"Squeeze the inside of the silk first, and then buckle it on the jar. Remember to seal the mouth tightly when you take it out later."
Zhang Feng reminded them again and again with a serious face. Now it could be said to be the last and most important step. As long as the hydrogen was successfully obtained, it meant that the experiment was successful, and then it could be promoted on a large scale.
"Yes, Master."
Ma Zhou nodded. He also heard the unquestionable tone in his master's voice and did not dare to slack off. "Chujun, come and help."
The two of them each pinched the edge of the silk and began to exert force on each other, trying to squeeze the air out of the silk. Of course, they did not know what air was. They just did what their master told them to do.
"It's done."
Zhang Feng saw that it was almost time and quickly waved his hand to stop them. "Now, put the silk on the jar."
The two of them nodded, gently unfolded the silk and put it on the jar.
"Master, it's done."
Hao Chujun tugged at this corner and said seriously.
"Well, next, put your hands in and gently remove the cardboard. Then, after the time of a cigarette, seal the mouth of the silk."
Zhang Feng stared at the silk and said with a serious face, "Remember to seal it tightly. It's best to tie it with a rope."
The two of them nodded and continued to move their hands. They reached out and slowly removed the cardboard, following Zhang Feng's instructions. After waiting for almost the time of a cigarette, they slowly removed the silk. At this moment, they sped up, grabbed the vent, and tied it with a rope.
"Master, it's done."
Ma Zhou handed the silk in his hand to Zhang Feng.
Zhang Feng took it with a happy face and played with it in his hand. He rubbed it from time to time to feel its softness. However, soon the smile on his face disappeared and was replaced by a touch of worry.
The experiment had been completed, and the hydrogen gas had been collected. But how could they be sure that there was hydrogen gas inside?
It was a colorless, transparent, odorless, tasteless gas that was difficult to dissolve in water. In this era without various facilities, there was no way to identify it.
However, this thing had a big drawback, which was that it was highly flammable and very easy to burn. This was one of the reasons why the use of hydrogen was less.
Flammability?
Then, could he test it with fire?
In any case, there wasn't a lot of hydrogen inside, so there shouldn't be any danger. Moreover, this was the only way now. Otherwise, there really wasn't any way to identify whether this was hydrogen or not.
Thinking of this, he tilted his head slightly and looked at Cheng Chumo beside him with a smile.
"Feng Zi, what are you laughing at? Could it be that he's up to no good again? "
Cheng Chumo crossed his arms like a resentful woman, afraid that others would take advantage of him.
"Shoo, shoo, shoo. With your appearance, do you need to protect yourself so tightly? Why don't you take a piss and look in the mirror? "
Zhang Feng pouted, but the smile remained on his face. "Now, there's a good job. Whoever wants to do it will be rewarded."
"What reward?"
Upon hearing that there was a reward, the three of them scrambled to be the first, as if they were afraid of falling behind.
"How about the benefits of ascension?"
Zhang Feng raised a finger and smiled.
"Just once."
Cheng Chumo frowned and curled his lips. "Then forget it. Who do you think will go?"
Clearly, he was a little traumatized by the experiment just now. Now, he wasn't willing to do anything unless there was something good.
"I'll go."
Du Gou raised his hand high and glanced at everyone. "Isn't it just an experiment? What's so bad about it? "
He wasn't worried that there would be any danger inside. After all, Feng Zi wouldn't harm him.
"Good, Da Bing is a real man. Unlike you guys."
Zhang Feng stepped forward and patted Du Gou's shoulder with a satisfied look on his face.
"Feng Zi, what do you need me to do?"
Du Gou asked curiously.
"Go light this match and place it at the vent of the silk."
Zhang Feng revealed a meaningful smile. After speaking, he took out a match from his waist and handed it to Du Gou.
Du Gou took the match and was a little puzzled. "Feng Zi, are you going to burn this silk?"
"Of course not."
Zhang Feng smiled and didn't explain. "You just need to do as I say."
Du Gou nodded. He didn't understand these things and didn't want to care. It was best to do as he was told. He opened the match and reached for the opening of the silk. Zhang Feng opened the opening. At this moment, a flame suddenly shot out, scaring Du Gou so much that he hurriedly threw away the match and took two steps back.
Seeing this, Zhang Feng quickly tightened the opening of the silk, afraid that a trace of hydrogen would leak out. He then looked at Du Gou and asked with concern, "Da Bing, how are you?"
No matter what, he had sacrificed himself for the experiment. He should be concerned.
However, this guy seemed to be frightened. He pointed at the silk and was speechless.
"Feng Zi, this …"
Du Gou pointed at the silk, his face ugly.
"It's fine. Don't panic."
Zhang Feng casually comforted him with a satisfied look on his face.
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