The control group of the ancient heroine

two days ago

Although saltpeter can be used to make ice, Qin Fang heard Li Daji mention it before that saltpeter is a medicine that can improve the properties of medicine, and saltpeter can also be used to make firecrackers, so Qin Fang is still more cautious about saltpeter. No matter who you are, you are always very strict about medicine. Even if the medicine is taken into the mouth, everyone will be worried.

Therefore, after finding out that saltpeter can make ice, and after Qin Fang and Yang Haiyan told the court about this method, they naturally faced this method with a more serious attitude.

Qin Fang said: "Although saltpeter can make ice, we don't know how well the ice can be made. For example, sulfur, Li Daji said, sulfur and its smell are poisonous, and it is dangerous to inhale excessive amounts, so when faced with Saltpeter, we should also pay attention. I will go to the longevity Taoist temple in Beast Mountain to ask Li Da."

After hearing this, Yang Haiyan felt hot in her heart. It would be great if Qin Fang could think of the problem. She had read novels before and after learning that saltpeter could make ice, she curiously checked it online.

She read information on the Internet that saltpeter is poisonous. Although it is slightly poisonous, if it is overdosed, it will be harmful to the human body. So saltpeter can be used to make ice, but here, she is a woman who accidentally discovered that saltpeter can make ice when she was washing her hands. How did she know that saltpeter can make ice and it is water-proof? Therefore, in today's experiment, she did not make ice through water, nor did she tell Qin Fang.

Yang Haiyan's original plan was to wait for the experimental success of making ice from saltpeter, then vaguely remind Qin Fang and ask him to ask Li Da whether the ice made from saltpeter was edible. As a big man, Li Da naturally knew that saltpeter was slightly poisonous, so he would tell Qin Fang that saltpeter could be used to make ice directly and was toxic. After that, they will definitely think about how to make ice made from saltpeter non-toxic. While thinking about the method, they will naturally come up with the idea of ​​making ice through water.

But she didn't think about it. She hadn't brought it up yet, so Qin Fang thought about it by himself. Yang Haiyan said: "Then you go ahead. My husband is still careful. I have paid attention to these things."

Qin Fang was obviously happy to be praised by her. He grinned with his teeth exposed. After a while, he pursed his lips again: "Then I'll go."

It was already time for dinner. Qin Fang didn't have dinner and went to Beast Mountain immediately. When we arrived at Beast Mountain, it was already dark, and the Taoist temple was brightly lit. As long as we could see the Taoist temple, we knew there were people there.

As soon as Qin Fang visited the Taoist temple, he went to Li Da: "Li Da, I have something to ask you and I would like to lend you a moment."

Seeing how cautious Qin Fang was, Li Dajing followed Qin Fang to the secret place and said, "Dare you ask me? Do you know what the general wants to ask? But is it related to medicine?" The only thing that the general could ask him about was this medicine.

Qin Fang said: "It is indeed medicine, related to saltpeter. Today Zhuojing invited a master to make firecrackers with sulfur and saltpeter. He thought that during the New Year and the holidays, the house could set off firecrackers to make it fun. However, by chance, she Another discovery of saltpeter is that it can be used to make ice."

Li Da was shocked: "What?" Because he was so surprised, his voice also amplified consciously. Ice is a luxury only for ordinary people, but it is also a luxury among aristocratic families. The quantity of ice in many families is regulated, and it is not that aristocratic families can afford it, but there is not so much ice supply. They sell.

But if saltpeter is used to make ice, the price of ice will probably plummet.

Qin Fang added: "This matter is not trivial. I am going to inform the court, so I ask Li Da to keep it secret." Before the court makes this public, it would be really good if it is revealed.

Li Da 꽬 said: "General, don't worry, the common people know what they know. The general wants to ask if it is safe to make it from saltpeter, yes or no?"

Qin Fang said: "That's true. You said before that saltpeter is medicine, so I know whether this medicine can be used to make ice."

Li Da asked: "General, can you tell me how saltpeter is used to make ice?"

This is a problem, so Qin Fang told the truth: "Put the saltpeter directly into the water, wait for half a day, and the water will freeze. There can be too little saltpeter, and there can be too much water. There is a certain amount. Saltpeter can lower the temperature of water. As time goes by, the temperature of the water gets lower and lower, and it freezes. "This is probably the case. Qin Fang also understands the specifics.

Li Dajian hesitated and said: "If that's the case, then the saltpeter itself is also in the ice. Saltpeter is poisonous. It comes into direct contact with water and then turns into ice. It can be seen that the toxicity of saltpeter is also involved, so this ice is It can be used to make ice with so much water, and less saltpeter is needed. A little bit of saltpeter will cause little poison, but if there is too much saltpeter, the poison will be too much, so this kind of ice making Method, Bing can definitely do it.”

Qin Fang thought for a while: "You mean, as long as ice and saltpeter are not in direct contact, and the toxicity of saltpeter is not dissolved in the ice, then ice can be used?"

