Chapter 68 I Don't Know

After listening to Zhang Hao's suggestion, the city lord was silent for a while, and a faint smile appeared on his sad face, like a ray of sunshine shining through the dark clouds, full of hopeful brilliance.

He patted Zhang Hao's shoulder hard, "I suddenly understand why General Wu is optimistic about you. I will immediately pass on your suggestion to General Wu."

Of course, Zhang Hao should be humble: "It's just a little immature suggestion. If you want to really implement it, you need an experienced person like the city lord."

"Haha..." The city lord laughed loudly, but after a while his face became serious again: "Zhang Hao, I have some news to tell you."

"What?" Zhang Hao raised his heart.

"You have become famous. Now everyone knows that you vomited blood after hearing about the princess, and some people even said that you vomited blood and fell into a coma."

Zhang Hao: ...

Zhang Hao's face was dark until he left the City Lord's Mansion. Who the hell is such a gossip? How did such information spread all over the street? No wonder the people along the way looked at me so strangely when I first entered the city.

This shit will not be ashamed in the future, and the streets will be everywhere~~~

Zhang Hao returned to the guild with Zhu Yuantang. Zhu Yuantang will come to negotiate on behalf of the City Lord's Mansion. The results of the preliminary negotiations will be submitted to the emperor's case.

The Zhang family already had mature credit terms, and Zhu Yuantang himself had participated in the discussion, and the new credit terms were quickly drafted. The main thing is to increase the terms of tax collateral.

Before getting a reply from the emperor, it can only be drafted. Then Zhang Hao hurried back to the family. There are still too many things to be busy at home.

The situation is so critical, Zhang Hao must strengthen the Zhang family as soon as possible. To put it bluntly, as long as the Zhang family is strong enough, even if the Qixia country is destroyed, the Zhang family can negotiate terms with the Taihua country or the Canglan country and continue to survive.

Since the country era, Qixia Country has experienced several changes. But there are so few families and sects that have been prosperous for a long time.

For example, the Ouyang family where the prime minister belongs, no matter how the dynasty changes, their support is indispensable in the new country.

This is the power of the family, a power distinct from that of the state.

Even if the emperor hates the Ouyang family, the Nine Yang sect, etc., he still has to greet him with a smile.

In this world of practice, it is said that "the family is the country and the world is the world". There is a family first, and then a country. This order is not wrong.

Zhou Jue hadn't left yet. When Zhang Hao came back, Zhang Shengde was discussing cultivation issues with Zhou Jue. Compared to the knowledgeable Zhou Jue, Zhang Shengde only had to ask for advice.

Zhou Jue himself is the young master of Xinglin Hall and the head disciple of Nine Suns Sect. The words 'family origin' are not enough to describe it. But Zhang Shengde was from Ye Luzi.

Zhou Jue talked and laughed happily, but he didn't hide any secrets. Except for the sect and the core of the family, he knew everything about it.

Zhang Hao came to pay a visit, then hurried back to the smelting base.

Regarding Zhou Jue's thoughts, Zhang Hao had a vague understanding: Talking about cultivation would not lose anything to Zhou Jue, but it could win over the Zhang family.

Just Zhang Hao's status as a registered disciple of Xuanzhen Sect is no small matter. What's more, the Zhang family's black iron smelting ability is enough to put a smile on Zhou Jue's face.

And the best way for the Zhang family to really climb up to Zhou Jue's high branch is to produce high-purity black iron.

In family-to-family communication, interests come first.

When Zhang Hao came to the simple laboratory, he was surprised to find that Huang Mingshan and others were already experimenting with quicklime water.

Seeing Zhang Hao, Huang Mingshan shouted excitedly: "Young master, we found that the volume of the air after burning is reduced by about a quarter after being injected with quicklime water."

In other words, the oxygen content of the air in this world is around 25%?

Zhang Hao read the experiments of Huang Mingshan and others, and the beakers were polished with translucent quartz stone. Glass... not yet, and Zhang Hao doesn't want to produce glass now.

When the Zhang family is truly stable and can fully protect their wealth, it will not be too late to produce glass again. Now it is enough to have quartz etc. for experiments. Anyway, there are special tools for polishing and spells, so it is not troublesome to polish these tools.

Under Zhang Hao's supervision, Huang Mingshan conducted another experiment.

The upper layer of the flask was directly sealed with a small spell, and then a piece of hot charcoal was inserted, and after waiting for a long time, after confirming that the charcoal had not changed, the flask was placed in lime water.

You can see that the lime water rises a little bit, and finally occupies about a quarter of the volume.

And the lime water also became cloudy.

This is a very simple experiment, but it is this simple experiment that can open the door of chemistry.

Zhang Hao didn't speak, but picked up a medium-through quartz tube and blew it into the lime water, and saw that the lime water also started to become cloudy.

"This..." Huang Mingshan and the others were surprised.

Zhang Hao smiled: "I have been thinking, is there a reaction similar to combustion in our body? Well, we will discuss this issue later. What we need to do now is to obtain high-purity black iron.

Let's do an in-depth experiment, what happens when you insert a red hot iron bar into a flask? "

At the beginning of the test, obvious rust appeared on the surface of the iron bar, and the seal on the bottle mouth began to dent.

Until the iron rod no longer changes, place the flask upside down in lime water.

This time the lime water rose to a quarter position in an instant, and the lime water did not become cloudy.

Huang Mingshan was thoughtful: "There is a certain component in the air that can burn with charcoal, and it can also make iron rust. Combustion with charcoal produces a certain amount of gas that can make lime water turbid. After reacting with iron , solid rust is formed, and this part of the gas disappears directly.

And what we breathe seems to need this part of the gas. "

Zhang Hao nodded with a smile.

Huang Mingshan was encouraged, and thoughtfully: "Could it be, this is the aura between heaven and earth?"

"Pfft..." Zhang Hao spat out a mouthful of tea, the turning point was too great.

Huang Mingshan felt a little embarrassed: "Master, isn't it spiritual energy?"

Zhang Hao covered his head, "If this is spiritual energy, then why do we need to add spirit stone powder when we smelt black iron!"

"Oh..." Huang Mingshan also realized his mistake.

Chen Feng next to him suddenly said, "Is it the legendary life force?"

"Life force can make iron rust?!" Zhang Hao rolled his eyes, but he patiently asked everyone to think.

This is the process of breaking out of the cocoon, and this process cannot be spoiled.

Liu Ming next to him jumped up: "I know, it's phlogiston!"

Zhang Hao continued to shake his head: "If this is phlogiston, then what is the gas with a light blue flame that we produced when we calcined the charcoal?"

Huang Mingshan scratched his head, and suddenly asked Zhang Hao: "Master, do you know?"

Zhang Hao laughed, but his words were firm: "I don't know!

But I know that your speculation is wrong, because there are other explanations.

There is only one truth and only one answer.

You guys must find the only answer! "

(The article says that the red-hot iron bars are rusting, not burning. But thanks to the careful readers.)