The progress of mankind and the development of science and technology have both accidental and inevitable causes.

For example, Newton, who was suddenly hit by an apple falling from a tree one day, discovered the law of gravitation, and I have to say that it was an accident.

Of course, there is also inevitability in this accident, many people in the world have been hit by all kinds of falling things, why did Newton discover the law of gravitation, because he knows how to think, and he also has a scientific theoretical basis, if he wants to be an ordinary person, even if the apples on the tree fall and hit him, there will be no law of gravitation.

However, aside from accidental and inevitable factors, there is another important reason that affects the development of science and technology, and that is human needs.

For example, the invention and use of the telegraph and the telephone is because with the opening of the Age of Discovery, people began to run around the world, so that there is a higher demand for the transmission of information.

At this time, Yang Cong encountered a demand, and it was a very urgent need, that is, how to increase the output of sleepers.

You know, he boasted that he wanted to repair the railway between Shuntianfu and Chengtianfu within two years, more than 2,000 miles of railway, just the rails need 50,000 or 60,000, and the sleepers need hundreds of thousands, on average, at least 100 rails and nearly 2,000 sleepers must be produced a day, and if you add the time of transportation and installation, this output will have to be doubled.

That is to say, the production of hundreds of rails a day, barely improvised, may delay a little progress, however, within two years to repair the railway from Shuntianfu to Chengtianfu is not much of a problem, this sleeper will not work, a day to produce more than 1,000 sleepers, two years may not be able to produce more than 2,000 miles of railway sleepers needed, let alone follow-up transportation and installation.

What to do?

On this day, Yang Cong personally came to the newly built sleeper workshop, staring at a pair of saw-saw carpenter father and son, and it was an hour at first sight.

He stared at people like this, which really made them nervous, and even, at this hour, the father and son didn't dare to rest, so they kept tugging and seesawing all the time.

As a result, after pulling the saw for an hour in a row, the old father was physically exhausted, his hand was accidentally deviated, and with a snap, the saw blade was broken!

At this moment, the father and son were really frightened, in front of Lord Yang, a god-like existence, they actually pulled the saw blade off, how could they get it?

Yang Cong didn't brush his sleeves away or get angry as the father and son imagined, not only did he not get angry, but walked up and said cordially: "What's the matter, old man, are you tired?" ”

The old man said with a little trepidation: "Yes, Lord Yang, the little old man is really old, and if he doesn't use it, pulling a saw will make his hands and feet weak, which makes you laugh." ”

Yang Cong still smiled and said: "People are not machines, they will naturally be tired when they work, not to mention the hard work of seesawing, it doesn't matter, it doesn't matter, if you are tired, go and rest quickly, and I will go around again." ”

After that, he just smiled and floated away with Wang Xuan and the others.

In fact, at this time, he was also quite anxious, it would definitely not work like this, if the output of sleepers could not be raised, it would be a joke to repair the railway to Chengtianfu within two years.

What to do?

Yang Cong took the group silently to the School of Physics not far away, thinking about it as he walked, and after thinking for a while, the School of Physics had arrived, and he asked helplessly: "Sir, can ordinary strong men pull a saw?" ”

When Wang Xuan heard this, he couldn't help but be stunned, he thought carefully for a while, and then shook his head and sighed: "I'm afraid it won't work, don't look at this sawing seems to be individual work, in fact, it also requires skilled skills, they are sawing along the ink line drawn in advance, if it is slightly off, this wood will be wasted, ordinary people pull saws, there must be strength, but to control the saw blade, I am afraid it is difficult to see down the ink line." ”

When Yang Cong heard this, he continued to ask: "Are there still carpenters around the capital?" ”

Wang Xuan shook his head again and sighed: "Don't say it's around the capital, in the entire Beizhili, we have recruited all the carpenters who can be recruited." A few hundred people is already a lot, you know, in order to serve the labor, the most craftsmen gather around the capital, and the general province can't recruit so many carpenters. ”

This crazy recruitment doesn't seem to work, so how to increase the production of sleepers?

Yang Cong's mind began to recall what he had seen and heard in his previous life, and scenes flew by, and suddenly, he remembered something.

This thing, how to say it, if you have to give it a name, then call it a sawing machine.

In fact, this sawing machine is not a bed with a complex structure, that is, a large circular saw blade rotates rapidly in the middle, and then, the wooden square is pushed over from the platform above, in general, it is a large circular saw blade and a set of devices to promote its rapid rotation.

This thing is not difficult to make, because the device that pushes the object to rotate rapidly has long been available, and the set on the drilling machine can be used when it is moved, and what is missing is a large circular saw blade.

Thinking of this, Yang Cong immediately gestured and said: "Sir, immediately order someone to make a saw blade, which should be round, just like a piece of pancake, about a foot in diameter, and just open a few fixed holes in the middle." ”

This thing is really nothing to the current School of Physics, they can make thick gears, not to mention a thin saw blade, Wang Xuan confessed, and in less than an hour, a fresh circular saw blade appeared in front of everyone.

At this time, Yang Cong had already ordered someone to dismantle the transmission device of a lathe, and prepared a large square table about one zhang long and half a zhang wide.

Yang Cong directly ordered Wang Xuan's disciples to install the saw blade on the transmission device of the drilling machine, and then opened a jump gap in the middle of the large square table, so that the saw blade stretched out of the table for a small half, and this simple sawing machine was completed.

The next thing is the test, in the shocked eyes of everyone, Yang Cong personally opened the valve, let the saw blade rotate quickly, and then, he picked up a wooden board with his own hands and pushed it along the table to the rapidly rotating saw blade.

The direction seemed a little difficult to control, the planks were sawn in two, but the line in the middle was slanted.

Yang Cong thought about it, and ordered someone to stare at the wooden square next to the saw blade, and then picked up a wooden board with his own hands, and slowly pushed it over the rapidly rotating saw blade along the tabletop next to the wooden square.

This time, the sawn planks were straight on both sides, just like those sawn out by a skilled old carpenter!

Seeing this, everyone looked at Yang Cong with reverence.

This Lord Yang is really a god, he can come up with such a thing to use in an hour, and in the future, the output of this sleeper will not have to worry, because the speed of sawing wood is more than ten times faster than that of a skilled carpenter!

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