Li Yu and Li Li took the ice cubes that had just been made, played with them in their hands, felt the coolness of the ice cubes, and looked at Li An with great admiration. Pen & Fun & Pavilion www.biquge.info

"Li Shilang, this is really amazing, you can actually make ice cubes in summer, what did you just pour into the water?"

Li Yu asked excitedly.

"It's saltpeter! Hasn't King Quang Binh seen it? It's a very common thing! ”

Ang Lee looked relaxed.

"Saltpeter? It's as simple as that, just add saltpeter to the water to make ice? ”

Li Yu and Li Yu were both shocked, they didn't expect that making ice cubes would be so simple, only saltpeter and water were needed, it couldn't be simpler.

"Yes! I inadvertently poured saltpeter into the water, and it turned out that the water froze, and then I knew that the use of saltpeter can make ice, the principle is so simple, there are many inventions, in fact, it is a summary of life, observe life more, you can always invent a lot of interesting things, ice making is one of them. ”

Li An smiled lightly and taught the two of them a lesson.

Looking at the shocked expressions on the faces of the two, Li Ang told them the detailed process of making ice, and told them that the ice cubes in the large clay pot were mixed with saltpeter, which could not be eaten, but could be used to refrigerate and make the room cooler.

This means that saltpeter can be reused and can be used to make ice cubes that keep the summer cool.

"Li Shilang, since saltpeter can be reused, in this way, the cost of making ice is extremely low, even ordinary people can afford to use it, and they can also enjoy the coolness of summer."

Li Li said.

"That's right, the price of saltpeter is not expensive, I also have a lot of saltpeter deposits in Datang, and spreading the method of making ice can indeed benefit the people, it is better for the two of you to dedicate this method to Your Majesty and promote it to the whole world, so that you will become the heroes of Datang."

Ang Lee opened his mouth to suggest.

"Li Shilang, how can this work? You discovered this ice-making method, so how can we take the credit from others? We are not that kind of people, we will tell Your Majesty that the method of making ice was discovered by Li Shilang, and Your Majesty will be very happy. ”

Li Yu and Li Li also attach great importance to reputation, so naturally they will not do such a thing.

"Alright! Whatever you want, this is really not too important, just let the people of the world benefit. ”

Ang Lee doesn't care about this, in fact, if it is a blockade technology and uses saltpeter to make ice, Ang Lee may be able to make a lot of money, but Ang Lee's industry can already provide a very considerable income, and there is no need for the ice-making industry, and ice-making is only possible to make money in the hot season, and because the production process is too simple, the ice cubes made cannot be stored for a long time, it is easy to melt, and it is easy to be learned.

Rather than letting a few people learn it and use ice making to make money from the people, it is better to directly tell all the people about the technology, so that all the people can make it, or after a small number of traders make it in large quantities, they can only sell it at a relatively low price, because there are too many people who know how to do it, and the price will naturally not go up.

In order to let Li Yu and Li Li experience the pleasure of ice cream in the future, Li An found tools, smashed the prepared ice cubes into crumbs, poured honey, milk and other condiments, and then filled three small bowls.

The ice cream taster asked.

Ang Lee picked up a bowl and ate it happily.

"Ice cream? The taste is really good, Li Shilang is really a talent, it's a pity not to be an imperial chef! Ha ha! ”

Li Yu was full of praise for the taste of ice cream, but after just a few bites, he thought of the funny jokes circulating among the ministers.

This paragraph is about Ang Lee, it is a joke caused by Ang Lee's own cooking, although everyone sincerely praises Ang Lee's good cooking skills, but in the era of the Tang Dynasty, praising officials' good cooking skills has a kind of ill-intentioned and teasing meaning, of course, Ang Lee doesn't care, and he is proud.

Of course, there are many high-ranking officials in the Tang Dynasty, and they also have jokes that make people laugh, for example, the right minister Li Linfu is known as the 'Prime Minister of the Deer', and Xiao Jiong, the head of the household, is called the 'Hunting Waiter', etc., all of which have become the talk of boring people after dinner.

