In the brightly lit hall, under the accompaniment of gorgeous and elegant waltzes, dozens of people in costume danced a cheerful waltz, which was a lively scene.

"Has Edison already lowered the cost of bamboo light bulbs?"

When John entered this hall, he subconsciously began to think about this problem seriously.

As far as he remembers, it must have taken Edison several years to reduce the cost of the light bulb to about twenty cents and then transfer the production rights, but as far as Berlin stands, light bulbs are already a common occurrence in the university's real yàn rooms and in many high-end hotels.

But John quickly shook his head and threw the thoughts away. At this time, Edison should have gradually focused on the promotion of power facilities, and direct current will be his focus for a long time in the future, until Tesla's alternating current completely breaks this illusion!

AC is what makes money!

It's not that John didn't want to show it in advance, but he only understands the principle of alternating current, but he is at a loss for the design of specific equipment. The AC motor is not a bicycle, John had not learned it in his previous life, and he did not have detailed drawings in his head. You know, in 1882, someone in Britain built an AC motor, but it will take at least ten years for AC power to be truly popularized, John does not have the time and energy, and of course does not have the financial resources to do this work, or wait until he returns to the United States to find Tesla to cooperate is the easiest way.

"But in two years, I can consider selling the patent for the battery!"

When he thought of Edison's promotion of direct current, John thought of the battery he had already patented a long time ago. That should be a good thing more than ten years later, when everyone is most competitive, they can sell it at a high price, which is definitely good for promoting their respective power systems......

Seeing John standing in a daze, Luther thought he was savoring this beautiful waltz, and leaned over and explained in a whisper: "This is the Austrian composer Strauss's "Blue Danube Waltz", which I heard also caused a sensation in the United States a few years ago. ”

"Oh, I've heard of it!"

After hearing his friend's explanation, John came back to his senses from his own world and quickly responded with a smile. Of course, he had heard the famous "Blue Danube Waltz", and there were really not many people who did not know about it in later generations.

In order to hide what he was stunned just now, John rolled his eyes and asked quietly: "Luther, it seems that today's dinner is not low...... How did you two get the invitation? ”

Just now, Johan saw the list of people to attend tonight on a piece of golden paper, in addition to Koch, there are also Filschau, Kornheim and other big bulls in the German medical community in this era, it is obvious that tonight's dance is not so simple, it should be a top gathering of the German medical community.

"Hehe, it's just luck!"

Luther grinned and whispered, tilting his head sideways, "Yesterday and today were an important academic meeting of the German Physiological Society, so a dance like this was held in the evening to wrap up...... Peake's mother knew the hostess of the ball, and he knew that you admired Koch, so he asked for these three invitations for you. ”

"Oh, I see."

Hearing Luther say this, John suddenly realized.

Come to think of it, with the current status of the three of them, it is indeed not so easy to participate in a dance party of this level without acquaintances, and it is really lucky. However, John only smiled at Luther's belief that he admired Koch and did not explain too much. For the medical scientists and physicians of this era, he originally had twelve points of respect, and it is not wrong to say that he worshipped.

But......

"Which one is Mr. Koch?"

Looking around, full of well-dressed gentlemen, John couldn't tell which one was Robert Koch. He is also very interested in Philschau, a great star in cytopathology, but it is Koch who he wants to see the most. In later generations, Pasteur and Koch were like the institute that bears their name, and they made a name for themselves in the field of microbiology and pathogenic biology!

"Wait patiently."

Perhaps seeing John's impatience, Luther gently tugged at his sleeve and said with a smile: "Peake has already helped to inquire, and he should soon know which one is Mr. Koch." ”

"Well, thank you."

Hearing Luther say this, John was secretly grateful to his two friends while having a certain amount of gratitude in his heart.

Sure enough, a few minutes later, Peake quietly walked over, stood beside John, nodded at the middle of the hall, and said, "John, do you see that middle-aged gentleman?" He's Mr. Koch! ”

John quickly turned his head to look over.

