There was no word all night, and the sky in the distance was already white.

Early in the morning, Lin Feng's door was knocked on by several slightly heavy knocks.

Lin Feng sat up in a daze and opened the door.

Standing in front of him were the three brothers who had gone out yesterday to look for ore.

Lin Feng, who hadn't woken up yet, woke up all of a sudden.

"Wang Hua, have you found what I ordered you?" Lin Feng

Asked

"Master, I found it, it's in the granary in the backyard." Wang Hua replied

"Master, what are you doing with all this sand?" Wang Fu, who was standing next to Wang Hua, asked.

"This sand is..."Lin Feng just wanted to answer, just when he saw Wang Rong walking in the distance.

Yesterday I told him to get an earthen stove and a blast box, and today it should have been done.

Thinking of this, Lin Feng hurriedly asked, "Wang Rong, are the earthen stove and blast box ready?" "

"It's ready, sir, I've put the earthen stove and the box next to the farmland." Wang Rong nodded.

Lin Feng nodded, then turned to Wang Hua and said, "Okay, Wang Hua, the three of you will move all the stones in the granary to the field, and Wang Rong and I will go to the earthen furnace to wait for you." "

"Yes, sir." Wang Hua said respectfully, turned around and left with Wang Fu and Wang Gui after speaking.

"Wang Rong, let's go too." Lin Feng shouted and followed Wang Rong to the small flat land next to the farmland.

There is a half-man-sized earthen stove on the flat ground, and next to the stove are blower boxes, iron rods, and pottery bowls

While Wang Hua and the others were still moving sand, Lin Feng picked up the blast box and studied it.

Lin Feng took a closer look, and felt that the blower equipment of this era was still relatively primitive and simple, and the entire blower box was composed of a leather bag and a blowpipe, but it was only made into a box for sale.

However, this kind of thing, the older it is, the more practical it is.

"Wang Rong, let's light the fire first." Lin Feng pointed to the firewood pile on the side and said.

"It's sir!" After listening to Lin Feng's order, Wang Rong immediately stacked the firewood neatly in the earthen furnace, and then took out a fire fold from his sleeve and lit it.

Seeing this fire fold, Lin Feng immediately became interested.

The fire fold is a kind of lighting tool for the ancients, similar to the modern lighter, the principle is to wrap the spark with a rough roll of clay paper, and when it is needed, the paper roll can be opened to ignite the combustible.

Lin Feng couldn't help but sigh at the wisdom of the ancients.

It didn't take long for Wang Rong to light the firewood, and then Lin Feng instructed Wang Rong to raise the fire to the highest level.

"Master, is it okay now?" Wang Rong also has a bit of a blacksmith foundation, holding a blower box to pump constantly, and the temperature of the flame has been rising.

Lin Feng looked at the flames burning in the earthen furnace, the color of the flames at this time was still orange-red, and the temperature was about 1000 °C.

If you want to make glass, you need a high temperature of at least 1600°C, and the flame color is white or orange.

"Not enough, go on." Lin Feng shook his head.

After speaking, he said to Wang Rong: "Continue to add firewood and fire. "

Wang Rong didn't dare to slack off and continued to add fire.

At this time, Wang Hua and others, who were carrying materials from the granary, also came to the earthen stove, and the three of them carried five large and small cloth bags, which were bulging and seemed to be filled with a lot of sand.

"Sir, the sand and stones you commanded." Wang Hua stepped forward and handed one of the cloth bags to Lin Feng.

"Well, yes, let's leave it at that." Lin Feng took the cloth bag and looked at it roughly.

This bag of sand and stones is about twenty pounds in size, and it varies in size.

After that, Lin Feng looked at the earthen stove again, this Wang Rong blew for a long time, and the temperature was still maintained at about 1000 °C, Lin Feng sighed secretly, Wang Rong, you are really single-minded.

"Wang Hua, you can operate it, and raise the temperature again." Lin Feng said.

"Okay, sir!" Wang Hua responded.

Replaced by a more skilled Wang Hua to control, I saw that Wang Hua kept throwing firewood in his hands, the air boom box in his mouth kept operating, and the flame temperature was rising.

"Wang Hua, when the flame color reaches white, it will be almost there." Lin Feng reminded on the side.

On the side, the three brothers of the Wang family watched their eldest brother Wang Hua work with relish, so that they could learn some skills.

In ancient times, there was no entertainment or pastime, so learning technology in ancient times was essentially a form of entertainment and pastime.

Almost a pillar of incense time.

"Master, the temperature is almost there." Wang Hua wiped the sweat from his face and said to Lin Feng.

Lin Feng glanced at the earthen stove, and the furnace was burning with a blazing white fire.

"Well, yes, I'll operate next, Wang Hua, you will be my deputy." Lin Feng nodded and picked up the iron pipe on the ground.

"Yes, sir." Wang Hua nodded in agreement.

"Next, look at my operation, remember them all, and learn carefully!" Lin Feng said solemnly.

"Yes, sir!" The four of them said in unison, and several people understood that the master was for everyone's good, after all, they had sold their property to save a few people before, so several people were extremely positive.

"Wang Hua, seventy percent of the sand, thirty percent of the limestone crush, stir it." Lin Feng said.

"Master, it's done." Wang Hua put the ingredients in a pottery bowl prepared in advance and handed it to Lin Feng.

Lin Feng took the pottery bowl and carefully put the porcelain bowl into the earthen furnace with two iron pipes.

As the flame continued to burn, decomposing and firing, the sand in the bowl gradually melted and turned into a liquid-like object.

The liquid at this time is also known as liquid glass.

"Sir, the sand is melting!" As a blacksmith, Wang Hua instantly exclaimed.

"Don't worry, I'll be more surprised later." Lin Feng snickered.

I saw Lin Feng stretch the iron pipe into the earthen furnace, and one end of the iron pipe was carefully dipped in a little glass liquid.

Lin Feng's lips were close to the nozzle at the other end, and he blew slowly.

A small, round object began to appear.

Then Lin Feng soaked the end dipped in liquid glass in the field water on the side.

Poof!

"Alright, look." Lin Feng withdrew the iron pipe in his hand

A crystal clear glass bead is firmly fixed to one end of the iron pipe.

The whole glass bead has an emerald green color, like jadeite.

"Wow, that's beautiful! Is this Ruri? "

Wang Hua stared at the glass beads with wide eyes and said in surprise.

The other three were also dumbfounded as they looked at the crystal clear glass bead.

"It's glass." Lin Feng said.

"Sir, can you let me try it?" Wang Hua was a little eager to try.

"Yes. Lin Feng pulled out the glass beads at the top of the iron pipe and handed the iron pipe to Wang Hua.

"Thank you, sir!" Wang Hua excitedly inserted the iron pipe into the earthen oven.

Soon, Wang Hua also made the molten glass into a ball.

"Master, this is too amazing, unheard of!" Wang Hua exclaimed.

Seeing Wang Hua's success, the brothers rushed to get started and wanted to try.

Although Wang Hua is uneducated, he also knows that his master may be going to make a fortune.

Lin Feng smiled and nodded.

"But sir, why is that, why does the sand and limestone turn into glass when they are combined? Is it witchcraft? Or is it immortal? Wang Hua asked.

Lin Feng smiled slightly and said, "Wang Hua, this is called science. ”

Lin Feng picked up a glass bead he had made, lifted it, and looked at the sky through the glass.

And this small glass bead, under the refraction of the sun, burst out with unprecedented light.