Li An felt that even if he was called the 'Imperial Kitchen Waiter', he was much better than the 'Prime Minister of the Roe Tree' and the 'Hunting Waiter'.

After all, being able to cook by yourself is also a craft, which is much better than making a typo!

After eating a small bowl of ice cream, Li Yu and Li Li were all addicted and asked to make more, but they hadn't eaten enough.

"The ice cream is too cold, eating too much is not good for the body, just eating a bowl is enough, you can't eat it anymore."

Ang Lee explained softly.

"Cool? On such a hot day, I was afraid of the cold, and I was about to die of heat. ”

Li Yu and Li Yu couldn't understand.

"The hotter the day, the more you have to prevent the cool air from entering the body, if there is too much cool air, it will consume too much yang energy, and it will make people sick, will I still lie to you, am I so bad, so stingy?"

Li An is really worried about their health, after all, the emperor's descendants are not in good health, once the cold enters the body and becomes sick, even if he has thousands of mouths, he is afraid that he will be powerless.

"Li Shilang, good news! The steam engine test was a success. ”

At this moment, an official in charge of the R&D center ran over and said excitedly.

"It's a miracle that it came out so quickly! Let's go, take me to see it. ”

Li An was extremely excited, directly ignored Li Yu and Li Li, and followed the officials to the R&D center.

Li Yu and Li Yu looked at Li An's back in astonishment, glanced at each other, and strode to follow, anyway, they were idle, so it was better to go and see the excitement.

After entering the R&D center, Ang Lee went straight to the direction of the steam engine R&D department, walking at a trotting speed.

"Li Shilang, you see, the testing machine has been in continuous motion, and it has been running for a while, and not a single component has been damaged."

An officer's excited introduction.

Watching the piston doing reciprocating motions and driving a large group of gears and shafts, Ang Lee's mood was extremely excited, the guy who seemed to him to be difficult was actually made, and it was much earlier than he expected.

In particular, the strength of the parts, the accuracy of the dimensions, and the sealing of the steam engine have been solved by these skilled craftsmen.

There are some technical methods to solve the problem, all of which shocked Ang Lee, a later generation, and felt incredible.

The ancients were very smart, and they also mastered a lot of technologies that later generations did not know, but because the ancient technologies were all family-style, once they encountered disasters such as wars, they were likely to be lost, so that later generations naturally could not imagine what the ancients did.

For example, there are many unsolved mysteries about how the stones of the pyramid were built in the era when there were no cranes, why not even a thin piece of metal could be inserted into the joints, and how the Great Wall was built, which cannot be explained by ordinary common sense.

This can only show that as a later generation, you are too ignorant of some advanced technology in ancient times, so you will always come to the conclusion that without such and such machinery, how can it be possible to move such a huge stone, and how can it be done so accurately without advanced measuring instruments.

A series of questions, all because most of the technologies owned by the ancients have been lost, some because of war, some because of little value, naturally eliminated by the times, in short, the ancient technology we know, only a small part, most of the technology has been lost.

'Haha! Datang finally built a steam engine, if one day he travels back and hears someone say that the technology of the Tang Dynasty can't make a steam engine, he must come up with this evidence and slap him in the face, hum! ’

Ang Lee fell into a fantasy, and it took a long time to come to his senses.

"You have done a very good job, this official will truthfully report to Your Majesty, give you credit, now, the steam engine has been built, the next step, you can develop a steam locomotive and a steam ship, this official is waiting for your good news, in addition, this official will also work with you, research and development with you."

Li An said excitedly.

"Wow......"

All the craftsmen shouted excitedly, after these months of research and development and learning, they have a deeper understanding of the relevant knowledge of steam engines and trains, and naturally understand what it means to the Tang Empire after the successful development of trains, so they are all very enthusiastic and excited.

Li Yu and Li Li also have a little understanding of these knowledge, but because he did not participate in research and development, for this reason, the understanding is not deep enough, watching the piston drive the gear to reciprocate, it seems a little ignorant, after all, the principle is not very clear.

