Saltpeter dissolves in water and absorbs a lot of heat, which is the principle of saltpeter ice. Thanks to his previous experience of reading novels, Liszt knew a lot of similar common sense.

And he also knows that saltpeter can be reused over and over again.

"Saltpeter is a miraculous substance that dissolves in water and then makes the water very cold until it freezes. Liszt instructed the valet to pour the white powder into the basin.

Then you can see the powder melt gradually.

Tom put his finger into the water and exclaimed in surprise, "Master, master, the water, the water is really getting cold, it's so cold!"

Galtai squeezed Tom away, curious and hesitant, and finally put his finger in: "It's indeed much colder than before, Liszt, is this a magician's method, I once saw a magician who was good at ice magic, he always made a lot of ice cubes in the summer to make money." ”

However, after waiting for a while, the water only cooled down a little and did not freeze.

"Liszt, why didn't it turn into ice?"

"Mr. Galtai, saltpeter ice is not such that a little powder is enough, and now it only proves that they are indeed saltpeter. Liszt smiled faintly, "Then, at the same time as the stone, collect all these saltpeters and send them to the castle, so as not to miss anything." ”

"Okay, I'm looking forward to the moment when you make the ice, there is ice in the summer, this is what nobles should enjoy. ”

Tomorrow is the Sailing Festival, and the castle will host a banquet.

Night.

Looking at the saltpeter powder collected in a day, which was enough for a wooden barrel, Liszt excitedly instructed his servants to start making real saltpeter ice.

Saltpeter dissolves in water and releases heat, which turns water into ice.

However, the ice water that melts saltpeter directly is poisonous, so it is necessary to prepare a tank and a copper basin with good thermal conductivity. Put water in the jar, put the copper basin into the water, and put the copper basin into the jar again. Saltpeter is poured into the tank water and waits for it to dissolve and absorb heat, turning the water into ice.

Because the saltpeter powder prepared is very sufficient, the dissolving and endothermic effect is super strong.

Within a quarter of an hour, the water in the jar began to condense slowly, and after a while, even the water in the copper basin began to freeze.

"It's freezing!"

"It's really freezing!"

"A magical scene, this is the method of the legendary alchemist!"

Marcus, Galtai, Isaiah, and Blair, who were watching from the sidelines, were amazed that in their impression, there was only ice in winter, and the nobles built ice cellars to enjoy the pleasure of ice in summer. But the ice cellar was a luxury, and the wealthy lord was able to organize a large ice-collecting team in the winter to dig ice from rivers and lakes.

A down-and-out aristocrat like Galtai can only taste a few ice cubes at Tulip Fort every year.

Marcus, Blair, and Isaiah weren't even eligible to taste summer ice.

Liszt was just as excited, he had heard of saltpeter ice, but it was the first time he had made it. Seeing the water turn into ice with your own eyes is shocking.

"Master, it's ice. Thomas sat around the vat, his eyes shining.

"Get the ice. Li Sty nodded, maintaining a reserved aristocratic smile on his face, unfazed, and bearing, "Cut the ice cube into small pieces, and each of the gentlemen and ladies can get a small piece of ice tonight." ”

Carter whispered, "Master, the ice cubes are too valuable, the servants don't need them, right?"

"It's okay, Mr. Carter, just do as I say. ”

"Yes, sir, for your generosity, I pay you the most sincere respect on behalf of all my servants. "Carter bowed and saluted, and it was indeed the servants' luck to meet a generous aristocratic lord.

With that, he instructed Thomas to carry the ice cubes from the copper basin into the kitchen and start cutting.

Liszt called Tom again: "Keep this jar of ice water, and take it out to dry it tomorrow when the sun rises, so that not a drop is wasted." ”

Galtai was puzzled: "Liszt, what is the reason, these ice can be used for good, why do you have to dry them?"

"Saltpeter melts directly from the condensed ice, of course you can use it, but you can't eat it. When they are dried in water, they turn into saltpeter, which is then used repeatedly to make ice. ”

"Is saltpeter so magical?"

"It's far more amazing than you think. Liszt thought to himself - if he found brimstone, he would dare to prepare black powder now.

Perhaps compared to yellow powder, black powder is not strictly considered explosives, but it is still a flammable and explosive high-explosive product. It is suitable for making some earth bombs, and the power is at least not weaker than the magic released by low-level magical beasts. When used in low-level battles, it is still very unexpected.

Of course, in a world where dragons, elves, and magic exist, black powder has no decisive advantage.

The dishes at the dinner were not rich, and Liszt was reluctant to entertain Galtai and others every day, and the materials of the castle were his personal luxury life guarantee.

The drinks are also relatively poor, all of them are sour beers without hops.

But the atmosphere of the banquet was high, because everyone had a few pieces of crushed ice in their cups. The ice cubes melt, the whole glass of beer becomes cold, and when you drink it in one gulp, the whole person instantly cools and brightens your heart, which is definitely the best enjoyment in this increasingly hot weather.

"Liszt, I propose, a toast to a cold beer!" said Galtae, raising his glass with a smile.

Liszt picked up his glass and responded: "Then for the cold beer, cheers." ”

"Cheers!"

The sound of gulping beer rang out at the table.

......

Kitchen.

on the dining table.

Erin kept fiddling the ice cubes on the plate with a spoon, making a rattling sound.

Abi Soup Spoon couldn't help but scold: "Erin, stop making ugly sounds, don't hurry up and eat the ice cubes that the lord rewarded you!"

"I prefer to watch it melt rather than eat the ice, Mrs. Abbie, don't you think the temperature in the kitchen has dropped to-day. Erin Fourfingers continued to play with the ice cubes and looked at Lily Bath in the next seat, "Little Lily, do you feel it?"

"Of course, each of us had ice on our plates. As she spoke, little Lily stuck out her tongue and licked the ice cubes in the spoon, and she was reluctant to eat them all at once.

The ice cubes don't have any taste, but they are cool and feel very comfortable, so that the heat of the whole person has subsided.

Abi said angrily, "Little Lily, I don't allow you to talk to Erin during dinner, your clumsiness, and rude eating will only disgrace the kitchen!"

"Ahem. ”

The butler Carter bit the ice in his mouth hard, he was in his fifties, but his teeth were still very good: "Mrs. Abi, they are still children, allow them to be a little rude when they eat." ”

"Mr. Carter, it's not that you don't listen to you, but you shouldn't indulge them, they will be lawless. Clumsiness is disappointing enough, and if they don't learn even a little bit of etiquette, they'll stay in the kitchen for the rest of their lives, and they won't be able to become maids upstairs. Abi said seriously.

Carter and Mawson looked at each other, and they both knew that Abi was a good man with a hard mouth and a soft heart.

However, Erin was obviously not convinced: "Mrs. Abi, I don't want to go upstairs, I don't feel comfortable upstairs at all, I have to be careful not to leave even a footprint." I'm going to be a chef in the future, and I love working in the kitchen. ”

"You're going to die for this heart!" Abbi suddenly burst into flames, "With me in the kitchen, you should never want to be a cook, little girl, remember, don't offend me!"

"But you'll grow old one day. ”

"Even if I get too old to do it one day, the cook is still me, and you have to listen to what I say!"