The lime he spoke of was different from the quicklime used in later generations.

This is the earliest application in ancient times, and it is also the most important building cementitious material.

"Thousands of miles of embankment, destroyed by ants, in addition to the pile foundation is stable, compacted, there is the cementitious material lime of the embankment, to withstand years of sun and rain, the river water soaked without leakage or cracking, Lone believes that its quality should be improved." Yuan Ze Dao.

"How to improve the quality, please make it clear to Your Highness?" Ma Feihai looked at the prince with very puzzled eyes.

There are many high-level leaders and outstanding craftsmen in the Ministry of Industry, who rack their brains to improve the quality of lime, but they can't.

Could it be that the crown prince who has lived in the deep palace for a long time can still master the essentials?

Isn't that a fantasy?

Ma Feihai's puzzled eyes, of course Yuan Zhi understood.

Coincidentally, Yuan Zhi was a potter in a limestone kiln in the mountains in his previous life, and he was very familiar with the calcined lime process and process.

In ancient times, lime was calcined in an earthen kiln, and because the temperature of the furnace was not high, the purity of the lime was very low, and his adhesion was small.

In later generations, blast furnace calcination used coal, not wood, and the only problem to be solved was temperature control.

In later generations, there were thermometers, a full set of temperature control valves, and instrumentation, but there were no in ancient times, which required continuous practice and summing up experience.

"Master Ma, this prince once read a lone book, which tells about the 'blast furnace calcination method', and replaces the wood with charcoal, which greatly increases the temperature of the furnace, so that the lime produced is of high purity and strong adhesion."

Ma Feihai was taken aback when he heard this, "Really... Is it really recorded in a single book? ”

"Of course, can Lone still be able to say it out of thin air?"

"No, no... Weichen is stupid and clumsy, lonely and unheard, please forgive the prince, and ask His Royal Highness to make it clear. ”

In ancient times, the dissemination of information was very inefficient, most of the famous paintings and calligraphy were handwritten solitary books, and most of the popular books were transcribed by humans, and the printing industry was not yet developed.

The largest and most complete collection of books in the world, the royal family is definitely one of the best.

Therefore, Yuan Ze said it for this reason, which is not unfounded.

"That's it, Lord Ma, the river embankment needs to be repaired and allocated silver, but we have to solve the fundamental problem first, in addition to making every effort to eradicate corruption in the implementation of the project, put an end to the tofu slag project that cuts corners, and improve the dam building process and standards, so that we can eliminate the hidden dangers once and for all, so as not to collapse every year by repairing and repairing every year, and the limited silver of the household department will be wasted, what do you say?"

Yuan Zhi stared at Ma Feihai with burning eyes and said.

"Yes, Yes, Your Highness is wise." At this time, Ma Feihai was already sweating, except for surprise, he was frightened.

Who said the prince was so foolish?

He also invented the new term 'tofu slag project', which shows that the prince has been paying attention to the Ministry of Industry and infrastructure projects for a long time.

Unexpectedly, the prince was well-read, and he knew such unheard of things in the world.

"But Weichen still has something unknown?"

"But it doesn't hurt to say it."

"It is said that the charcoal is poisonous, and Weichen has witnessed it with his own eyes, which... This uses charcoal to burn the kiln, I'm afraid it didn't... No one dares..."Ma Feihai said tremblingly.

The coal mentioned here is the bituminous coal of later generations, and the heat of the flue gas is high, and it must be more than five or six thousand kcal.

"It's not that the charcoal is poisonous, and the smoke produced by the burning of the charcoal is poisonous, and the blast furnace has a chimney, these are very clear in the lonely book, so let's go back to the Ministry of Industry immediately, gather senior craftsmen for the orphan, and put the first class in the furnace, and see the orphan in the Qinzheng Hall of the East Palace early tomorrow morning, at that time, the orphan will tell it in person, and draw a picture of the blast furnace, and discuss it with you." Yuan Zhi said in a deep voice.

He summed it all up in 'a lone book, and it was very clear'.

Dare to love, his lone book is the 'Book of Heaven', the omnipotence of prophetic foresight.

"Wechen obeys the order, and Wechen retires."

Ma Feihai didn't care about wiping the sweat dripping from his forehead, feeling like an idiot in front of this prince.

Hurry up and slip away, don't let your mother-in-law and mother be ugly, so that the prince will mistake him for an incompetent rice bucket and be dismissed and investigated, then he will become a big wrongdoer.

Looking at the back in the distance, Yuan Zhi called Gao Jin and whispered a few words, of course, asking him to tell Ji Hong to quickly check the details of Ma Feihai.

"Hurry up, let's hurry up, go to the nearby Xianyang County as soon as possible to inspect it, and return to the East Palace early today." Yuan Zhi commanded.

"Yes."

Then the whole tent was busy, shouting, horses' hooves... A mess.

……

When Prince Luan returned to the East Palace, it was getting late.

He hurriedly took a bath, and when he arrived at the side hall of Zhengyang Palace, the palace attendants had already prepared dinner and fruit wine.

The monarch's life was destined to be lonely, and he was different from ordinary people's homes, where the family gathered together and ate at will.

No.

The crown prince is the prince of the dynasty, and his meals are made by special materials, countless safety measures, and dishes have to be strictly tested for poison before they are served.

Being able to dine with the prince is both an honor and a trust.

Without the invitation of the prince, Concubine Lan was in the East Palace, and she was not qualified for this.

After a while, Cao Feilan, who had also finished bathing, walked over from her orchid garden.

With long wet hair draped over her shoulders, she is dressed in a bright red tulle dress, her figure is graceful and graceful, and she is still beautiful and moving, and it also adds a bit of beauty.

"The concubine has seen His Highness." Cao Feilan bowed and bowed.

"It's Lan'er, have you had dinner?" Yuan Zhi took a sip of the wine bottle and said with a smile.

"The concubine body has been used, Your Highness, please use it slowly." Cao Feilan said, a trace of worry on her face.

"Then sit down and drink with Gu at the bottle bar." Yuan Zhi said, put down his wine bottle, picked up the wine jug, and poured wine into an empty wine bottle himself.

"Ouch, let the attendants pour it."

Unexpectedly, the prince poured the wine himself, Cao Feilan was unexpected, and was a little flattered.

The little eunuch standing in the corner of the wall was also frightened when he saw this, and hurried over, "Your Highness, if you need anything, please command." ”

"It's none of your business, go down, something alone calls you." Yuan Zhi waved his hand and asked the little eunuchs and maids in the hall to leave.

"Yes."

They all departed.

"Come to Lan'er, come here."

When the eunuch and maid left, the prince hooked his hand, and Cao Feilan was like a small fish, sneering and snuggling into Yuan Zhi's arms.

A pair of eyes as bright as jewels, looking at Yuan Zhi with a little melancholy, the corners of his lips raised, and he said softly:

"The concubine thinks His Highness will no longer pay attention to me?"

Calculating, there were seven or eight days, and Yuan Zhi ignored her.

The prince was busy all day long, either in the disaster area, or in a private visit to Weifu, and was ambushed, which made people worry.

When she came back late at night, she was also 'cut off' by Luan Feng and Xiaocui's two concubines, taking turns to sleep, Cao Feilan didn't dare to complain at all.

Seeing that the prince came back early today, after she hurriedly bathed, she boldly walked over and took a seat first.

"Look at you, I'm thinking about it again, I'm not ignoring you, I'm busy, I'm coming back in the middle of the night, so I won't bother you, come, drink with Lone."