After in-depth research and successful experiments with the steam engine, Ang Lee was in a good mood and was amazed by the craftsmanship of the craftsmen.

After Li Yu and Li Yu left, they immediately told Li Longji about Li An's invention of saltpeter ice, and suggested that it be promoted nationwide to benefit the people of the Tang Dynasty.

Li Longji was very happy after hearing about it, but he really couldn't believe it, after all, the technology of making ice cubes was too simple, so he specially asked Li Yu and Li Li to make the experiment, he wanted to see with his own eyes how saltpeter made ice cubes.

Li Yu and Li Li watched Li An make ice cubes with their own eyes, and understood all the processes and principles, so it was naturally easy to start this experiment, and in a short period of time, in front of Li Longji, the ice cubes were made, and the ice cubes were shaved with tools, and honey and dairy products were poured into ice cream to make ice cream.

After the delicious ice cream was imported, Li Longji was very happy, and immediately ordered the method of ice making to be promoted throughout the country, but the method of making ice cream was not promoted, after all, the material resources of the Tang Dynasty were far inferior to those of later generations, and letting the common people eat these unnutritious things was not conducive to the long-term development of the Tang Empire.

After tasting the ice cream, Ang Lee also arrived at the palace for the credit of all the scientific and technological personnel, and Li Longji was even happier when he heard that the steam engine test had been successful, although he did not know much about the situation of the steam engine.

Rewards and commendations are certainly indispensable, and now that the treasury has more and more money, Li Longji's small treasury is also bulging step by step, and when he has money, he is naturally willing to spend money.

Now the steam engine model has been successfully tested, and the research and development of the steam locomotive is also in full swing, and it is estimated that it will soon be successful.

In this case, various types of carriages will naturally begin to be manufactured, and the technical content of the carriages is more than a little lower than that of steam locomotives, and the difficulty of manufacturing is not to worry about at all.

Although the internal facilities of the carriage to be manufactured by Ang Lee are different, the overall size and specifications are the same, so that it can be easily assembled at any time to change the composition of the carriage.

In addition to the royal carriages carefully built for the emperor, Ang Lee also had to build several standardized conventional carriages, that is, the famous soft sleeper, soft seat, hard seat and other carriages with different needs.

The emperor's needs are the first, although Li An has built a luxurious five-car for the emperor, but this is because the locomotive has not been built, the power is very insufficient, now, the steam locomotive is about to come out, in this case, let the emperor sit in five carriages, it seems too shabby, at least fifteen cars, so that more palace maids, eunuchs, guards and ministers can be accommodated, at the same time, the emperor's activity space can also be larger.

Li An first asked craftsmen to make ten imperial carriages for the emperor's use, and when they were ready, they were ready to merge with the original five carriages to form a luxurious scale of fifteen carriages.

After the manufacture of these ten carriages, the mass production of various types of passenger and freight carriages began.

The freight carriage is too simple, there is no technical content at all, of course, due to the different materials to be transported, the carriage is also slightly different, some materials do not need a roof, just cover it with a tarpaulin, but some carriages need a roof, for comprehensive protection, and some goods are afraid of pressure, requiring enough shelves in the carriage to place these goods.

The passenger carriage is seated, according to the different economic strength, the carriage needs to be divided into grades, the best and most comfortable, of course, the soft sleeper, the hard sleeper is also good, in addition, there are soft seats and hard seats, of course, Li An also plans to build a carriage without seats, so that more manpower can be transported, and the price can also be cheaper, so that some poor people can also afford to sit on the train.

The soft sleeper car is the highest level of carriage, for this reason, this carriage is only equipped with twenty-four positions, belonging to six small private rooms, each entering the passage on both sides, each has bunk beds, can accommodate four people to live together, and the bed is wide enough, there is a small coffee table at the end of the passage, the inside of the coffee table is the medicine jade window, you can clearly see the outside scenery.

Moreover, the lower bunk can also be used as a sofa, and if the four people on the upper and lower bunks on both sides know each other, they can sit on the lower bunk together and chat happily while looking at the scenery outside the window.