I’m Marquis in Great Tang

Du’s house, backyard.

Du Qi is now busy using the Saltpeter manufacture ice cubes he bought. Liu Jian stood nervously aside, with a look of awe on his face. In Liu Jian’s view, the impossible ice making success on a hot day is too extraordinary.

At this moment, Du Qi has already deployed everything. He fetched a slightly larger tub. In the wooden basin, half of the water was put, and a smaller clay pot was taken and filled with water.

After doing all this, Du Qi took out the Saltpeter he bought and threw the Saltpeter directly into the water. When Saltpeter enters the water, it reacts with the water and quickly absorbs heat.

So much so that there was smoke from the clay pot. As the heat continues to be absorbed, naked eye can see that ice flowers have appeared in the clay pot. After a while, the water in the clay pot has condensed into ice, revealing a biting chill.

This is the result of Saltpeter.

In fact, now, Gunpowder has not been invented for the time being, and Saltpeter, which is one of the raw materials of Gunpowder, will not be banned, so the official use of Saltpeter is small, and it can be used by ordinary persons. Bought. When Gunpowder is invented, Saltpeter, as one of the raw materials of Gunpowder, will be controlled by the Imperial Court, impossible to sell to ordinary persons in large quantities.

Liu Jian stood aside, looking at the ice in the clay pot, with an incredible expression on his face, muttered: “Noble Son, how is this possible. How could a basin of water become ice directly? , This is the magic of Noble Son?”

“Naturally not!”

Du Qi shook his head and said, “It’s just a trick, not worth mentioning.”

The ice cubes in the clay pot are in good condition.

Such ice cubes are drinkable. If you directly use the ice in the basin that is condensed due to Saltpeter’s absorption of heat, it contains Saltpeter and is not drinkable.

This is exactly the case, it is necessary to put the clay pot in the basin.

However, this kind of ice making is not easy to manufacture on a large scale. It can only be made in small batches.

It can only satisfy your own needs.

Du Qi looked at the ice cubes coming out of the manufacturer with a smile on his face. Because the condensed water turns into ice, it is not easy to take it out of the clay pot directly. After all, the expanded ice cubes are tightly attached to the edge of the clay pot.

Fortunately, the weather is hot, the sun is shining, and the temperature is extremely high. After a while, the ice on the edge of the clay pot has begun to melt. As soon as I picked up the clay pot, the round ice cubes inside rolled out of the clay pot.

Du Qi asked Liu Jian to take the saw, clean the saw, and quickly saw the ice cubes into pieces. Looking at the ice cubes, Du Qi instructed: “Liu Jian, get some honey!”

“Yes!”

Liu Jian took some honey back.

Du Qi took a cup, poured warm water into the cup, added some honey, and finally took out a few ice cubes and threw them into the cup. As the temperature of the ice cubes diffuse, the temperature of this glass of water drops for a while, and it already reveals the sweetness of refreshing.

In this hot day, taking a sip is really cool.

I feel refreshed all over.

When Liu Jian saw this, he immediately followed suit. For him, this is extremely rare. When he tasted a bite, he was shocked and said: “Noble Son, this ice water is really cool. In summer, a glass of cool ice water is really cool. Noble Son, this ice Do you supply water to the restaurant?”

“Yes!”

Du Qi answered immediately.

He thought about it, instructed: “Ice water can be seasoned with honey. This is a way. In fact, in addition to the current fruit juice, you can just squeeze the fruit, and then Mixed with ice cubes, the taste is also superb. Various styles are needed in the restaurant, and this arrangement will surely prevail.”

Liu Jian heard it brightly and said: “Noble Son is wise!”

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Du Qi and Liu Jian, each drinking a glass of ice water, enjoying the coolness of this summer. When the two were drinking water, they saw a silhouette entering the courtyard gate.

The person here is Li Yuan.

He entered Xiao Li with an urgent expression on his face. Li Yuan came to Du’s house through a private visit on WeChat. However, as soon as he entered Du’s house, he revealed his identity, so that the servants in the house would lead the way to the backyard without reporting.

When Li Yuan saw Du Qi, he was a little puzzled when he saw Du Qi’s hand, he was drinking with a cup in his hand, and looked intoxicated and comfortable. On this hot day, a cup of water is going down, and the whole body is hot, very uncomfortable, there is no comfort.

