Bi Fang jumped directly from the rock, walked a hundred meters along the stream, and then returned to the original point.

"No matter what kind of water source you choose, you must observe whether there are animal carcasses and feces around, and whether the water body has a peculiar smell or strange color."

Leonardo held the kettle and looked around vigilantly, for fear of seeing something he shouldn't see...... Something that shouldn't appear.

"The best option is to flow down from a high place, a fast-flowing ...... It's not good if it's too fast, it will drive the sediment at the bottom, and the shallower stream with a lot of rocks at the bottom. ”

"We're lucky, this is the best water source in front of us. Running water does not rot, and it is difficult for bacteria and protozoa to exist in large quantities in such water.

In addition, the water that flows down from the heights through the layers of rocks is itself filtered for the first time, and there are almost no large particles in the surface water of such a creek, and even some colloids in the water are deposited at the bottom. ”

In the midst of rainforests and forests, there will be many such streams.

The abundant rain will fall from the high places and flow down day after day, washing out streams.

"This water is the best." Bi Fang took a few sips of the water in his hand and slammed his mouth, "Okay, it's just that it doesn't smell weird." ”

"Other water sources, such as lake water, are inferior options. The bigger the lake, the better. Small lakes are less mobile, conducive to the reproduction of bacteria and protozoa, and tend to be odorous. ”

【What taste?】 】

[Don't think about it, just want to know what it tastes like.] 】

"What do you ask me about?" Bi Fang dragged his chin and thought for a while, "I think it's the smell of fish." ”

Ahh

Leonardo was stunned for a moment and began to think about what the smell of fish poop was.

"The water in the big rivers and lakes is generally not drinkable, so you have to use clothes, gauze, and tea bags to filter out other impurities and harmful substances after filtering them in advance.

It is best to boil the water for five minutes to kill 100% of microorganisms, including viruses. However, it is troublesome that it cannot completely remove particulate matter in the water, and it cannot remove the odor of the water.

You can also use ultraviolet irradiation to irradiate a portable ultraviolet pen and insert it into the water to irradiate the water body, which can kill all microorganisms at a rate of about 90 seconds per liter. It does not remove large particles of impurities from the water, does not reduce the odor of the water, but does not introduce new odors. ”

Bi Fang explained the various points of the water source, and Leonardo held the kettle and waited for the pills to fully function.

In the hot environment, the two of them rushed for two hours, and they lost a lot of water, and they were extremely thirsty.

After replenishing the water, Bi Fang simply washed his face, and then took out the green snake in the funnel bag for simple treatment and cleaning.

Leonardo shook the kettle in his hand and said vigilantly, "I can drink it, right?" ”

"Drink." Bi Fang smiled, Leonardo was scared out of PTSD by him, and anything that entered the entrance was 100% vigilant.

"Water purification tablets are common things in the wild, the main ingredients are sodium, silver and chloride compounds, this species will react when it encounters water, and the silver ions and chloride ions in it will react accordingly to eliminate the protists in the sewage and some bacteria, fungi, viruses and other debris."

"Some water purification tablets will sink most of the particles and colloids in the water at the same time, and the action time is about 15 minutes, which cannot reduce the odor of water, but the tablets themselves have a slight pungent smell that can cover the odor of water."

"The purified water can even be stored for a long time, but if the water pollution is serious, it is often not enough to purify the water with water purification tablets, but the water quality here is directly drinkable in my opinion."

"But I'm not at ease at all." Leonardo's face was bitter, a little puzzled.

Now he still wants to vomit when he thinks about the scene just now.

Unfortunately, Bi Fang didn't have any container to store water now, so he directly took out the snake's stomach, washed it repeatedly, turned it over, and finally soaked it in water.

Anyone who has seen the animal world should know how well the snake's stomach can accommodate it, and it is definitely one of the best in the animal world.

After soaking for a while, it will be a good water storage container, at least about one and a half liters of water.

After doing all this, Bi Fang began to tinker with red clay again.

"We have to mash all the herbs we have collected directly, and we can grind them into crumbs with two stones, so we don't need to be too particular, we just need its ingredients."

Throw the ground herbs into the red powder and stir thoroughly, Bi Fang picked up the water from the upstream and poured it inside, and began to mix with the mud.

The whole process is very simple, because it is not a dough, but a thin puree.

Soon, a pot of red mud appeared in front of the audience, which looked a little like a red cream, and the whole exuded an oily luster.

Leonardo smelled it closely, and there was a strong botanical fragrance, if he hadn't seen the whole production process, he might have thought it was a new product from a beauty salon!

[I actually feel good? 】

[Is it a delusion?] 】

[I seem to be watching some primitive documentary......]

[How did the old party do it without any sense of disobedience]

[The next Lord of the Rings, the elven prince is not a god, I don't watch. 】

The audience was a little surprised, it felt so weird!

Bi Fang was not polite, he had already been bitten by mosquitoes on his arm, and he scraped a pile directly, rubbed it open with both hands, and smeared it all over his body.

The pot of mud in front of me looked crimson, but once it was applied to the body, it turned bronze!

It was not as unbearable as the audience originally imagined, but it intensified the wildness of the jungle, and the originally fair body directly turned bronze, as if it had been exposed to the sun for a long time.

The moment the red mud touched his body, Bi Fang felt a comfortable feeling of coolness.

After being baked into powder at high temperature, the whole ball of red mud is basically sterile, plus adding water and herbs, it is very cool, and the bag that was originally bitten by poisonous mosquitoes is not itchy.

Leonardo, who was on the side, was not far behind, tied up the cuffs on his hands, pouted and smeared on all the violent torsos, and also became a bronzed "native".

By the time a large pot of mud had been used up, the two had completely changed their "skin color", looked at each other, and laughed in unison.

"Okay, I'm finally done with the mosquito repellent, and it's time for lunch."

Bi Fangpan sat on the ground, dug a soil pit, put the charcoal he had taken earlier into it, and quickly lit a flame according to the re-ignition method, and placed the cleaned bamboo leaves on top of the charcoal fire.

"If you can clean up the poison glands, then it is best to clean them, if not, then it doesn't matter, just roast them completely, they are essentially proteins, and they will be denatured and inactivated at high temperatures."

The snake meat was tumbling over the coals, and so was Leonardo's stomach.

But the only thing that no one noticed was that among the bushes not far away, a touch of white flashed by.

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