Li Da 꽬 thought about it, and it seemed to be the truth: "But I won't know until I check it."

Qin Fang said: "It's simple. Just follow me back home. I have a solution."

Li Da: "Yes."

Then, the two returned to the general's mansion.

It was already evening now. As soon as Qin Fang came to his house, he asked someone to bring a big basin and a bowl. Fill the big basin with water, and the bowl with water, then put the bowl into the big basin, and then put saltpeter in the big basin.

When Yang Haiyan learned about it, she couldn't help but ask: "Ms. sir, what are you doing?"

Qin Fang explained: "Li Da꽬 said that saltpeter is poisonous. Saltpeter is placed directly in water to make ice. This ice probably also contains the toxicity of saltpeter, so I think that if the saltpeter is separated from the water, If the water turns into ice, will it be no longer poisonous? "

Yang Haiyan was stunned, looking at Qin Fang with incredible eyes. Speaking of which, because of the relationship between time travel and traveling through books, she has a sense of superiority that some modern people have in her heart. Especially after reading the book and learning the plot, she knew who she could socialize with. For example, when she was at the border, she went to the prince's shop to sell soap prescriptions. But only now did she truly appreciate the wisdom of the ancients. No wonder saltpeter ice was discovered in ancient times.

The achievements of modern people are perfected on the basis of ancient people, but there is no data for the achievements of ancient people. They all figured it out by themselves. For example, the ancients were precocious and enlightened, but at that age, what were modern people doing? The child on the foundation is still being pampered. For example, Yang Haiyan herself also loved her very much when she picked her up.

But now, she finally understands that she has always looked down on the ancients. There was a good feeling in her heart. It was the first time she met 누. Her mentality and thoughts all along were somewhat wrong.

Seeing Yang Haiyan looking at him with eyes wide open, Qin Fang was a little scared. He asked cautiously: "Yanyan, what's wrong with you?"

Yang Haiyan walked in front of him, looked at him quietly for a while, then opened her hands and hugged Qin Fang: "Ms., you are so smart."

Qin Fang was bored, what's going on? Although he was happy to be praised by his wife, he was even happier to be hugged by his wife. However, he is a little worried. "Yan...Yanyan, don't scare me."

Seeing his nervous look, Yang Haiyan really laughed and cried. She stared at Qin Fang's face with her big eyes, grabbed his hand with both hands, and said seriously: "Ms. sir, I really think you are smart. Look, Li Da꽬 said that saltpeter is poisonous, and it can If you make ice directly, you will think of making ice through saltpeter. Why are you so smart?"

Qin Fang weighed the meaning of her words. Looking at her, she seemed to be deliberately making him happy, but she was praising him seriously. So, Qin Fang snorted, concealing his inner joy, and said seriously: "Yanyan is praised, Yanyan is so smart, why if she is too stupid, how can she be worthy of Yanyan?"

Yang Haiyan: "..." Suddenly she knew what to say, this person is poisonous.

It takes half a day to make ice from saltpeter, about two hours. Two hours later, it was already midnight, and the saltpeter had frozen. Qin Fang sent someone to call Li Da, who was back home waiting for the results. Li Da was shocked by the news about making ice with saltpeter, so he kept waiting without sleeping. Now Qin Fang sent someone to tell the news, and he immediately Went. Although it's somewhat appropriate to go to the inner courtyard, it's okay since the general is here.

When Li Dajin entered the house and saw the ice in the basin and bowl, he was really shocked again. As General Qin said, saltpeter can really make ice.

Qin Fang said: "Li Da, you see, I put the saltpeter in the basin, so the ice in the basin is with the saltpeter, but the ice in the bowl is not stained with saltpeter, because there is a bowl between it, you Look, both types of ice are poisonous with saltpeter?"

Li Da 꽬 said: "Okay, let me check it out."

Li Daji took some ice from the basin and the bowl. At present, the ice in the basin and bowl has just formed and is solid, so it is quite convenient to take out the ice. A quarter of an hour later, Li Dajin told Qin Fang the verification results: "General, the ice in the bowl is non-toxic and can be eaten, but the ice on the plate is slightly poisonous."

Qin Fang's face was filled with joy: "Yes."

Not only Qin Fang was happy, but even Li Da was also happy: "It's a pity that saltpeter mines are accessible to the common people, and there are many saltpeter mines. However, if this method of making ice is popularized, the common people can also afford it." It’s iced.”

Making ice with saltpeter can reduce the cost of making ice, but saltpeter is difficult to find. In ancient times, ordinary ores were easy to find. Maybe the firewood has already been flying all over the sky.

Qin Fang said: "Indeed."

Listening to their conversation, Yang Haiyan suddenly thought of boiling salt in sea water. Salt can be boiled from sea water, but saltpeter can be boiled from ice water? Saltpeter is the same as salt, but they are both crystallized. If saltpeter can be boiled in ice water, then the saltpeter can be used repeatedly. In this way, the common people only save some saltpeter and can go on the ice every year.

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