Just Li Yuan looked aside and saw the ice on the ground, stared wide-eyed immediately.

Ice cubes!

Du Qi actually made ice cubes.

Be aware that even with the background of the Imperial Family, there are few ice cubes. After all, in this hot weather, even the ice cubes stored in the ice cellar are not easy to preserve. The ice in this ice cellar occasionally rewards officials a little, which is the favor of the heavenly family.

Li Yuan knows very well that although Du Qi is young, he is very good at making food. So when I saw Du Qi drinking happily, I knew it was not pure ice water, opened the mouth and said: “Du Erlang, what are you drinking?”

Du Qi’s eyes widened, some accident.

Why did Li Yuan come?

In particular, Li Yuan, as the emperor of a country, came to Du’s house, which was unexpected. He came back to his senses and opened the mouth and said: “His Majesty, the youngster couldn’t stand the hot weather, so he got some ice cubes out. The ice water, with some honey added, tastes good. His Majesty, would you like a drink?”

“Of course!”

Li Yuan didn’t even think about it, so he just answered.

Du Qi immediately prepared a glass of honey ice water for Li Yuan, handed it to Li Yuan, and said: “His Majesty, please! But this honey water contains ice cubes, which is quite cold . You can drink less, but not more. If you drink too much cold, it will irritate your spleen and stomach.”

Li Yuan nodded: “I know!”

He took it up Cup, take a sip.

A mouthful of ice water, the sweet taste of honey blooms in the taste buds, and the cold honey water rolls in the stomach. Originally, Li Yuan came out of the palace, even if he took the Carriage, but the whole body was hot , Very uncomfortable. But this bit of cold honey underwater makes the whole person feel comfortable from the inside.

The heat in the whole body disappears, and there is no more uncomfortable feeling, but the comfort from the inside out.

It’s refreshing!

Li Yuan put out a long breath for a long time, took another sip, looked towards Du Qi, and asked: “Du Erlang, you can manufacture ice cubes, it’s not simple, it’s a strange idea Wonderful idea. Add ice in honey water, the taste is out of the ordinary. However, the ice cubes you manufacture are not like those taken from the ice cellar. How did you make the ice cubes?”

Du Qi pointed to the ice cube on the side and said, “His Majesty, this is the ice cube from youngster manufacture. The secret recipe is also nearby.”

Li Yuan didn’t understand for a while. Asked: “Du Erlang, how do you make ice?”

Du Qi said: “Reporting back to His Majesty, the youngster uses Saltpeter to make ice. Add Saltpeter into the water and it can be made Ice cubes.”

Speaking, he took out some Saltpeter again, refilled the clay pot with water, put it in the basin, and put it in the Saltpeter again. As Saltpeter enters the water, for a while, the mist rises, Saltpeter quickly absorbs energy, and ice flowers quickly appear in the water.

Further, it condenses into ice cubes.

After a while, the ice cubes formed.

Li Yuan was amazed when he saw it, “Erlang, how did you learn about this method of making ice?”

Du Qi explained: “Reporting back to His Majesty is just recorded in an unknown ancient book. Youngster didn’t know this method before, true or false. After all, he hadn’t tried it. But now, the experiment is successful, and this method is indeed feasible. “

Li Yuan asked, “Erlang, can you make ice on a large scale with your method?”

This is what Li Yuan expected.

If ice can be made on a large scale, then there will be no need to suffer from the heat on a hot day.

“No!”

Du Qi shook his head and replied: “His Majesty, on the one hand, to make ice on a large scale, Saltpeter must be mixed with water, but who will Saltpeter mix with? The situation is inedible. On the other hand, large-scale ice production requires more water. To this extent, it is not possible for a few Saltpeters to turn a large amount of water into ice cubes, so It’s difficult. Nowadays, it only makes ice in a small area.”

“Hey…”

Li Yuan sighed.

If ice can be made on a large scale, it will be of some use to Li Yuan. Unfortunately, this is also a small-scale ice making, for Li Yuan, there is not much use value.

Under such a premise, Li Yuan will not intervene. Du Qi can manufacture, that is Du Qi’s ability. He doesn’t care, and he doesn’t bother to care. After all, there is an ice cellar in Li Yuan’s palace, and there is no shortage of ice.