Xia Yanqing comforted Mr. Bai and said, "There will be a way, sir, let me think about it." ”

She is also thinking about temperature these days, and there are various forms of thermometers in modern times. The temperature of firing pottery and glass, more than 1,000, close to 2,000, can only be used for sound wave and infrared temperature measurement, right?

But in this era, where to find sound waves and infrared?

At this time, the ancients probably did not have a very systematic concept of temperature measurement, so the heat of the kiln could only rely on the experience of the kiln master.

But she is making pottery in the back house, and the banner she pulled out and fired pottery is used to cultivate sentiment, and it is impossible to ask the master of the kiln to come into the house to help watch the fire.

Xinxiu and Qiao'er, who were standing on both sides, were hit by the successive failures in the past few days, and they had already lost their earlier excitement. I heard that firing pottery still needs to master the heat, and the little hope in my heart is gone.

The heat of the kiln, how do you look at it? It's not boiling water for cooking, it's boiling water and the oil is hot, you can see it with your eyes.

How hot is the pottery stove?

Mr. Bai was also disappointed, she sighed, and said, "A few of us, I'm afraid that it will be difficult to accumulate experience in a short period of time." Alas, it is better to burn a few more furnaces, and the best people who watch the fire can also be fixed, so that it is easy to accumulate experience. Next, I'll burn the kiln with Qiao'er. ”

"How?" Xia Yanqing shook his head and said, "How can Mr. Labor do this?" Until there is a good way, let's stop burning for the time being. ”

If it is all based on the master's experience, where can she still make glass on a large scale? A small workshop is not her ideal.

Mr. Bai misunderstood what she meant, and said hurriedly: "Didn't the second grandmother listen to what Qiao'er Niang said?" This work has to be done often, and when you are familiar with your hands and have experience, you can see the firing heat. How do you pause? ”

She didn't know if the glass could be made, but she saw a business opportunity in the raw pottery embryos they made these times.

The gadgets that the second grandmother had in mind were all very novel and interesting. Even if the glass is not successful, it is to make small pottery toys and open a store dedicated to supplying the rich and rich, which can still make a lot of silver.

Seeing that the master's family was in trouble, the eldest daughter-in-law said tentatively: "Mr. is a scholar, so it is not good for him to make a living. Or, when the kiln was burned, the second grandmother called the slave and maid in, and the slave and maid took Qiao'er to burn the kiln. ”

Xia Yanqing had this intention, and said with a smile: "We are really short of manpower here, and when we open the kiln again, we will call you in to do things." ”

Seeing Da Zhuang's daughter-in-law agreeing loudly, she turned to Mr. Bai again: "Don't worry, I have a vague idea, wait until I find a book to read, and then we will discuss." ”

As she spoke, she thought back to the temperature measurement she had learned, as if there was a type of expansion. One of them is to use the different thermal expansion coefficients of two different materials to achieve the purpose of temperature measurement.

However, the accuracy of this method of measuring temperature is very low, and in modern times, it has no value for widespread application.

Now, the furnace fire does not need to be very precise in temperature, and that measurement method should be sufficient.

After dinner that day, Xia Yanqing took the books and went to Mr. Bai's yard to check them.

When she came here, the most thing she sent her companion to do was to search for books everywhere.

There are very few books on the market, but they are not nothing, and she also has a well-read brother, so she really bought a few books.

Mr. Bai has high hopes for the firing of pottery.

She herself has no choice, but seeing that Xia Yanqing seems to have a goal, she doesn't dare to disturb at the moment, she just holds a book to read, but she is thinking in her heart that if there is really no other way, maybe she can hire the family members of the pottery master, it is better than them running around here.

Xia Yanqing had already remembered the simple way of measuring temperature, and she was not pretending to look through the books at Mr. Bai's place. She's trying to find a reason for herself, a theoretical source for making a small part of the temperature measurement, even if it's only a little relevant.

After flopping for nearly two hours, Xia Yanqing felt that he was scanning the traditional characters, and was about to vomit by the unfamiliar complicated fonts, only to find a paragraph about forging metal in a book used within the Ministry of Industry of the Imperial Court.

She put down the book and let out a long breath, what the hell, it turns out that it is so difficult to be a crossing girl.

Over there, Mr. Bai had already noticed that Xia Yanqing was looking up from the book, and she asked lately, "Second grandmother, has you found a way?" When questioning, Mr. Bai himself didn't believe that Xia Yanqing could find a way in such a short time.

But this second grandmother is really smart and aura, and she has given her too many surprises, and she sincerely hopes that her aura can be more reflected.

Xinxiu was originally sitting on a small stool at the door, she didn't move for a long time, and her master didn't tell her to do things, she was already drowsy.

Suddenly heard Mr. Bai speak, and the little girl immediately sobered up: Huh? Second grandma has thought of a way?

She pushed Qiao'er who was leaning against her, did there be hope for their favorite gadgets?

Xia Yanqing nodded, but the tone of the answer was not very sure, "I think it's okay, but I still have to find a blacksmith to make it, and I can only determine if it can be used after trying it." ”

She raised the book in her hand, "There is a description in it, saying that if metals of different materials are used in engineering at the same time, they need to consider their different telescopic lengths when they alternate between hot and cold. ”

The temperature measuring component is used to measure the temperature by using the different degrees of bending caused by the different thermal expansion of two different metals.

It's just that the thermal expansion of the metal is limited by temperature, like five or six hundred degrees. The temperature at which the glass and pottery are fired is more than 1,000 degrees.

But at the moment, it seems that only this one can be used. Moreover, the temperature measurement component does not need to be placed in the kiln, if the component is installed outside the kiln, it should be enough to do some temperature compensation.

As for the other radiometric thermometers of several thousand degrees, it is impossible to think about it, and it is completely impossible to achieve.

The reason why Xia Yanqing did not give a positive answer was because the alternating expansion and contraction of metal and metal hot and cold was not universal knowledge in ancient times, not to mention that she was a woman who grew up in the countryside.

Mr. Bai had some hope, she stood up, came to Xia Yanqing's side, and looked at the contents of the few pages of the book she pointed out to her.

Then, it was found that ...... She couldn't read it.

"Can the second grandmother understand what is written here?" Mr. Bai asked.

She knew all those words and could pronounce them, but she just didn't understand what those sentences were talking about.

"Yes, there's something I can't understand." Xia Yanqing opened his big clear eyes, and his answer was natural.

She is a modern person and has studied physical chemistry, so I am very sorry for Mr. Bai, she is like this, as if Mr. Bai has a very poor understanding and lack of knowledge.

The construction of this temperature measurement is very simple, the two sections of copper and iron are fixed, and when the temperature rises and cools, the thermal expansion coefficients of copper and iron are different, and the length will be different. Since the two sections are fixed, the member will bend. According to the amplitude of the bending, the temperature geometry is determined.

Xia Yanqing explained her thoughts to Mr. Bai.

After listening to this, Mr. Bai was full of incredulity: "What does the second grandmother mean is that the hot iron and copper will become bigger?" No, I don't. "When she hadn't seen anything of brass and iron?

Xinxiu was in the main hall and they were talking, and their eyes widened in astonishment, and they also glanced at the teapot in the corner of the room. They use a copper kettle to boil water every day, where will the copper kettle get bigger and smaller?