After Peake confirmed, John finally knew which one was Mr. Koch.

In his forties, he is of medium stature, short and slightly bald, wearing a pair of small-framed glasses and a big beard, a very classic German middle-aged style.

John suddenly became a little excited.

"Hey, what are you going to do?"

Seeing that John had straightened his clothes, and it seemed that he was going to go directly to Mr. Koch, Peake hurriedly grabbed his friend and asked urgently.

"Of course, let's get to know each other!"

Knowing what his friend was worried about, John smiled and comforted him: "Don't worry, I won't do anything rude, I just want to show respect for Mr. Koch's work!" ”

For such a good opportunity, John certainly did not want to miss it.

Unlike other students who came to Germany because of Koch's admiration in this era, John did not think about learning anything from Koch, just as he had gone to meet Liszt in London, and John planned to go and talk to him directly, even for a minute or two.

"Really...... All right. ”

Giving John a suspicious look, Peake hesitated and let go of his right hand.

Under the somewhat worried gazes of Peake and Luther, John quickly walked over to Koch's side. However, there will never be a shortage of people waiting to be met by a person like Koch, John waited for a while, and after the other party finished talking to another elder, he immediately took two steps forward and bowed slightly and asked, "Excuse me, are you Mr. Koch?" ”

"Yes, I am."

Turning to see John, Koch's eyes flashed with curiosity, and he smiled and nodded.

"Hello sir, take the liberty of interrupting!"

Taking a deep breath, John said respectfully: "My name is Johann Huntelaar, I am an international student at the University of Berlin, I have read many of your papers, and I have great admiration for your work!" ”

"Hello. What nationality are you? ”

Koch raised his eyebrows and asked rhetorically, slightly confused.

"American, but I'm German!"

Nodding vigorously, John made a point of emphasis.

Although he knew that Koch was a broad-minded scientist and had trained countless foreign students, but Europe was the center of the world at this time, and many Americans did not like it very much, and even looked down on it, John had already experienced it from the day he arrived in Liverpool. Therefore, during his study in Berlin, he usually emphasized his German identity, which can reduce a lot of trouble. Anyway, except for the blood of the Chinese who really recognizes it in his heart, it doesn't matter to him what this layer of skin is on the outside.

Sure enough, after hearing that John was German, Koch immediately showed a smile on his face, nodded and said, "Young man, I'm glad to see you so studious...... You just said you've read a lot of my papers? What is the main aspect? ”

"I've read anthrax, tuberculosis, including the paper on typhoid fever that you just presented this year."

John sighed for a moment and then said with a smile: "But what I'm most concerned about is that you have a plan about steam sterilization!" Hehe, because I am currently aspiring to become a surgeon and I had visited Mr. Liszt in London before coming to Berlin, I am most interested in this aspect. ”

"Oh?"

Hearing John say this, Koch's eyes suddenly lit up, and the eyes that looked at him suddenly became a little more interested: "Do you also think that sterilization is necessary during surgery?" ”

Although his life's achievements were mainly focused on bacteriology, it is important to remember that Koch was also a physician, and because of his research, he also paid close attention to the study of surgical sterilization.

"Of course!"

John nodded without hesitation.

Under Koch's curious gaze, John continued: "In fact, I have studied not only your papers, but also those of Mr. Semmelweis, Mr. Pasteur and Mr. Liszt, and I think that the biggest enemy of surgery now is the bacterial infection that may exist, so disinfection is not only necessary, but must be done better!" ”

"Semmelweis? Have you studied all his theories? ”

When he heard this, Koch seemed more and more interested, nodded and said, "It's a pity, that's a very good surgeon, it's a pity...... By the way, you just said that you were an international student at the University of Berlin, right? ”

"Yes, sir!"

John was slightly stunned, and quickly nodded and said.

"Very good!"

Koch smiled and said, "I'm going to teach at the University of Berlin at the beginning of next year, so if you're interested, we can sit down and talk about it......

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