It was another whirlwind-whirling experience, and after five minutes, Rosen finally got his feet on the ground.

His brain was shaking like mush, and as soon as he hit the ground, he staggered to the side of the street, leaning against the wall, and it took a while to recover.

Turning his head again, he was standing in the position where he had just been taken away, the only difference was that it was darker, if it weren't for the three more alchemy bottles on his body, he really suspected that the experience just now was a dream.

'Veronica~ Veronica, what a strange woman, powerful beyond high-level vampires, beautiful appearance, arrogant character, but seems to follow some kind of rules, what kind of monster is this? ’

With the town so big, what kind of wooden house would she live in? ’

Rosen turned around and looked around, only to see the dark streets and muddy roads that smelled of human and animal feces, compared to the warm, delicate room just now, it was the difference between hell and heaven.

Forget it, she's gone to such great lengths to hide herself, and she's already made it clear that she doesn't want me to know where she is. She is far more powerful than me, much more terrible than Anne, and I should try to provoke her as little as possible. ’

Rosen didn't think much more, and he hurried back to the courtyard where he lived.

Passing a small restaurant along the way, the aroma of the food made his heart move, and he couldn't help but pat his head: 'Oh, I haven't been back for a day, Mother and Daughter Mary must be hungry.' ’

He immediately walked into the restaurant, looked at the humble menu, and paid for all the most expensive roast chickens on the menu, there were only 2 roast chickens, which were roasted with oily and fragrant aromas, and when he smelled it, Rosen felt that his saliva increased greatly in his mouth.

He had a great appetite now, which was not enough to eat, so he bought another sack of baked eggs with herbs, and then quickened his pace towards the courtyard.

When he arrived at the courtyard, Lawson carefully closed the courtyard door, lit the lantern, fetched a large bucket of water from the courtyard well, and then walked towards the wine cellar with the food.

At night, when the cellar was pitch black and nothing could be seen, Rosen was a little flustered and stood on the mouth and shouted, "Sister Mary? Sister Mary? ”

"Hey~ I'm here." There was a response from inside.

Lawson breathed a sigh of relief, and then carried the lantern and the food into the cellar.

In the dim light of the lantern, Rosen saw Mary and little Alice sitting on the bunk, both of them staring at the exit of the cellar, and when they saw Rosen, little Alice shouted happily, "Brother." ”

Sister Mary was visibly relieved as well.

Rosen felt ashamed, and thought about it, if someone made him stay in the dark cellar all day, relying on others for food and drink, and someone might break in and pull him out and burn him at any moment, then he would definitely panic.

He hurriedly explained: "I'm really sorry, I'm really busy today. ”

Mary smiled and shook her head: "My lord, don't worry about us, there is food and drink here, we are all fine." ”

Rosen became more and more ashamed, he hung the lantern on the wall, and then handed Aunt Mary the roast chicken and the cloth bag with the herbal baked eggs: "Here, you eat first, and I'll go and bring in the water outside." ”

Mary opened the paper bag and saw that the food was so rich, she was immediately very uneasy, and was about to hand it back to Rosen: "My lord, it doesn't need to be so good, let's just eat some of it." ”

Rosen scratched his head: "Take it and eat it." Little Alice is still growing her body. ”

After saying this, he fled to the cellar to fetch the water, and when he brought it back, he saw Mary still sitting there with the papyrus bag, and the food had not moved, and little Alice, though she watched the roast chicken swallow her saliva, did not speak.

Seeing Rosen come back, Mary said to little Alice, "Thank you, brother." ”

Little Alice immediately said, "Thank you, brother." ”

Rosen had mixed feelings in his heart, and he could feel Mary's caution, for fear of upsetting him, he walked over, tore off a leg from the roast chicken, and handed it to little Alice: "Eat, eat to your heart's content." After a while, my brother will start extracting the potion for you. ”

Little Alice was really hungry, but after taking the chicken legs, she still didn't eat them, but turned her head to look at Mary, and only after Mary nodded did she gobble them up.

Rosen put the flint and steel on the edge of the bed, and said, "Sister Mary, the lantern and the flint are here." In the evening, if you can't breathe in the cellar, you can take little Alice for a walk in the yard. ”

"Hey~ Okay." This time Mary did not refuse, and she was very depressed by the fact that she had been in the cellar all day and had no light.

After confessing, Rosen was also hungry, he picked up another roast chicken and began to nibble, nibbling a few bites, eating an herbal baked egg, and then taking a sip of water to moisten his throat, and soon, he was eating.

After a full hiccup, Lawson said goodbye, left the cellar, walked to a corner of the courtyard, and carried the bamboo baskets containing various moldy fruits to his room.

When he arrived at the room and lit the candles, Rosen did not rush to start, but first summarized what he was doing.

He now has four things on his hands: teaching Savi the art of grinding mirrors, creating advanced magic mirrors for the baron, extracting penicillin, and crafting the weapon 'Spiral Troll'.

The first thing has to be taught tomorrow, the time is tight, but the workload is small, it is nothing more than drawing a few pictures and introducing the principle. The second thing is a bit complicated, but there is plenty of time to put it off for the time being. As for creating a spiral troll, he wanted to start immediately, but the materials were insufficient, and he couldn't find one at night, so he could only put it on hold for the time being.

