The county magistrate who guarded the gate still looked at Wang and Li with a smile.

Said a meaningful word.

"I was still here on an errand yesterday, but today, hey, that's not necessarily the case."

"Two adults, you have a sentence that is right, the little one has been guarding the door here for four or five years, which one is the master or recognizes."

"So, of course, it should be, which one is not the master, and the little one naturally recognizes it."

Isn't it the master?

These words surprised Wang and Li.

What does this mean?

Why do these words sound so creepy.

Seeing that the faces of the two officials changed, the guards only felt dark in their hearts.

A little pawn like him, where has he ever seen the performance of adults who have always been high.

The official spoke in a mocking tone, and explained to the two old officials:

"The two adults are naturally here, and the notice at the door is so conspicuous, why don't you stop for a moment and take a look by the way?"

When Wang and Li heard this, they moved to the notice.

When I looked up, I was amazed!

I saw that the notice actually read:

Xiang Yanxuan, the minister of the East Palace.

Capital sins can be avoided, but living sins cannot be escaped.

The crimes committed by some officials of the department are really heinous and heinous.

Originally, it was a sin that could not be forgiven, but the Holy One was merciful and authorized the officials to take money to buy their lives.

The past can be washed away with the silver of sin, but the future that has been filthy cannot be washed away!

The court has completely lost trust in some people, believing that they are all unrepentant villains!

Without a trace of compassion for the people, and without any sense of the people's livelihood and suffering, he is no longer suitable to serve as the father and mother of the people.

The following officials are hereby dismissed from official positions, and all punished officials are not allowed to engage in politics for the next three generations!

The list of dismissed officials is ......

As soon as Wang and Li looked at the two officials, their names were on the announcement.

The two of them only felt like a bolt from the blue.

I was dumbfounded.

……

"Lord Shangshu of the Ministry of Works, this is the second letter to the Ministry of Works, and it is about some thoughts on the wooden keel waterwheel."

The ancients said, "Irrigation is beneficial." "Agriculture is the foundation of the survival of the Chinese nation, and water is the main factor restricting the development of agriculture.

In plains with a dense network of rivers, irrigation of crops does not need to be too time-consuming and laborious, but how to divert water to irrigate fields on slopes or places far from water sources has become an urgent problem to be solved.

In the long-term agricultural production of spring planting and summer cultivation, autumn harvest and winter storage, the industrious and intelligent ancient working people relied on their own labor practice to invent early agricultural tools for drawing water.

The appearance of orange trees and rollers in the Western Zhou Dynasty satisfied the basic demand for water resources for farmland irrigation.

In order to further meet the demand for agricultural water, on the basis of my predecessors, I initially had the idea of a more efficient water-lifting and irrigation machinery - overturning, that is, keel waterwheel.

In people's hearts, the dragon king is the lord of the rivers and seas, and it can make wind and rain and bless the wind and rain.

Therefore, this kind of water lifting facility is designed to resemble a keel, so it is called "keel waterwheel".

The keel waterwheel is developed from the bucket to lift water, so the keel waterwheel is also called "bucket".

At the end of the letter, I will enclose a rough drawing of the design.

After getting the design drawing, the craftsmen of the engineering department can change it according to the actual situation to facilitate the production of usable physical objects.

Let me first briefly introduce the structure of the wooden keel waterwheel: "...... The body is made of slots, which can be two feet long and wide from four inches to seven inches, and about one foot high. …… People rely on the frame, step on the crutch wood, then the keel board with the rotation of the roadway board, scrape the water ashore. ”

The body of the keel waterwheel is a long wooden plank groove, two zhang long, wide or narrow, and the large gear and pinion (sprocket) are placed respectively.

Erect a pavement board in the trough, the length is one foot shorter than each end of the trough board (33cm today), for installing large and small wooden wheels, the pavement board is connected by the scraper section by section with wooden tips, like the skeleton of a dragon, the large axle at the upper end of the manpower drive the scraper, and the water is scraped to the upper end of the wooden trough and flows into the field continuously.

The working principle of the wooden keel waterwheel is: "overturn, set up a locomotive to divert water; Thirsty black, for the curved tube, with air to lead the water also. ”

The principle of lifting water of wooden keel waterwheel is mainly to realize the transmission of movement by chain drive, which is essentially equivalent to scraper conveyor. It enables continuous liquid transfer.

As far as the transmission mechanism is concerned, the meshing of its chain (keel) and sprocket (big wheel, small wheel) is not through the chain hole, but through the groove on the chain link (keel joint) and the cooperation of the gear teeth.

This meshing method does not reduce the strength of the chain link, simplifies the structure and manufacturing method, and is suitable for the characteristics of wooden parts.

The following estimates of its water lifting capacity should be preliminarily as follows:

“…… About one person can irrigate five acres of land, and cattle are twice as much...... A few feet of car, one person and two hands fast, the work of the day, can be irrigated two acres. ”

"The keel system, irrigation paddy field 20 acres a day, with the strength of four or three people, the drought year is doubled, the highland is doubled, and the horse and ox are twice the work and the cost is doubled. The stream flows for a long time and uses water, and the Daze is flat and uses the wind, which does not require manpower to rotate. ”

It will have twice the result with half the effort for farmland irrigation, and will certainly reduce the burden of farming for the working people.

There are generally two ways to use wooden keel waterwheels. One is "treading water"; The second is the "water pulling type."

"Treading water" is mainly used in the Gangnam area.

In the Jiangnan area, two straight logs are planted on the car dam, and then a log is used to fix the upper end of the two straight logs.

The waterwheel is fixed on the dam, and the height of the frame should be moderate with the water of the person and vehicle. The car and water man plucked on the crossbar and pedaled left and right on the pedal board of the car rolling head shaft, so that the eight pages of the water wheel were stuck in the keel page and rotated down continuously, and the water page plate on the keel lifted the water upward, and the car water man was very effortless, that is, it was called "treading water".

But this kind of traffic is fixed and cannot be moved. The body is slightly longer than the one in the zone and has a higher head.

The wooden keel waterwheel designed and used for the southwest region, although it is a manpower to lift water, because of its short body, only 3m long, can be easily moved, but the head is low, only about 1m.

Such as waterwheel rib gear (from the tail pile count), in the water-lifting river pond only flooded on the first body rib gear, waterwheel slope is steep, the amount of water lifted is small, very difficult.

For example, when the horizontal surface of the river pond is flooded with three or four ribs of the waterwheel, the slope of the waterwheel is flat, and the amount of water lifted is large, and it is not very difficult.

The wooden keel waterwheel used in the area pulls water to irrigate the fields, which is a heavy manual labor.

When working, men should carry the whole piece of water on their shoulders to the far away ditch to irrigate the fields, which is different from the Jiangnan area by hand and without stepping on it, which is called "pulling water."

It is pulled by a pair of bamboo sticks called "showa" on the crutches of the large roller shaft, and the keel pages in the carriage carry the water from the river pond to the field.