salt, and the surrounding temperature could not help but drop a few degrees.

Feeling the temperature drop, Zhu Changluo's irritable mood finally felt better.

"It's comfortable. Ah San didn't lie to me."

Wang An also wondered why the temperature inside the ice mirror suddenly dropped so sharply, and when he heard Zhu Changluo say that Ah San didn't lie to him, Wang An asked curiously: "Little master, who is Ah San?"

Zhu Changluo said: "You don't know Ah San. Ah San is a species that Zheng He saw when he went to the West. They are extremely magical and often do some incredible things."

Wang An exclaimed and praised Zhu Changluo: "My young master is so knowledgeable and knowledgeable. Even my slaves don't know this."

Zhu Changluo nodded comfortably, feeling much better now.

In fact, the reason why Zhu Changluo knew that the reaction between salt and ice would quickly release cold air was because he once saw a video in which Ah San used this method to make ice cream. Zhu Changluo still had a fresh memory of them pouring salt into ice.

, I couldn’t help but give a thumbs up at that time!

Unexpectedly, one day I would also borrow Asan's method.

Thinking of this, Zhu Changluo's eyes lit up, "Yes, I can't figure out how to make soda for a while. I can make some cream popsicles! This one is also invincible!"

Zhu Changluo turned to Wang An and said, "You can help me find some sour milk, honey, and raisins. I will be very useful!"

Before Wang An could rest for a while, he was arranged by Zhu Changluo again.

Wang An immediately went to the imperial kitchen and found everything Zhu Changluo needed.

Zhu Changluo saw that these things were ready, and Zhu Changluo immediately started making them. He first found a few porcelain cups of similar shapes, and then asked Wang An to clean them.

Zhu Changluo poured the prepared yogurt, milk and honey into the cup, then garnished it with a few raisins, then covered the cup and put the uncongealed ice cream into the ice cream to freeze.

It felt like time was almost up before Zhu Changluo opened the ice cream. Zhu Changluo looked at several cups of frozen hard ice cream and said, "Wang An, bring me a towel and a silver spoon."

Wang An handed over the towel and silver spoon. Zhu Changluo wrapped a porcelain cup containing ice cream in the towel, and then used the silver spoon to scoop out a spoonful of ice cream in the cup to taste.

Zhu Changluo tasted this cool, sour and sweet ice cream and instantly felt extremely happy, "This is the taste!"

Then Zhu Changluo said to Wang An: "Take one and try it too."

Wang An couldn't believe that Zhu Changluo would actually let him try this novel ice cream. Wang An carefully took out one from the ice pan, and then followed Zhu Changluo's example and scooped some ice cream into his mouth with a small spoon.

inside.

In an instant, Wang An felt indescribable happiness. He had never eaten such delicious food in his life.

Wang An burst into tears with excitement, knelt on the ground and thanked Zhu Changluo for the gift. "I thank you for your kindness, young master. I have never eaten such delicious food in my life."

Zhu Changluo smiled and said: "Don't cry. There will be a lot of delicious food after you follow me. But you can't eat too much of this ice cream, because your stomach won't be able to bear it."

Wang An said excitedly: "I have written it down."

Zhu Changluo finished a cup of ice cream with satisfaction, and then said to Wang An: "Go find a small box and put a small quilt in it."

Wang An quickly put down the unfinished ice cream in his hand and went to find what Zhu Changluo wanted. Zhu Changluo quickly shouted: "Go after eating, don't be in a hurry."

But Wang An didn't think so. He believed that Zhu Changluo's request should be completed without any hesitation, and Zhu Changluo should not be kept waiting for too long.

So, Wang An said: "The slave found it soon, little master, don't worry."

After a while, Wang An actually found a small box and carried it over. There was also a small quilt in it.

Zhu Changluo said: "Take out two sealed cups of ice cream from the ice cream bin, put them in the box and wrap them in quilts, and then go with me to Qianqing Palace to present them to my father."

Wang An was excited. He didn't expect that Zhu Changluo would take him to see the emperor! This is really a great honor!

Wang An followed Zhu Changluo's instructions and quickly put two cups of ice cream into the box. Then Zhu Changluo ordered: "Wait for me, I will send a cup of ice cream to my concubine and sister, and we will set off."

Zhu Changluo came out with the last cup of ice cream left in the ice cream, and then went directly to the main hall of Jingyang Palace next to him. At this time, Concubine Gong was shaking the cattail leaf fan to coax Zhu Xuanyuan to sleep.

Zhu Changluo came in and said, "Mother, concubine, this is the heat-relieving ice cream made by my son, please try it."

Concubine Gong took the ice cream from Zhu Changluo, and she could feel the coldness through the towel wrapped around the cup.

Concubine Gong looked at the cup of ice cream made by her son with great curiosity. She took a spoonful of it with a silver spoon and put it into her mouth. It was really refreshing and exciting, sour and sweet, and delicious.

At this time, Zhu Xuanyuan, who was sleeping, seemed to smell the smell. She closed her eyes and sat up, saying in a milky voice: "Mother, I want to eat too."

Concubine Gong and Zhu Changluo looked at each other and smiled, and Zhu Changluo said: "You can give my sister something to eat, but my sister is weak, so I have to eat less, otherwise she will have a stomachache."
Chapter completed!