In this way, the most important thing at the moment is to extract penicillin, and as for Sawi's matter, it can be done with some time when refining the potion.

After thinking about it, Rosen immediately set to work.

In the middle of the room, there is a large table two meters long and one meter wide. Lawson took out the glass containers he had prepared during the day, filled them with clean water, and then used the power of alchemy to sterilize the water.

After doing this, Lawson took out another roll of parchment, quill, and ink and set it up, then picked up the moldy fruit, activated the alchemical power, and observed the penicillium in it.

Penicillium is a genus that contains more than 200 different Penicillium species, of which only a dozen or so penicillium secrete penicillin. So, Rosen's first step was to pick out the right Penicillium.

There were more than 30 catties of fruits in the bamboo basket, and there were more than a dozen kinds of fruits, and Rosen observed them one by one, and for each one he observed, he used a quill pen to draw the structural characteristics of Penicillium on parchment, and then classified the fruits infected with the same Penicillium.

Compared to molecular atoms, Penicillium is simply a giant, and with the help of alchemic power, Rosen can see it clearly, which makes his work progress very fast.

For about two and a half hours, Rosen recorded a total of 17 species of Penicillium, each illustrated with the most striking features.

Rosen then proceeded to the second step: determining penicillin.

Rosen didn't know the specific molecular structure of penicillin, so he had to use benzene.

He took out a dagger and scraped each penicillium from the moldy fruit and poured it into the glass of water.

Rosen struggled to recall what he had seen about penicillin, not to mention that he had actually remembered some useful information.

He remembered that different penicillium species secrete penicillin in different ways, and there are generally two ways, one is intercellular fluid and the other is intracellular fluid.

If Penicillium is simply dissolved in water, it can be detected if penicillin is present outside the cell, and if it is intracellular fluid, it will be missed.

In order to avoid mistakes, Lawson activated the alchemy power again, and broke all the cell structures of Penicillium in the clear water into a pulp.

In this way, if one of these penicillium fungi can secrete penicillin, then it will inevitably appear in these clear waters.

But how do you know for sure?

Rosen had already figured out a plan, he took out the wooden box, carefully put 17 glasses filled with penicillium solution into it, and then carried the box to the cellar.

In the cellar, little Alice and Sister Mary were already asleep, but Sister Mary slept very lightly, and when she heard the movement, she immediately woke up, and when she saw that it was Lawson, she was about to speak, but he interrupted her.

'Shh~' Lawson pointed at little Alice and said softly: "Sister Mary, I am looking for a therapeutic drug, and in order to determine the active ingredient, I need to do some experiments on you." ”

"No problem." Mary said without hesitation.

Lawson opened the wooden box, took out the specially prepared sterilized linen, and motioned for Mary to roll up her sleeves.

Mary did as she was told, and when her sleeves were rolled up, she could see that her arms were covered with red pimples, and most of them were ulcerated, and in several places, the ulcers were even connected together, which was shocking.

Rosen took a deep breath, took out a quill, and first found 20 separate abscesses on Mary's arm and marked them separately. Then, he activated the power of alchemy, perceiving the state of the germs in the abscesses, and for each of them, he used a quill pen to draw on parchment and make detailed text descriptions of the germs.

After taking notes, Rosen picked up the sterilized linen, dipped each one in a different penicillium solution, and gently applied it to the abscess. In the end, he also deliberately left 3 abscesses to be used as a control group.

Controlling the variables as much as possible, keeping the control group, and detailed experimental records, Rosen did everything he could, but the conditions were so simple that he could only do it at most.

As she applied the penicillium solution, Mary grunted from time to time, causing her great pain when she was irritating the abscess wound.

"Bear with me, it'll be fine soon." Rosen whispered comfortingly.

After the application was completed, Lawson activated the alchemical power again and carefully observed the survival of the germs in the abscess.

Minutes and seconds passed, and after about half an hour, the results began to show clearly.

Of the 17 abscesses smeared with Penicillium solution, the bacteria in 14 abscesses were basically unchanged, compared with the control group, there was basically no difference, but there were 3, and the number of bacteria was significantly reduced, among which the abscess corresponding to Penicillium solution No. 15 was sharply reduced by 90%!

Rosen's heart was excited: 'Found it! Penicillin is in solution 15, 9, and 7. ’

Originally, to determine whether a drug is truly effective in humans, it was necessary to conduct a 'large-sample randomized double-blind trial', and the whole process took a long time and cost a lot.

But Rosen didn't need to do this, because the efficacy of penicillin has been widely proven on Earth; Second, he didn't have this condition, nor did he have the time to do more verification, he could only do his best to be extremely rigorous under simple conditions.

After finding penicillin, Rosen scooped up a spoonful of water, disinfected it with the power of alchemy, and used it to clean the penicillium solution on Sister Mary's arm.

After washing, Rosen said softly: "Sister Mary, don't worry, I have found a truly effective medicine, and next, I will start preparing the medicine." If nothing else, I'll be able to start treating you soon. ”

Mary's one-eyed light slightly, but soon dimmed again.

"What's wrong?" Rosenci said.

Mary whispered, "Lord Romley used to say that to us before, but ......"

Rosen understood, he accentuated his tone, and said seriously: "Believe me, my medicine is not the same as Romlley's. ”