The flame inside the clay stove had already been extinguished, and the twins had seen the fire when they came back, but unfortunately the charcoal ash had lost even a trace of warmth.

Now, it's time to start the fire again!

"I remember there was a flashlight in the backpack, right?" Zhao Yunxiang asked Han Qianluo, who was carrying the backpack on Han Qianluo's back.

"Well, here it is!" Han Qianluo quickly opened the zipper, and took out the long and round flashlight.

The outer layer of this old-fashioned flashlight is made of bright white iron, and there are two No. 1 batteries, a convex lens, and a dilated aperture inside.

"Oh, yes, the convex lens of the flashlight can be used to make fire!" Lin Qingxuan was still confused just now, how to make fire, now he has the answer.

Because there is no clock, I don't know the current time, but depending on the position of the sun and the degree of hunger, it is about 12 o'clock to 1:30 o'clock.

During the day, the sun is so hot during this time period.

Zhao Yunxiang first took out the charcoal powder, which is very flammable. The charcoal powder is packed in a bottle, which is sealed and will not get wet.

The other bottle contained trivial tinder, which was made of the tissue of coconut shell, was grayish-yellow in color, and contained a large amount of oil inside, which was flammable.

"Fire is very important in survival. Preserving the tinder is the foundation of survival. Of course, it would be the best if you can preserve the flame." Zhao Yunxiang quickly disassembled the old-fashioned flashlight, took off the convex lens, and the focusing circle also fell off. fall.

"This old-fashioned flashlight is so troublesome. Why did the focus circle fall out?" Han Qianluo picked up the focus circle that fell on the beach. This kind of thing is like a mirror, very bright.

"This kind of focusing circle can also be used to make fire, because it can concentrate light. The sun not only has brightness, but also heat. While concentrating light, it can also gather heat." Zhao Yunxiang said.

"I remember watching a documentary. In some places where firewood is scarce, the sun is bright and the ultraviolet rays are particularly strong. People there use smooth metal to make an arc, and the heat collected by the arc can be directly used Boil water."

"I've seen it too. It seems to be a desert area. At that time, I thought that the people there are so smart." Lin Qingyu nodded quickly and said.

Human beings are advanced creatures with high intelligence. Zhao Yunxiang felt more than once that human beings might not have been directly born on the earth.

The origin of primate ancestors cannot be studied. Of course, we don’t need to worry about these, as long as we live in the present, save resources as much as possible, and protect the ecology.

Let's make a fire!

Zhao Yunxiang put the charcoal powder and tinder together on a dry leaf, and then used a magnifying glass to start heating the charcoal powder.

Adjust the convex lens as much as possible, so that there will be a very bright light spot, the smaller the light spot, the higher the temperature.

Zhao Yunxiang played with this kind of thing when he was a child, and it was used to burn ants.

How persistent is Lao Zhao?

I used to use a convex lens to roast ants to death, even until they smoked.

A few minutes later……

The small light spot of the convex lens ignites the charcoal powder, which is carbonized and easily ignited.

"Wow..."

Sparks from the powdered charcoal ignited the tinder, which ignited the dried scraps of palm fronds, until the flames grew larger and burned twigs and logs.

fire!

When the fire came again, seeing this flame flower swaying with thick smoke, the faces of several people once again burst into smiles like aunts.

Only with fire can the next step be carried out!

The piece of boa constrictor meat brought back was huge. Although it was covered with bamboo leaves and leaves as much as possible, it still couldn't hide from the sense of smell of flies.

This kind of fly, which is only the size of a mung bean, is very sensitive.

The sea breeze on the beach has nothing to do with it.

The most embarrassing thing is the visceral fat of sharks!

Because the shark does not have a swim bladder, its liver is incredibly powerful, and the color of the liver was originally yellow like a yellow peach.

But after being dried in the sun and ravaged by flies, it didn't look fresh at all, and the color changed from bright yellow to dark yellow.

And it smells like a stink.

It has only been a few hours since the shark was dissected, and this kind of internal organs are the most prone to spoilage, especially the fatty ones.

This is why the decay of the corpse starts from the inside, because the internal organs of all animals contain a large number of bacteria.

When the organism is alive, the bacteria will keep their own place and achieve the function of balance and protection.

But once the organism dies, these bacteria are like a wild horse, out of control.

"I remember, what do you seem to be doing with the shark's internal organs?" Han Qianluo stared at Zhao Yunxiang, and found that this guy was standing in front of the shark's internal organs in a daze.

"Shark viscera contains a lot of fat, which can be extracted to obtain shark oil. Shark oil has a great healing effect on trauma and burns." Zhao Yunxiang squinted and stared at the distant sea.

"As the saying goes, if you live by the sea, how can you not get your shoes wet?"

"It's a person walking by the river, how can he not get his shoes wet." Han Qianluo corrected.

"But the internal organs of this shark smell weird." Lin Qingyu also stared at the lump of liver that smelled greasy.

"Let's wash it, hang it in the air after washing, and then try to refine the oil." Zhao Yunxiang said, "We don't have cooking oil yet."

"Can shark oil be eaten?" Lin Qingxuan asked with wide eyes in surprise.

"Can't..." Zhao Yunxiang returned softly.

"Then why do you say cooking oil?"

"When I saw the internal organs of sharks, I thought of wild boars. The fat of wild boars can be refined into oil, or it can be solidified."

"This brain circuit!" Han Qianluo smiled, expressing his admiration.

The current job is to smoke shark meat and snake meat. The twins are responsible for washing the brought back snake meat with sea water, and then slicing and smoking.

If measures are not taken quickly, the raw meat will spoil before tomorrow, because the temperature and humidity on the desert island will cause the food to spoil in a short time.

Although the smoked meat tasted hard and tasted not very fresh, it was better than nothing.

"That is to say, we have to refine oil?" Han Qianluo carried the washed shark liver. Even after washing, the liver still smelled very oily.

"Well, oil refining is urgent." Zhao Yunxiang looked at the containers in the shelter, a barrel of cooking oil, a stainless steel basin, and an electric heating pan.

First of all, the electric heating pot is directly ruled out. Bringing this thing back is the fate of being disassembled. Lao Zhao only wants the inner pot of the electric heating pot. The wiring below the pot body is useless. There is no electricity here, only fire! ! !

The stainless steel basin is also excluded. Although this container is a basin, it is used as a pot, and it is a guy who eats!

In the end, the only thing that can be used is a half-length oil drum with a depth of half a meter!

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