The hot air balloon caused a sensation, one that lasted for several days. Pen ~ Fun ~ Pavilion www.biquge.info For Xia Hongsheng, the "inventor" of hot air balloons, the warmth brought by Li Li's quality has also lasted for a long time.

Since the hot air balloon already has military value, Xia Hongsheng stayed in Chang'an for a few more days, sorted out all the relevant information on the production of hot air balloons and the use of hot air balloons, and handed them over to the military aircraft workshop to imitate.

The popularity of the Xuandu Temple is unprecedented, and the people who go to burn incense are about to break through the Taoist Temple. Yuan Tiangang walked happily as if he was carrying the wind, and always said that he was the first person to fly to the sky with things, and told the Taoist believers who came to visit about his feelings of drinking tea in the sky, and the magic stick was even more extreme.

If it weren't for the letter from Jingyang, saying that Daoist Zhang's stove had exploded, overturned Danfang, and was injured, Xia Hongsheng would probably have stayed in Chang'an for a few days.

hurried back to Jingyang, and saw Zhang Laodao in the wing room at home, his face was full of small wounds, but as soon as he saw Xia Hongsheng, he immediately jumped up from the bed very excitedly.

"Are you alright?" Xia Hongsheng saw that Zhang Laodao jumped up, and immediately asked.

"It's okay, Poor Dao just has some bruises!" Zhang Laodao was very excited and said to Xia Hongsheng: "Master Hou, Lao Dao has found two things that can change the color of fire at once!" What can turn the fire into purple and blue is the wall frost, and the copper powder that can turn the fire into blue-green, Lao Dao also found that the copper powder is not the same, and the color of the fire burned out is not the same! ”

When Xia Hongsheng heard this, he was immediately overjoyed, and hurriedly asked: "I know the wall frost, but this copper powder, I'm afraid it's not ordinary copper!" ”

Zhang Laodao nodded: "This copper is indeed not the same, Lao Dao also inadvertently calcined, when he was calcining, he got up for a while, and grinded the broken copper furnace to the broken copper furnace before discovering it." ”

"Very good, you take good care of your injuries, Ben Hou here sent someone to rebuild your Dan room immediately, and when you recover from your injuries and make some of these things, Ben Hou will try the effect." Xia Hongsheng said to Zhang Laodao: "By the way, how did the stove blow up?" ”

"This ...... Alas, it's the fault of the old way. Zhang Laodao sighed and said: "Lao Dao felt sorry for the stove that was broken last time, but it was only a little broken, and it didn't leak, so Lao Dao thought that it could also be used, so he used it to calcine the wall cream." I don't know what's wrong, that day Lao Dao was happy because he found what Hou Ye wanted, and the beard was about to celebrate, and asked the translator to go to Jingyang Market to buy meat, Poor Dao refused to eat meat, he ate it by himself, and the stove exploded not long after the clinker. ”

When Xia Hongsheng heard this, he didn't understand why there was a sudden explosion.

It stands to reason that calcining wall frost, that is, saltpeter, will not appear as dangerous things. Even if it is a dry distillation, at most some nitric acid will be distilled.

Nitric acid doesn't explode!

Suddenly, Xia Hongsheng chuckled in his heart, and suddenly thought of what Zhang Laodao accidentally made last time, so he asked again: "Are you using the same furnace that burned green alum last time?" ”

Zhang Laodao nodded: "Yes!" ”

Xia Hongsheng seemed to have a trace of understanding in his heart, but he felt very absurd and incomprehensible.

"Last time, I asked you to use that stove to calcinate the dry distillation of alum, and then collect the alum oil, you made it from that stove, right?" Xia Hongsheng thought for a moment and continued to ask.

"It's Lord Hou's order!" Zhang Laodao nodded: "Where do poor Daoists dare to disobey orders!" ”

Xia Hongsheng scratched his head and thought, that is to say, Zhang Laodao took the furnace that had calcined the alum oil and distilled saltpeter.

It's probably a little bit of alum left in the stove, which makes sense.

"You didn't paint the stove and burn the wall frost?" Xia Hongsheng asked.

Zhang Laodao was stunned: "Inside the Dan furnace...... You can't brush it, right? ”

Xia Hongsheng nodded and said: "I see, that is to say, when you calcined saltpeter, it is very likely that there is also green alum left in the furnace, that is, it is actually equivalent to you putting green alum and saltpeter together for calcination and dry distillation." ”

"Huh?!" Zhang Laodao looked puzzled and asked: "This, in the past, Lao Dao also burned the green alum and then burned the wall frost, and I didn't see the furnace exploded!" ”

"Indeed......" Xia Hongsheng frowned, and he didn't know if he was telling Zhang Laodao, or if he was talking to himself: "After calcining, green alum oil is obtained, that is, sulfuric acid." Nitrate can be obtained after saltpeter calcination and dry distillation. It is equivalent to the fact that the inside of the furnace is actually sulfuric acid mixed with nitric acid...... But that doesn't make up an explosion...... How can a mixture of sulfuric acid and nitric acid explode? ”

Thinking about it, Xia Hongsheng was still puzzled, and finally had to shake his head and say, "Forget it, don't think about it yet, Ben Hou will call someone to repair your Danfang." Zhang Laodao, I think you have to develop a habit of making notes casually. When refining things, write down what was used, how long it was burned, what the heat was, what was the reaction in the middle, what the result was, and so on, and recorded the whole process in detail, so that it would be well documented afterwards. ”

"Don't worry, Master Hou, of course Poor Dao has notes." Zhang Laodao nodded and said.

"Okay, you can recuperate in peace!" Xia Hongsheng appeased Zhang Laodao. The Hu man and the translator were fine, they were far away from the stove, and their reaction was faster than Zhang Laodao, so they were not injured.

Xia Hongsheng also went to visit them, appeased them, and asked the housekeeper to find someone to repair there.

Xia Hongsheng was quite puzzled by the explosion of the stove, and something seemed to vaguely appear in his heart, but it was not clear, so Xia Hongsheng couldn't grasp it, and remembered no.

In this regard, Xia Hongsheng had no choice but to put it aside for the time being, maybe he would remember it one day.

After Zhang Laodao can make a few more things that can trigger the flame reaction, he can start to try to make some fireworks and see the effect. Moreover, you can also take some to the academy and take a lesson on flame reaction?

Speaking of which, it's already April, and in a few months it should be time for the academy to recruit new students.

In this first year, perhaps the academy did not have any big names. If there is, it is only among the current students of the academy, or among those gentlemen.

Come to think of it, they may talk about the academy when they go outside, and they will also bring some students. In addition, the academy does not seem to be known by too many people.

Thinking about it, Xia Hongsheng in the first year was used as a test after all to see the situation. Now, though, it's looking pretty good. In the future, we can consider making the college famous in society and attracting students.

Next, the academy should do a few things that can be in the limelight and famous, so that the world will know the name of Jingyang Academy and know the power of Jingyang Academy. (To be continued.) )