Karin's arrival left Todd a little overwhelmed.

First, he really didn't know how to arrange the girl's shelter and food, and second, he also vaguely felt that the other party's runaway from home might have something to do with yesterday's conversation, and he should bear some responsibility.

The girl didn't pay much attention to his thoughts, and after walking around the monastery, she planned to use a mass room next to the underground hall as a temporary residence.

After Todd saw it, he immediately objected. Leaving aside the question of whether it was appropriate for a young girl to live under the tomb, the darkness and dampness of the room alone gave him enough reason to find another place for her.

Afterwards, the apprentice monk planned to let Karin live in the village at the foot of the mountain, so that the distance was not far and inconspicuous. However, the other party's request to live near the laboratory made him extremely troubled.

Eventually, Todd came up with a helpless solution.

He managed to find several sets of monk's robes and had Karin disguise herself as a monk so that she could move freely. Then he planned to secretly vacate a room in the monastery library, which was used to store scriptures, as a dormitory for girls. Ignoring Huggins' hilarious appearance when he learned of the idea, Todd, with the help of several people, finally helped her move in the middle of the night.

In the days that followed, the monk's underground experiments were no longer done alone, and he was accompanied by a female assistant who was pleasing to the eye but mischievous.

Whether it is a previous life or a present life, Todd also feels that the teaching interaction between teachers and students is so difficult, so that a person who lives thousands of years behind is undoubtedly an arduous and long journey to understand cross-era technology.

"You're saying that our world is made up of tiny particles?"

"Karin, I use the word molecule. ”

"Okay, points...... Son, what a strange word. ”

Todd fiddled with the flask in his hand and said without looking back, "In addition to molecules, there are also atoms." Molecules can make up matter, atoms can make up molecules, or they can directly make up matter. ”

The girl scooped up the powder from the jar with a measuring spoon and asked, "Then when we have a microscope, will we be able to see the molecules and atoms?"

Todd laughed: "No, no, we make an optical microscope, and if you want to see molecules and atoms, you have to use an electron microscope. ”

"So why don't we just make an electron microscope?"

"Uh...... No...... It's not a matter of not wanting to make, but ...... We can't make it, and we have to solve the problem of electricity ...... first. Alas, Karin, forget what I said about molecules and atoms, perhaps we should look a little closer. After I built this microscope, I can first let you see small animals that are invisible to the naked eye, such as cells or whipworms. ”

The girl was visibly dissatisfied with this perfunctory statement, and her mouth pursed, and she slammed the powder in the bowl with a grinding rod in annoyance.

Seeing her performance, Todd could only sigh heavily.

After 11 busy days, I tried hundreds of raw material purification, material proportioning, mixed firing, and decontamination and floating impurities, and experienced countless failures. Todd finally confirmed the best process for making optical glass.

The first step is the most basic glass raw material ratio, adding soda ash, limestone, quartz and other materials according to the proportion.

In the second step, boron oxide is added to increase heat resistance and chemical stability, so that the melting temperature of the glass is reduced, and it can resist sodium vapor corrosion.

In the third step, a small amount of silver chloride is added to increase the optical sensitivity of the boride glass.

In the fourth step, a very small amount of copper oxide is added as a sensitizer to mediate the optical reaction rate of the glass.

The fifth step is to melt, and the prepared raw materials are heated at high temperature to form a uniform bubble-free glass liquid.

The sixth step is forming, where the glass solution is poured into a pre-prepared mold and waits for it to solidify into shape.

The seventh step is annealing, which slowly cools the glass to room temperature after gradually solidifying.

The last and most difficult step is the one.

Ground lenses. The surface of the lens is carefully polished with natural corundum to ensure the light gathering ability and imaging accuracy of the lens. Due to the lack of professional optometry instruments and light sensing equipment, Todd could only use the most primitive direct light measurement method to polish the lens by hand. Due to the lack of proficiency and matching, it took him five days to polish a barely working product.

The eyepiece is only 5x and 10x, and the objective lens is only 10x and 40x, and this number is still measured manually, and there is still a huge error.

Because it was too late to make a mirror, the condenser had to be replaced with copper.

There is no lathe (in fact, because he doesn't understand mechanics) can't make mechanical knobs, so he uses the card slot to adjust the height.

The observation deck is a simple wooden shelf.

When Todd made this extremely simple and outrageous microscope himself, the first thought was not to cheer, but to smash and redo it. It took a lot of effort for him to suppress this impulse in his heart.

Karin was not the least dissatisfied with the machine, which had taken great pains to make, but when she placed her hair on the observation table, the girl immediately felt that it was the greatest invention in the world.

Todd built a microscope, naturally, not simply to observe hair.

After taking a sample of blood from his hand and a sample of his leg from Edgar, and adjusting the magnification to 400x, he was finally able to see the true source of their xenogeneous abilities - bacteria. Originally, he also planned to try to discuss with Karin to extract her body fluids for testing, but the disgusted expression of the other party when he heard the word sampling made him immediately dismiss this idea.

Place Huggins and Edgar's samples in a glass slide and adjust the eyepiece, objective, and sight distance. Due to the limitation of the magnification effect, the bacteria under the microscope are only the size of a needle tip, and the specific morphology and structure cannot be observed at all, so it is impossible to perform intracellular examination and dissimilation testing of bacteria.

Giving up studying the bacteria in the two of them for a moment, Todd turned his attention to himself, the Sutherland Relic.

After testing his blood to show no abnormality, Todd finally found two very different bacteria in his lacrimal gland secretions and in his dental nerves.

The bacteria in the lacrimal glands, which are more active, more stable in division, faster in iteration, and more numerous, are mainly found in the retina and lens, which he deduces may be the source of the clairvoyant ability.

The globular bacteria in the nerves are very strange, they are very few in number, and only a few can be seen occasionally under the microscope. From the perspective of resistance, it is resistant to high temperature and cold, and even if it is exposed to acid for a long time, it will not damage the cell wall structure. In addition to being unable to regenerate and divide, this bacterial body is almost the spokesperson of invincible bacteria.

There should be no mistake, the globular bacteria in the nervous system are the true face of Sutherland's relics.

But a new problem has arisen.

1. The bacteria in the eyeball give themselves the ability of "perspective", so what is the function of Sutherland bacteria?

2. If the Sutherland bacteria were infected in the cellar by themselves, then when did the "see-through" bacteria in the eyeballs enter the body?

Unexpectedly, these two mysteries were completely solved in the following experimental accident.