At this time, Lu Ning asked Zhu Yuanzhang for a decree, saying that he had two subordinates waiting, could he announce the Jinluan Palace? Because there is something to show His Majesty.

When Zhu Yuanzhang heard this, he naturally agreed to announce the person.

There were three servants, one of whom was holding a rectangular iron bar with a tick mark in the middle.

There was also a man holding a boxy iron lump, like a weight and a nose without a weighing hook.

There was another guy who was holding something rather odd, because there was a pointer on it, and it was always clicking.

Zhu Yuanzhang was stunned for a moment, and immediately asked.

"What are these three things for? Zi'an, is this thing useful? ”

Lu Ning picked up the long and narrow iron bar and said.

"This thing is called the Da Ming Rice Original."

"What is the original weapon of Daming rice?"

Lu Ning couldn't help but smile indifferently and said.

"Your Majesty, the meter is a unit of length, our Ming Dynasty's current one foot, about 0.23 meters, from now on, my Ming scale should be meters, and then one thousand meters, about two miles of my Ming Dynasty."

At this time, a minister next to him was not happy, and immediately retorted.

"What the Duke of Fu Guo said is too ridiculous, since I already have the original length unit, why change it?"

Lu Ning was not angry, and immediately replied.

"Because there are some things that can make the Ming Dynasty rich and strong, and the new unit of measurement must be used to make him achieve a better working condition, and the old unit of measurement cannot be used to make those things the best."

This reason is not clear, and Zhu Yuanzhang is also very fond of Lu Ning, and all the ministers are dumb.

"There are decimeters, centimeters, millimeters, silk meters, humimeters, and microns below the meter, which are all units used to produce some precision components."

Zhu Yuanzhang finally understood, it turned out that this rice was used for this.

"So what about the imperial court's collection of taxes?"

"Our current volume is actually the cubic volume of things, we can use cubic meters as a unit, and our ordinary container conversion relationship, one cubic meter is equal to one thousand liters, equivalent to one hundred."

This problem has finally been solved, that is, the non-standard size usually used, and the bow used to measure the acres of land are not used, and all the measurements are solved directly with one meter.

Zhu Yuanzhang picked up the iron lump that looked like a weight again and said.

"What's this thing called?"

Lu Ning explained to him again.

"This thing is called the kilogram prototype, for example, I am Daming, and now one pound is about 0.59 kilograms. In the future, our weight standard will be kilograms, and 1,000 kilograms will be one ton. One thousandth of a kilogram is one gram, which is also to prepare for the future of the Ming Dynasty to enrich the country and strengthen the army. ”

As long as Lu Ning said the words "rich country and strong soldiers", Zhu Yuanzhang was like being beaten with chicken blood, and he was all allowed to play, and the matter of this kilogram prototype was finally decided.

Then, he looked at the ticking thing in circles and asked.

"What is this thing for?"

"Your Majesty, this thing is called the second primordial, and the one that goes fast is called the second hand. Walking a scale is one second, turning a circle is one minute, and turning sixty times is half an hour of my Ming Dynasty, also called an hour. ”

Zhu Yuanzhang suddenly asked: "Why don't you use hours instead of hours?" ”

Lu Ning naturally wouldn't tell him that this was the regulation of Okerid geometry, but only told Zhu Yuanzhang that in the future, if the Ming Dynasty wanted to make more sophisticated instruments, he could only use this more advanced timekeeping method.

When the water leak is filled with water, the flow rate of the water will be faster, and as the water droplets decrease, the flow rate will be slow.

So when you use it for timing, the interval between each scale is actually imprecise.

It is only possible to calculate time accurately with this mechanical timekeeping tool. It is only with precise timing that we can make more sophisticated weapons and instruments.

Zhu Yuanzhang nodded and said.

"These three things of yours are very good, but we only have these three things in the whole Ming Dynasty, can we promote them all? If it can't be promoted, what's the use of having these three kinds of vitality? What's the use of changing weights and measures? ”

Lu Ning thought about it and immediately replied.

"Your Majesty, that weights and measures, as long as there is a template, can be imitated, this kind of mechanical second prototype, it needs to be carefully polished by the construction department, if you give the minister a little time, in fact, it can be made."

Zhu Yuanzhang nodded.

"Then you go to the construction division immediately, and make these things for us as soon as possible, it all depends on your ability, and when the time comes, we will still be rewarded."

"Thank you, Lord Ron!"

So Zhu Yuanzhang immediately ordered: as a punishment for Lu Ning, suspend the distribution of the Fuguo Gong Lu for three months, and during these three months, he needs to take up the position of the construction secretary.

At this time, Lu Ning was assigned to the Construction Division.

Then he took out the kilogram and the rice and asked the people here to imitate some, and then made a ruler out of this length.

Divide this meter into a thousand scales, and then mark the scale of decimeters, centimeters, and millimeters on the ruler.

As for the kilogram prototype, they were also told to find an iron lump of the same mass and beat it out according to the specified length.

As a result, after the opponent's things were punched out, he weighed them on the scale, but found that the iron lumps that the opponent hit were always lighter than his own.

He frowned, and said that the iron impurities you practiced were too many and did not meet the standard.

Then he told them that in order to make iron, the temperature of the furnace must reach more than 1,500 degrees.

These people called the construction division were dumbfounded, and they all asked.

"What is temperature? How much is 1,500 degrees? ”

Since it was a harsh winter, Lu Ning asked someone to fetch a glass of water, and then said to them.

"When there is ice slag in the water, it is zero, and when the water is completely boiled and boiled, it is 100 degrees, and the so-called 1,500 degrees is fifteen times hotter than the water that is completely boiled."

This explanation made everyone dumbfounded, thinking that this lord was a little lacking in heart.