Iron Dynasty

Your Majesty, this is what you want.

In the glass workshop, the workshop supervisor handed a short glass rod to Xiao Ming, and there was a clear white mark in the middle of the glass rod.

This thing is the purpose of Xiao Ming coming here, he is the thermometer.

The earliest thermometer in history was invented by Italian scientist Galileo Galilei in 1593.

This thermometer has an open glass tube at one end and a glass bubble the size of a walnut at the other end. When in use, the glass bubble is heated first, and then the glass tube is inserted into the water.

At this time, with the change of temperature, the water surface in the glass tube will move up and down, and the change of temperature and the level of temperature can be determined according to the amount of movement.

It can be said that the thermometer at this stage was filled with water. Then, in the seventeenth century, France reduced the volume of the glass bubble and changed the temperature measurement material to mercury, which is the prototype of the later thermometer.

Then the Dutchman Wallen Hite used alcohol in 1709, and in 1714, used mercury as a measuring substance to create a more accurate thermometer. This is the development of thermometers.

With the birth of the thermometer, the standards for Celsius and Fahrenheit were also born.

Although the thermometer is only a small invention, this small invention is very important, because only the thermometer can test the specific temperature value.

In fact, this kind of mercury-in-glass thermometer is not so precise and complicated. The steps are generally to manufacture a hollow glass tube first, which is not too difficult for the current glass workshop.

As for the mercury bubbles and the small bubbles that act as a partition in this thermometer, they are nothing more than glass blowing skills.

After the glass rod is made, it is filled with mercury, and then the glass tube is heated and sealed in a low pressure environment, and the sealing can be heated.

At this time, the mercury part is at the other end, and the thermal conductivity of the glass is not good, so it basically does not affect the mercury. After these actions are completed, the scale is marked. This work is also very simple because Xiao Ming has a ready-made standard reference. It only needs to follow the modern The Celsius standard can come.

And he is also ready to adopt degrees Celsius as the future temperature standard for the Great Yu Kingdom.

Now the thermometer in his hand is used to measure the temperature of the human body. His purpose is to use the human body thermometer to establish the temperature standard of the Great Yu Kingdom, so that he can produce industrial thermometers and still promote the temperature standard.

In his view, whether it is the steel industry or the smelting industry, the temperature control of the production process is very strict, and accurate temperature control can improve the quality of industrial production.

Therefore, after the human body thermometer, what he wants to produce is an industrial bimetal thermometer. This bimetal thermometer works on the principle that two different metals expand differently when the temperature changes, and can be used to detect the temperature during industrial production.

This kind of thermometer usually makes the metal sheet into a spiral coil shape. When the temperature of the multi-layer metal sheet changes, each layer of metal expands or contracts by different amounts, which causes the spiral coil to roll up or loosen.

Because one end of the spiral coil is fixed and the other end is connected with a pointer that can rotate freely, when the bimetallic sheet feels the temperature change, the pointer can indicate the temperature on a circular graduation scale.

For him, this kind of thermometer can be produced in Qingzhou at the current stage. As for advanced resistance thermometers, it is still out of reach, but for him, it is enough to use, and he only needs to hand over the structural diagram of the metal thermometer to the watchmaker. , this is not a problem for watchmakers who can create pendulum clocks.

By the way, what about the microscope? Xiao Ming asked.

This time, he not only assigned the glass workshop the task of producing thermometers, but also the work of making microscopes.

Compared to the telescope, the microscope is at the other extreme, and he's going to manufacture it and send it to medical school.

Wait a minute, Your Majesty, this microscope was made by another group of craftsmen, it will be here soon. Fang Jian said, and just after he finished speaking, a craftsman came to him with a microscope.

Like the monocular, the microscope in the hands of the craftsman is full of the quaint flavor of the 18th century, with glass lenses and metal bodies.

After getting these two things, Xiao Ming was satisfied. He said to Qian Dafu, Let's go, go to the medical school, and let this Huang Tingzhi understand how powerful I am.

Xiao Ming was happy, and Qian Dafu was also happy. Although he didn't know the use of these two, it must be a powerful thing judging from Xiao Ming's expression.

After leaving the glass workshop, the two went directly to the medical school.

After splitting up Bowen College, Xiao Ming found another place for the medical school, not far from Bowen College, that is, the distance between two private squares.

The high mortality rate of wounded soldiers in this Northern War made Xiao Ming have to pay attention to the development of the medical school. If medical technology could keep up, the soldiers would not have been reduced so much.

In the future, the Great Yu Kingdom will face more wars, and it is very important to cultivate a group of refined medical officers at this time.

When he arrived at the medical school, Xiao Ming went directly to the medical clinic established in the medical school. On weekdays, Huang Tingzhi would also treat the people here while teaching the students.

Your Majesty. Huang Tingzhi was quite surprised by Xiao Ming's arrival, and he immediately got up and saluted.

Xiao Ming asked Huang Tingzhi to avoid the ceremony. He took out the thermometer and microscope and said to Huang Tingzhi, Old Huang, I came here today to give you two sharp weapons.

Huang Tingzhi was a little stunned. He looked at the glass rod in Xiao Ming's hand, and then at the microscope, confused: Your Majesty, what are these?

Thermometer and microscope. Xiao Ming said, he was not surprised that Huang Tingzhi did not know these, because now Huang Tingzhi is still learning a few medical classics he gave him, and he has not touched anything in the West yet.

This... Huang Tingzhi was still a little confused.

Xiao Ming said: How does Huang Lao usually judge whether a person has a cold or not?

Naturally, it's all about seeing, hearing, and asking.

Xiao Ming said sternly: With this thing, I don't need to look and hear to know if this person is sick?

The emperor is joking, you don't need to look and hear it, how could the emperor know? Huang Tingzhi suddenly laughed when he heard the words.

Xiao Ming knew that Huang Tingzhi was very confident, so he was always worried that he would be dismissive of Western medicine, so this time he personally came over to let Huang Tingzhi experience the unique medical skills.

Hearing this, he said, Old Huang only needs to take this thing to measure the temperature of the patients in the medical officer.

Then Xiao Ming explained the principle of the thermometer, and briefly explained the knowledge of human body temperature.

Holding the thermometer, Huang Tingzhi's expression was very shocked, and he tested the temperature of every patient in the hospital with suspicion.

When he saw the temperature records of each patient, he was stunned.