The railway from Liverpool to Manchester was the first railway in the strict sense of the word.

The so-called "railways in the strict sense", that is, railways without horse-drawn carriages, and the railways that were earlier than it were often mixed with steam and horses, and the style of painting was strange.

The horse-drawn carriage railroad of the late Qing Dynasty is often seen as a farce, in fact, it is a repetition of what the British have done.

People obviously prefer those without horses to those with horses.

So more than a decade ago, the Liverpool-Manchester railway was born, and it successfully sparked a follow-up, and countries around the world began to build railways.

The railroad in the United States had not yet been paved to the west, and the Apache who followed the horse whistle to ride the train were all seeing the railroad for the first time, and naturally observed every detail of the train with curiosity.

The horse whistle was also watching.

But unlike the others, he was looking at the train with an archaeological-like mentality.

The locomotive had a striking chimney, which didn't surprise him, but there was something remarkable about the carriage in the train.

The driver of the train, for example, looked exactly like the driver of the carriage, and sat almost in the open behind the chimney, as if the boiler in front of him was the horse he was going to spur.

The carriage was also similar to that of a horse-drawn carriage, wooden, with a canopy, and windows on all sides, which were very simple.

Despite this, there is still a lot of enthusiasm for taking trains, and almost every train is full of passengers, especially those who are boarding a train for the first time.

"It was this railway that set off a railway craze all over the world, and now almost all countries want to have their own railways like the UK." Mayo said.

The horse whistle asked, "When was it built?" ”

"It seems to be around 1830." "Once it's done, it's an amazing investment, and as far as I know, people who hold a stake in it get 10 percent a year......

Before boarding the train, the horse whistle noticed a detail - the spiral coupler.

At this time, the train was still connecting the carriages with a spiral coupler, which was an unreliable device, that is, two carriages were hooked and then tightened with iron chains, which was inefficient and unsafe.

After about twenty years, the more advanced Jenss substitution will gradually replace the auger coupler, and it will remain in use for hundreds of years.

Ma Whistle felt that he should have invented the Jen coupler in advance.

By the standards of his previous life, the experience of riding this kind of train was terrible, the road was bumpy, the carriages were crowded, crowded with people, and there were stations and seats.

Fortunately, Liverpool and Manchester are not far apart, only a few tens of kilometers.

Two hours later, they arrived in Manchester and headed to a neighbouring neighbourhood.

Salford, New Bailey Street.

The faint smell of beer lingers in the streets, and the people who live here are accustomed to it.

Because it's home to a brewery, the flavors it produces have become a part of people's lives.

At this moment, in a villa near the brewery, the young brewery owner is writing something in his study.

To William Thomson...... I did some reflection on last year's experiment to measure the temperature difference of the waterfall, and I have to say that it was a misconceived idea......" was written on the paper.

Just then, a woman walked into his room and said with some dissatisfaction, "You're writing to Thomson again?" ”

"yes, what's wrong?" The brewery owner stroked his chin and scribbled the letter.

"How can you do this! I am your wife, and you correspond to others every day! The woman said again.

The brewery owner frowned: "Thomson is a man......"

"Isn't it worse!" The woman didn't give up, "It's this man who ruined last year's honeymoon, and you made me lose a full honeymoon in order to measure the temperature difference of some waterfall with him!" And your measurements still come out of nowhere! ”

"Well, well, I'm sorry......"

There was a moment of silence in the room.

The wife calmed down for a moment, and then said, "A guest is coming." ”

"Who?" The brewery owner asked.

"William—"

The brewery owner blurted out, "Thomson is here?" ”

The wife took a deep breath: "No, it's William Mayo, your classmate. ”

"Mayo?" The brewery owner thought for a moment, and then got up a little reluctantly, "I don't know him well, why did he suddenly want to come to see me, I hope he didn't come to borrow money......"

As a wealthy capitalist, he would meet old friends who came to borrow money from time to time.

It wasn't long before he met his old classmate William Mayo.

"Long time no see, Joule." Mayo greeted first, then turned to say, "Great Chief, this is my classmate, James Joule. ”

Great Chief?

Joule couldn't help but wonder as he looked carefully at the person beside Mayo, an unusually burly young man in a suit...... Yellow race.

It is quite unusual to see yellow people here, and the title of "big chief" makes him a little confused.

"Is he?" Joule asked.

Ma Whistle took the initiative to introduce himself: "Hello, I am Ma Whistle, the Great Chief of the Apache people of North America. If you find the name a mouthful, you can also call me 'Albert' – Isaac Albert is my English name. ”

As he spoke, he secretly looked at Joule in front of him.

At this time, James Joule looked twenty-eight or nineteen years old, very young, not the familiar old man in the textbook, although he also had a lot of beard.

Not even that well-known unit of energy.

In 1848, James Joule was just a wealthy brewery owner and a well-known citizen scientist.

If a few years earlier, his position in the scientific community could be described as Yamanomura.

Hearing Ma Whistle's self-introduction, Joule's doubts did not diminish because of this, but he still shook his hand politely first: "Hello." ”

Mayo explained: "Joule, as you may know, I went to the United States the year before last. The Great Chief of the Whistle is a friend I made in the United States. ”

"You're welcome." Joule nodded and said politely, almost with a perfunctory look written on his face.

He never expected that this old classmate, who he hadn't seen for a long time, would bring a North American savage over when he met, what did this mean?

But Ma Whistle's next words made him stunned.

"Mr. Joule, I have read almost all of your papers, on the theory of electric current heat generation, thermal work equivalent, thermal dynamics...... and so on."

"In particular, the experiment you designed to measure the thermal work equivalent is very ingenious. I even bet that this will become a must-have in future secondary school textbooks. ”

"I fully agree with some of your most important points, such as that heat should be the embodiment of movement, not the so-called 'heat mass'. ”