At the military medical camp, Tian Bu and a group of other military doctors selected dozens of young and strong men who were willing to participate in the drug trial.

People heard that the medicine was to be tested and that it was made by military advisors. Because Li Mengxi's reputation was so good, the people rushed to participate without any hesitation.

Tian Bucong arranged several tents and found several remote places in the city, and separated each group of ten people who participated in the test.

After the people were settled, Tian Bu left behind the cooking utensils for cooking, bowls, and three or four days' worth of food.

He told everyone to eat in the tent and not to go out at will.

After everything was arranged, Tian Bu began to distribute medicines to people one by one.

The peasants were holding bowls to receive the medicine, but Tian Bu only gave each person half a spoonful of white medicinal powder like flour, which was too little. The peasants asked for more, but Tian Bu was not willing to give more.

Tian Bu followed the entire test plan as instructed by Li Mengxi.

The first tent, the tent was in the city, and there were ten people living in the tent. These ten people were all patients who had caught wind and cold, coughed and runny nose. In the first group of ten people, Tian Bu gave each of them half a spoonful of water.

Medicinal powder obtained by boiling willow bark.

To the second group, the second group was at the corner of Dongcheng. The second group also had ten people. These ten people were also infected with the wind and cold. For the second group of ten people, Tian Bu cooked some licorice that was almost useless.

The boiled water was used to trick everyone into drinking the licorice water.

In the third group, ten patients with colds, Tian Bu gave each of them half a spoonful of medicinal powder boiled in lime water.

The fourth group was also composed of ten people. This group was not given any medicine. Tian Bu asked everyone to stay in the tent and not to move without orders.

The fifth group has the largest number of people. This group has a total of thirty people. This group has ten people in each group. Three common prescriptions for treating wind and cold are used in three components.

Tian Bu was looking forward to it. He wanted to know whether the white medicinal powder given by the military advisor was more effective or the herbal prescription.

While Tian Bu was busy testing the medicine, on the other side, the craftsmen from the blacksmith camp found Li Mengxi, and the blacksmiths completed the "heating net".

The blacksmith camp sent a palm-sized iron sheet, with dense holes cut out with a chisel. Li Mengxi took the iron sheet and looked at it. He felt that the iron sheet was like a fly swatter, with many holes.

Such a porous iron sheet fully meets the needs.

The blacksmith asked curiously, "Military advisor, what is this thing made for?"

Li Mengxi thought for a moment, "You'll know in a moment."

The iron sheet is full of holes like a fly swatter. This iron sheet is a substitute for barbed wire. Iron wire is difficult to handle, and the wire mesh is also difficult to handle, so it can only be replaced by iron sheet.

Li Mengxi brought the iron sheet to the craftsman camp, and he recruited some craftsmen.

Li Meng scratched the ground with a small stick and drew a sketch on the ground.

Then, Li Mengxi explained to the craftsmen, "The bellows - connect a long pipe - put the iron plate in the middle of the long pipe - and then connect a section of bent pipe, the bent pipe should be able to extend into the water urn.

Are you clear?" Li Mengxi raised his head and asked.

The stuff is not difficult, you can understand it as soon as you hear it, and the craftsmen all nodded and said they understood.

——

For the next half day, Li Mengxi didn't care much and let the craftsmen do whatever they wanted.

The whole set of heating equipment has the same principle as a hair dryer.

Let the cold air blow through the hot iron mesh, turning the cool air into hot air. The hot air is then led into the water jar along the pipe to accelerate evaporation. The whole principle is like this.

Combined with the existing technology, there is no electric hair dryer, so a bellows is used instead; a small electric heated wire mesh cannot solve the problem, so a porous iron sheet is made with a long handle, and the long handle is placed on the fire to heat

, after the heat is conducted, the entire iron sheet becomes red and hot, which perfectly replaces the function of the electric heated wire mesh.

In response to the task assigned by Li Mengxi, several blacksmiths, several carpenters, and a few idle clay craftsmen gathered together to discuss. The blacksmiths agreed that they should first beat the wrought iron sheets, and then roll the wrought iron sheets.

Roll it up into a tube, and the carpenters said that you can use it like bending a long bamboo with a fire.

As for the clay craftsmen who joined in the fun, they said that iron was too expensive, bamboo was not durable, and clay pipes were durable and cheap.

No one among the three craftsmen could tell the difference, so they went to work separately.

After half a day, the craftsmen finished a set of things.

The blacksmiths rolled long iron pipes with iron sheets. The iron pipes were connected from the bellows. After a section of iron pipe, there was a heating grid in the middle. The long handle of the heating grid was exposed abruptly. There was another section of iron pipe, which bent downwards.

It is no longer straight, and the downward curved section is specially made to match the structure of the pottery urn.

The carpenter also made a heating structure, but the heating structure was made of long bamboo poles.

The potters are still firing the pottery pipe, which has not yet been completed.

Li Mengxi checked the two sets of appliances. The iron pipes were definitely fine, but the bamboo poles seemed not to be. Because the wire mesh needed to be heated, and the bamboo tubes were not heat-resistant and would be burned.

The heating appliance is completed and testing begins.

