Panning for gold is a simple yet arduous job. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

According to the different specific gravity of sand and gold, the sand mixed with gold sand is washed in water with a sieve disc to rotate the sand in a circle, and the relatively light river sand will flow with the water, and the dense gold will remain at the bottom, which is often called gold panning.

After washing a large amount of sand, very few gold grains can be obtained.

Or, like iron ore panning, make a whole pure wood equipment with a feeding port and a chute groove, and use the river sand that has been simply screened to be washed and screened by a chute type.

This is very simple, the key is the question of gold content.

Judging from the river sand brought back by the team members, the gold sand here is probably more scary, and this may be the reason why humans came to pan for gold for the first time.

Zhang Guoan carefully inquired about the situation, and after confirming that what they said was true, he said:

"In this way, I will first teach you how to pan for gold, and then you will organize your hands to do it; Bring some daily necessities, and then ask Deputy Captain Guo Beyu to come back with half of the staff, mainly to guard a river estuary!

I'll send some more team members later, and I'll be building a castle battery right away! ”

Zhang Guoan casually found a dustpan and demonstrated it on the river beach.

This is very simple, everyone can understand it at a glance.

Then they obeyed the order and set off with a lot of supplies.

Zhang Guoan returned to his wooden house, and after planning again, he didn't find any problems, and decided to go back to operate it immediately, and strengthen the supply here!

He took his fleet and a large amount of sulphur along the coast of Liuqiu, and after more than two days, sailed back to the Badaohe area.

The Gu Jianshan team members actually came here and said proudly: "Master Zhang's house." I instructed their craftsmen to burn good mule-style cement on the first fire, and it rained without delay------"

"Well done!" Zhang Guoan said happily, "You have basically mastered this technique, and you can also let others learn it." It's really good. ”

Zhang Guoan patted him on the shoulder and admired.

Gu Jianshan smiled, his eyebrows and eyes couldn't be distinguished.

Zhang Guoan asked for a moment and said, "Have you gone to look for marl?" ”

Gu Jianshan immediately said: "I have found it, but I haven't found a bigger mine yet, but the previous one is like a mountain, and it won't be used up in a few years." ”

Marls are widely distributed, and the general marine marls often contain the remains of fossils and microfossils generated in situ, proving that they were deposited in quiet basins. Or the mouth of a large river.

The lake phase is a product of a quiet and shallow water environment.

Widely distributed, does not mean that it is everywhere, and it can definitely be found.

This day happened to be a rest day once in ten days, and Zhang Guoan walked around.

There was a heavy rain here two days ago, which was too good for agricultural production and saved a lot of manpower.

Zhang Guoan looked at the nearly 10,000 acres of lush green rice fields, and felt very relieved, as long as this season passed. He is even more afraid of nothing------ like the potatoes and sweet potatoes, which can only play a supporting role. What can really solve the problem is high-quality grain seeds.

Zhang Guoan ignored the joyous crowd, who were gambling again with arquebuses, bows and arrows, and keju competitions.

Men, women, and children got on their horses and shouted.

This is their happiness, but Zhang Guoan feels that it is really boring, and they really can't change their habit of gambling.

He returned home. Quiet was not there, so he went directly to the breeding and seedling breeding base.

There was only one person there, on a large bamboo mat, flipping corn seeds.

She was so heartbroken for these corn seeds.

During the growth period, she should be strictly and in stages to remove impurities and inferiority.

I also want the mother to go to the male. The male panicle of the female parent has just emerged the parietal leaf and has not yet been pollinated in time, and all the male panicles of the female parent in the seed production area should be uprooted without leakage, and the artificial assisted pollination work should be strengthened.

In the corn pollination period, it is generally necessary to start pollination at 8-10 o'clock in the morning, when the dew is dry and the pollen is the most, and it is necessary to teach while picking, or vibrate the male plant to pollinate, which should be carried out 4 to 5 times to improve the seed setting rate, which is very annoying work.

Be careful with the final threshing and drying.

Zhang Guoan looked at her wearing a big bamboo hat, holding a big bamboo hat alone, carefully turning it over.

As long as the seed production is successful this time, they can proudly say that they have really brought another high-yield grain to the Great Song Dynasty.

There is no shortage of land in the Great Song Dynasty, and there are only less than 100 million people in the entire south of the Yangtze River and Sichuan------ think about it, even now, in the Tianmu Mountain area of Lin'an County, there can still be tiger infested incidents.

Zhang Guoan insisted that the Great Song Dynasty only lacked effective force, while Quiet was inclined to believe that the Great Song lacked high-yield grains.

The little couple quickly unified their thoughts, and they lacked something to make up.

Zhang Guoan also picked up a big bamboo fence, stepped forward and took off his shoes, and began to turn them over.

This is the time when the sun is at its fullest, it is necessary to turn it frequently, to be even, every seed is precious.

Quietly said, "Is a river safe there?" ”

"It was very safe, and there were not a few deaths."

"The doctor here told me that after you left, more than thirty more ----- have died."

"Quiet, you see, this shows that the Artemisia annua we brought is still useful------ we have tried our best to kill mosquitoes, there is no problem with those twenty and a half children, this is still related to personal physique."

Quietly sighed, hundreds of people died before and after, this is for this place!

Zhang Guoan listened to her sigh and said: "We should be proud, the mortality rate of developing this piece of land is less than 20 percent, and the mood of the other soldiers is not very stable?" The people of this plane also believe in destiny, and they are very willing to pay us on time. ”

Thinking about it quietly, he was a little more relaxed, and said: "It's good to wait for the cinchona tree to become mature, quinine side effects are big, but it can always fight malaria." ”

Zhang Guoan later helped her pack all the corn seeds into bags.

If there is a large breeding and seedling breeding base, only two people are busy, there is no way, legal holidays.

Subsequently, Zhang Guoan went to the Badaohe Shipyard again.

There was only Director Zhang Laoshi alone, it was empty, and everyone else went to play.

Zhang Guoan looked at the dock project and felt that the earthwork would be completed in another month.

Director Zhang Laoshi said happily: "I have never instructed so many people to work, and the excavation speed is very fast------

"There is a lot of power in numbers, and besides, you can't be distracted by working here------"

"Hehe, this big island is really a good place, the camphor trees are all large areas of forests, but not far into the mountains to see a lot, and there are also patches of acacia trees and pine trees."

Zhang Guoan nodded and said: "If you go down the Badao River and go to the mountains, there is also a kind of tree called spruce, which is born to make wood for the masts of sea ships, which is more than ten zhang high, and there is no one in the entire Great Song Dynasty, and it can only be found in the mountains of Liuqiu Island." ”

Zhang Laoshi was happy and said: "Very good, there are camphor wood, acacia wood, pine wood, only this mast is missing, as long as you find it, everything will be fine!" ”

"Don't worry, Lao Zhang, I will do my best to help you."

After Zhang Guoan finished speaking, he left the happy Zhang Laoshi factory director and went to the salt field to have a look.

He knew that the factory director of Zhang's hometown always felt embarrassed by his high salary. (To be continued.) )