At nine o'clock in the morning, the sunlight outside the window had already filled the room, and Todd was lying on the bed with his eyes open, still replaying the scene of last night in his head.

The contact was only ten seconds, there was no word, no greetings, but the black sheep made him feel like an old friend who had not seen him for a long time.

When the girl returned to the stage to the cheers of the audience, Todd chose to leave, not waiting outside the tent or looking back at the magnificence in the darkness. Maybe this has something to do with his personality in his previous life, when he encounters good and happy things, he always has to leave a room for lightness, and too much contact will only destroy the beauty of the first acquaintance. Don't allow yourself to indulge. It has always been so restrained.

Shaking his head and smiling self-deprecatingly, sentimentality is not a good thing. The monk sat up from his bed, got dressed, took his notepad, gave up the idea of reading in the morning, and walked straight to the underground laboratory below the cemetery.

"Let me see, the materials in the laboratory are basically finished, and the next step should be to make the equipment for biochemical experiments, first of all, what to do is to ......" while rummaging through the notes full of text in his hand, he opened the door of the laboratory with the key on his waist.

A small stone crash came from inside the room, and Todd, who looked up at the sound, looked ahead, and a figure he had never expected appeared in his sight.

Wearing a light white round cake headdress, long black hair combed back to the back of the head, tied into two braids and hanging down the cheeks, the front placket loose top naturally clings to the underdeveloped body, the lightly powdered black sheep sits on the marble test table, two cowhide lacquered boots swing back and forth.

Todd's round eyes widened and he stammered, "You...... How did you...... No...... You're not ......."

Black Sheep looked at the table full of all kinds of equipment and strange vials with interest, picked up a dark vial made of metal glass and sealed with wax, and slowly read the words on the label in jerky Latin.

"Thick ...... Sulfur ......"

"No! don't touch that!"

Hurriedly dropping the object in his hand at the door, Todd rushed to the girl's side, just about to reach out and grab the vial.

With a flick of the girl's finger, a small pebble struck the wall at the other end, and her figure disappeared, instantly appearing where the stone fell.

Knowing that chasing her didn't work at all, Todd opened his hands and said in an almost pleading tone, "Miss Black Sheep, please give me the bottle in your hand." ”

Hearing the title in the other party's mouth, the girl was stunned, then rubbed her fingers against the mouth of the bottle and asked, "What is this?"

Seeing the monk's hesitation and silence, the black sheep smiled mischievously and scraped off the sealing wax layer by layer with his fingers, his eyes blinked, and he was about to twist the cap of the bottle.

"Concentrated sulfuric acid!" Seeing the other party's movements, Todd's mind tightened, and he hurriedly said: "A strong mineral acid with high corrosiveness, it can cause burns to the skin, and the mist formed can cause blindness, in short, it is a very dangerous thing. Now, please give it to me ......"

Got the bottle, and just when Todd thought he could breathe a sigh of relief, he saw the black sheep open the cap of the black powder bottle, and immediately covered his forehead with a headache and sighed heavily.

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An hour later, after confirming that Huggins had led the way and had no ill intentions, Todd taught the girl what to touch and what not to move, and then turned on the kerosene lamp and prepared to start today's experiment.

A pair of dark eyes dangled beside him, watching him weigh powder, mix reagents, dilute gas conduction, heat and filter. Todd shrank his head a little uncomfortably, and said, "Can you please not stare at me like this while I'm doing experiments?"

The girl holding her chin did not have the slightest sense of evasion, but asked him, "Are you an alchemist?"

Thinking about the reasonableness of the title, Todd nodded and then shook his head.

"I don't think so, I've seen those alchemists, they do things that are boring and boring, and you look a lot more interesting here. ”

The monk raised his eyebrows, and secretly said in his heart that it was nature.

The girl began to talk to him one after another.

Todd, who was concentrating on the experiment, slowly let down his guard and unconsciously began to introduce what he was doing to the other party.

"There is so much equipment in this room right now, but in order to actually carry out the experiments I want, I need a lot of cutting-edge equipment and precision instruments. The equipment I'm making right now is a microscope. ”

"Microscope?"

Gradually finding the feeling of teaching students in the laboratory classroom in his previous life, Todd spread his left and right hands apart, expanding to a distance of about 25 centimeters, and said to the black sheep: "Under normal circumstances, at such a distance, the human eye can only distinguish two objects that are 0.1 to 0.2 millimeters apart, which is probably slightly thicker than a hair. In other words, when two objects are less than this distance, the human eye will see them as one object. ”

"Really? I'll try. The girl really plucked out a hair and put it in front of her, trying to tell the difference.

"With a microscope, I can magnify things 100 or even 1,000 times, so I can see a lot of things that I wouldn't otherwise see. ”

When the black sheep heard the other party's words, his eyes lit up, and he happily grabbed the edge of the table with both hands and shouted: "Then what are you waiting for?!

Todd put down his hands and shook his head helplessly: "How can it be so easy, the most troublesome thing in the manufacture of microscopes is the production of lenses." The production of lenses requires the production of optical glass first. ”

The girl was confused again: "I've heard of glass, I heard that it is a treasure secretly created by craftsmen in the south of the continent, but what is a lens?"

Hearing this, the monk apprentice did not know how to answer. The lens involves the principle of optics, which is not a theory that can be explained in one sentence or two sentences; and optical glass is not something that can be made by setting up a pot on the seaside and burning sand in movies and novels; he has also seen the glass made by those southern craftsmen, and the production process is too poor to meet the requirements of optical glass.

While briefly explaining the production process to the girl and watching the glint in her eyes, Todd finally realized why Black Sheep gave him a familiar feeling.

The girl's curiosity about the world and things in his eyes reminded him of himself.

When the sunlight refracted by the cracks in the roof turns golden again.

The black sheep held a translucent crystal in the pot in his hand and pointed it at the sunlight, intoxicated by the colorful light scattered on it, and stretched out his hand to Todd while carefully placing it in the package he was carrying.

"Mr. Todd, it was a pleasant afternoon, and I almost forgot the purpose of my trip. On behalf of the Downtown Circus, I extend an invitation to you and hope you will come back tonight. ”