Get two jars of clean water, put one jar next to it, and put the other jar with a heating device.

Li Mengxi asked someone to bring a fire from somewhere else and put it on the long handle of the barbed wire fence. He used the fire to heat the barbed wire. Soon, the long handle burned red. After a while, the barbed wire was also heated.

Seeing that the warm-up was almost over, Li Mengxi turned on the bellows, which made people huff and puff.

Once the bellows was pulled, the wind blew inward along the iron pipe. After passing through the hot barbed wire, the cold air blew out from the other end. Li Mengxi reached out to the exit and tried it. The wind at the exit was warm.

This is how wind like an electric hair dryer is created.

The craftsman pulled the bellows and kept blowing, and the hot air blew into the water urn. Because he used a wire mesh and did not blow against the charcoal pot, there was no pollution from charcoal ash and it was clean.

of.

Li Mengxi estimated that it would take a long time to evaporate a jar. He folded his arms and waited by the side.

Next to them, the craftsmen were looking at a set of bellows, iron pipes and the like, but they didn't understand what they were looking at.

Behind Li Mengxi, a craftsman touched Li Mengxi's shoulder and asked softly, "Military advisor, what is this for?"

This chapter is not finished yet, please click on the next page to continue reading the exciting content! It is rare for craftsmen to ask questions, so Li Mengxi explained to the craftsmen, "Do you know how to dry clothes?" he asked.

The craftsmen all say they know it.

"Then, when drying clothes, do they dry faster with wind or without wind?" Li Mengxi asked again.

"windy."

"It dries quickly."

The craftsmen answered all at once.

"Yeah." Li Mengxi nodded, "Then, does it work faster when the sun is hot or when there is no sun?"

"Of course it will work faster with the sun," the craftsmen replied.

"That's it," Li Mengxi said, "it dries faster when it's hot, and it dries faster when there's wind. Therefore, when the heat and wind are combined, the water dries faster."

Pointing to the red-hot iron net, Li Mengxi said, "The iron net is hot, and when the cold air passes, it becomes hot air. Do you understand?"

After Li Mengxi said this, the craftsmen understood it.

After understanding this, the craftsmen looked at the bellows, the iron pipe, and the long long thing, and they could understand why they did this.

After a while, a craftsman said, "Hey? Military advisor, you said burning on an iron pipe is the same thing? If the iron pipe is hot, won't the wind become hot wind?"

After being reminded by the craftsman, Li Mengxi's eyes lit up. Yes, why bother just heating the iron mesh? Iron pipes are resistant to burning, so why not just heat the iron pipes directly.

Li Mengxi immediately moved the fire. He moved the entire fire under the iron pipe. The flames burned brightly. Soon, the iron mesh and the long iron pipe were scorching hot.

Li Mengxi once again put his hand to the air outlet and felt it. Sure enough, after heating the iron pipe together, the air coming out became much hotter.

This small improvement has increased the temperature of the wind by an unknown amount.

Li Mengxi felt that this method was very valuable. He immediately took out a pen and paper and wrote down a military ticket to reward the craftsman who reminded him.

The craftsman took the military ticket, was stunned for a moment, and then took it with a smile.

This award has undoubtedly once again strengthened the atmosphere of enlightenment and wisdom in the craftsmanship camp.

——

The effect of hot air drying is excellent. For example, when blowing your hair with a hair dryer, your hair will be dry in a short while. The speed of hot air drying is ten times that of natural drying.

After about an hour, there was a clear difference between the two jars of water.

The jar that was left standing still had the same amount of water, unchanged at all.

As for the urn into which the hot air was flowing, the water had evaporated down to a finger's depth. I put my hand in and tested the water temperature. The water only felt slightly warm, not hot at all. This shows that the water evaporated at a very low temperature.

The temperature of the water is extremely low, which will not destroy the medicinal properties at all. Then check the clarity of the water. Because iron mesh and iron pipes are used for heating, and no brazier is used, there is no charcoal ash blown into the water. Therefore, the water has been blown by the hot wind for a long time.

Still clean and clear.

At this point in the test, there was no need to continue. Li Mengxi had the fire removed and the instruments put away. He told the craftsmen that at least twenty sets of similar instruments needed to be made as spares.

Twenty sets of appliances require twenty bellows. Making bellows is a job for the carpenter camp. The carpenter captain came over and asked Li Mengxi for materials. Li Mengxi frowned and asked, "Do you need chicken feathers to make bellows? Can you use anything else?"

Chicken feathers are not valuable, but if you want to get chicken feathers, you must first kill chickens. There are not many chickens and ducks in the army, and there are not enough chickens and ducks left to lay eggs. Killing chickens to get feathers is tantamount to killing chickens to get eggs.

The captain of the carpenter thought for a while and said, "Leather will do."

Li Mengxi didn't understand very well. He didn't know how the leather was made into a bellows. As a result, after the carpenter explained it, Li Mengxi learned about another blowing instrument.

Li Mengxi learned about something called a tuo (tuo). According to the carpenter's description, this blowing instrument is like a huge balloon. Pump it and inhale the air to expand it. Press it and the air is blown in.

The carpenter said it was very simple, pump it and press it, expand it and compress it, that's it.
To be continued...