Landlord of the Tang Dynasty

Chapter 297
The one who kicked in the door was naturally Xu Qing!Xu Qing also had fun for a while. He used to be careful to touch the ancient buildings he saw, but now that he sees his own house, he suddenly wants to give it a try. It feels good.It was a pity for old man Ni Bai, who was lying on the bed enjoying the warmth of the quilt, but was suddenly frightened by Xu Qing, almost 50 years younger - he urinated on the bed.

"Hey, my uncle, I scared the little old man to death," the old man Ni Bai hurriedly put on his clothes, and Xu Qing also said slightly apologetically, "Ni Bai, this is serious, it's a big deal, it's a matter of urgency!"

Old man Ni nodded in agreement and said he would get up immediately.Xu Qing knew that there was no reminder, so he stood aside and waited for Old Man Ni.Putting on his clothes, he stepped on his fur boots and led Xu Qing to find a bamboo stick.

There is little bamboo in the north, and the county magistrate's mansion will always have some bamboo, and make things such as summer mats.Opening the warehouse, there were a hundred or so bamboos in front of him, but these were all bowl-sized moso bamboos, so it was useless for Xu Qing to come.Seeing this, Elder Ni fetched another dragon head bamboo, saying that it was used by the old man as a crutch, and that after being boiled in lard, it was very tough and would not dry out.When Xu Qing saw the dragon head bamboo, he thought of the "old antique" family of later generations, and would plant a bamboo of this kind on the head of his ancestor's grave.

Xu Qing subconsciously asked: "How many more bamboos are there, take them here."

But old man Ni Bai shook his head and said: "Master, this dragon-headed bamboo was given by someone else, and there is only one in the house. But those big families around have a lot of old people, so there must be a lot of dragon-headed bamboo."

Xu Qing nodded, picked up the leading bamboo in his hand, and found that it was about the same diameter as he wanted.So he said: "Ni Bai, I used this one first, and you can buy some more. If the master and I succeed, there will be a big reward. Oh, by the way, there is no rush, you can have breakfast first." go,"

The old man Ni said he was going.

Xu Qing took the leading bamboo back to the study, and compared the focal length and diameter he had recorded with this bamboo.

"Alas..." Xu Qing sighed heavily. The bamboo is a bit bigger, and the convex lens cannot be inserted in. If the convex lens is ground a bit, it may damage the overall structure of this piece of glass: "It seems that the only way to do this is to wait for Ni Bailao to wear the headband. Bamboo came back."

The dragon head bamboo was left aside, Xu Qing took out two convex lenses to play with, the convex lens is a magnifying glass, when he was a child, he often held this in front of other people's eyes, saying "bull's eyes", but he didn't know that his own eyes were also in the eyes of others Bull's eye.The magnifying glass is only useful for things that are near, as for the distance, you need two magnifying glasses superimposed on each other.After the superposition, you can only look at things within a certain range. If you want to switch the distance, you need to adjust the focus in addition to changing a telescope.Focusing can change the lens, and can also adjust the distance between the lens and the end of the lens.

Thinking of this, Xu Qing picked up the leading bamboo again, trying to figure out how to make a focusing structure on this bamboo.Suddenly, Xu Qing knocked himself on the head and cursed: "You're so stupid," why?Because what he measured just now happened to be the outer diameter of the dragon head bamboo, and the convex lens inserted has something to do with the outer diameter?

Xu Qing hurriedly thought of a way to measure the inner diameter, but in fact, there is no need to measure it, just put the glass on it and put it on it?It turned out to be a little smaller, but this time Xu Qing was not in a hurry, but laughed.Because if the bamboo is a little smaller, it can hold the convex lens.

Xu Qing patted the table: "Bring the carpenter at home!"

Ordinary carpenters can also do a little bit of bamboo crafting, and it is still possible to do such small things as piercing bamboo.Xu Qing solemnly handed over the leading bamboo to the carpenter, and asked him to unify the bamboo joints inside the leading bamboo.At this time, Xu Qing discovered that the dragon head bamboo has an obvious advantage, that is, its diameter is almost unchanged from the beginning to the end.This is amazing, other bamboos are thick at the bottom and small at the top, if Xu Qing wants to make a telescope, he needs to find a large and a small convex lens, but the dragon head bamboo is just right, with the same thickness at both ends.

The carpenter deserves to be hired by the Xu family as a special carpenter. His hands are as fast as a unicorn's arm, and he is simply a showman. He cleaned up Xu Qing's leading bamboo.Xu Qing measured the focal length according to the previously calculated distance, and asked the carpenter to choose the best section of the dragon head bamboo and saw it off.Slightly longer than necessary to allow for an adjustable distance.

Naturally, the carpenter had no chance to know Xu Qing's purpose for making the leading bamboo, so Xu Qing returned to the study with the empty leading bamboo.Carefully take out the precious convex lens, and then install the two ends in fear, this is not enough, the convex lens is easy to fall out.If this falls out, all of Xu Qing's four or five days of "scientific research results" will be wasted.

Wrap both ends with a small-hole fishing net, only then did Xu Qing dare to take it out and look at it from a distance.

Picking up the telescope, it was nearly three feet long. Xu Qing stood at the window, lifted it up, and looked with one eye, huh...

The telescope is really done!

Although it is a bit blurry, as long as the distance is adjusted, although the grass cannot be seen clearly, the trees in the distance can still be seen clearly. You must know that people with excellent eyesight can only see so far, and it takes a lot of effort. The effect is basically enough, and Xu Qing doesn't expect too much.The purpose of this telescope is only to detect the enemy's situation. Holding the telescope, Xu Qing can see the enemy's generals in the endless field. In the hills, he can see the enemy's situation on the mountain in advance. This telescope can play a big role. The effect is boundless.

Afterwards, Xu Qing will polish more lenses until he knows which one is the most suitable.Of course, the current ones can also be used as future focusing lenses.Therefore, Xu Qing did not fix the two pieces together.I also found a carpenter and made a cover with the remaining dragon head bamboo.

Xu Qing placed two piles of books on the table, made a groove in the middle, put the telescope in the middle, sat up, and carefully adjusted the distance between the two mirrors.Of course, we should also take a look at the Luonan County Bofu in the telescope.

As soon as the camera turned, a small attic in the distance was surrounded by fog.Xu Qing thought, where is the fog coming from at this time?Quickly pointing the camera there, I could see that on the small attic, a door curtain was half hidden, and it was the fog coming out of it.

Taking a closer look, there are two pairs of jade feet stepping on the lotus behind the door curtain. It turns out that the maidservants are taking a bath again!

The door curtain should have been blown up by the wind, and the maidservants inside hadn't found it yet. In addition, it was upstairs, and the place where the servant lived was separated from there by a high wall, so the maidservants were also unscrupulous.Xu Qing didn't know whether the binoculars suddenly became clear, or his own eyes suddenly became stronger. He saw water splashing everywhere inside the door, and the maidservants were actually having a water fight!It's a pity, the door curtain was raised a little... oh no, the door curtain was blown up!

At this time, Xu Qing chose to throw the camera away and stop watching.

why?Look again, back pain!

(End of this chapter)