Live Wilderness Adventure

Eighth night.

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Bi Fang's profile was illuminated by the flickering bonfire.

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In the pit on the side, there are two skinned squirrels.

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As for meat. . . . . .

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Bi Fang turned over the two grills in front of him, the left and the right. Both were fat and oily. They had to be turned from time to time to avoid dripping oil.

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Animal fat is a good thing, and it should not be wasted at all.

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The squirrel was roasted until it was charred outside and tender inside, but it was still not fully cooked. There was a skewer of insects on the side, and there was the most important step before that.

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Bi Fang forked the bamboo tube beside him, and carefully removed it from the bonfire.

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The bamboo tube was split in half, and it was filled with water. At this time, it was bubbling and boiling. In the middle of the boiling water, a pale yellow crystal stood up as a "hill".

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This is a "salt mountain".

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The newly extracted mineral salt can be eaten, but it is not safe. The first problem is bacteria. Maybe what Bi Fang scraped off was just licked by the white-limbed bison?

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If not the buffalo, what other animal might there be?

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Even if you haven't licked it, it's not safe in the bat cave.

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Furthermore, mineral salts contain not only salt, but also many other impurities. Although there is nothing wrong with eating a little, it will definitely not work if you eat too much.

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So Bi Fang still demonstrated the simplest method that can minimize the risk.

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He first dissolved the mineral salt in pure water, heated it with fire, until the salt solution boiled, and continued to heat it slowly until a large number of white crystals appeared in the container.

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Boiling water, on the one hand, is sterilization and disinfection, on the other hand, it uses the influence of temperature on solubility.

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"The solubility of sodium chloride is very weakly affected by temperature. At room temperature of 20 degrees, the saturated solubility is about 36 grams; when heated to 90 degrees, it is only 39 grams."

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"Typical impurities, such as potassium chloride and magnesium chloride, have particularly obvious changes in solubility as the temperature increases. Taking magnesium chloride as an example, also at a normal temperature of 20 degrees, the saturated solubility is about 55 grams; when heated to 90 degrees, it has been Up to 70 grams."

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Bi Fang used a small spoon to scoop out all the salt. This was the third time he had precipitated the salt.

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Every time he filled it with water, boiled it on a high fire, and steamed it for more than half an hour before a sufficient amount of salt could be precipitated.

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"So when the solubility of sodium chloride in water reaches saturation, magnesium chloride is far from saturated. As the water temperature rises, the difference between the saturated solubility of the two is getting bigger and bigger."

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"Finally, when the water is heated to a certain high temperature, as the water evaporates, when the sodium chloride has crystallized out, the magnesium chloride is still completely dissolved in the water. It is a preliminary purification."

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After stirring, Bi Fang put down the branches and said with a smile, "These are the contents of junior high school chemistry, I think everyone should know it?"

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[Ah, yes, yes, we all know that, dog head]

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【Have you studied, circle in circles】

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[All returned to the teacher]

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[I have a bit of an impression, but I have completely forgotten why I did this]

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[Sure enough, if you learn mathematics, physics and chemistry well, you will not be afraid to travel all over the world. With this skill, Lao Fang might even be able to take the college entrance examination]

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[Am I here to study? Am I here to learn to cook? What did I learn today? Three questions a day, three reflections on my body]

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[Shrimp, and pig heart? 】

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Scrape the salt from the container with a spoon, dissolve it in pure water again, and finally pour it into a container with activated carbon.

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Bi Fang explained: "Because there is no gauze, my charcoal particles are relatively large, so I don't agree to bring them out. Of course, there may be some charcoal ashes, but it doesn't matter, there is no problem with eating charcoal."

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"This filtration is mainly to absorb impurities. At the end of this step, the filtered brine is reheated to precipitate table salt and you can eat it."

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When the salt crystals precipitated out again, the squirrels were almost roasted. This time, Bi Fang was not roasted, but roasted to a dark yellow state.

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Take down the bamboo tube holding the salt water, and under the light of the fire, although it is not very clear, the audience can clearly feel that compared with the original mineral salt, this pile of salt is much whiter, but the particles are very large, which is different from household salt. very large.

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In fact, the modern salt industry is a highly industrialized and standardized process.

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People have a precise understanding of the composition of crude salt, and at the same time, they have developed a modern industry on the basis of complete chemical basic research and industrialization of salt production.

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It is very difficult to "simply" purify the household fine salt that appears in the wilderness.

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The wasted effort and energy is not worth it. Even if Bi Fang knows the process, he will not do it. It is enough to get coarse salt that can be eaten for a long time.

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Bi Fang carefully picked up a pinch of the tip of the hill and sprinkled it evenly on the roasted squirrel. The moment the large salt particles were combined with the hot oil, they immediately melted into the flesh and disappeared.

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A stronger fresh scent came to the nostrils. Bi Fang tore the lemongrass into pieces and gently swiped it on the skin, adding a unique lemon scent to the fresh scent.

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Inciting the smell, Bi Fang took a sharp breath, and then slowly exhaled it after a long time.

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"It's so fragrant!"

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【I'm so hungry】

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[It's nine o'clock, it should be supper time now]

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Gu Wu [woo woo woo, squirrels are so cute, how can they eat squirrels, woo woo woo]

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[So greedy, bah, so greedy]

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[Salt is the first of all flavors, I envy]

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His stomach was already growling, and Bi Fang eagerly picked up the branch, bit down on the bone and meat, and chewed it.

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The rich oil burst in the mouth, accompanied by a salty and umami taste that had not been tasted for a long time, the meat mixed with slender bones was chewed into bone dregs, except for some foreigners, it was delicious enough to be swallowed by the tongue.

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The two squirrels were completely eaten, not even the bones were left behind, and the insect skewers were equally delicious.

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After a long break, Bi Fang bit the branch, briefly brushed his teeth, then took a shower with warm water, and then got into the makeshift hammock to sleep.

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The ninth day of survival in the Banna rainforest.

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Bi Fang got up early, followed the direction signs in the forest, and headed for the camp.

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"If you really get lost in the forest, we can leave some clues to the people who may come to the rescue about where you have been and which direction you are going."

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"A qualified sign must let you see at a glance that it is man-made and contains certain information."

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"There are many ways. If there are stones, you can use them. If you don't have them, you can use wood, grass, leaves, etc. to mark them. destruction by natural factors.”

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Stones, stones, sticks, and tall grass can be used as markers.

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Bi Fang used stones and tall grass at the same time, stacking several fist-sized stones, knotted with tall grass, and pressed them in a certain direction, and determined the distance by the number of knots tied with tall grass.

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One is 50 meters long, if three are tied, it proves that the next sign is 150 meters ahead.

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"It is best not to use stones in the rainforest, because the stones may be washed away when the heavy rain rushes. It is best to use stones larger than the size of a fist to determine the direction by stacking them into different shapes, and determine the distance through trees. It's basically those two elements."

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"In addition, during the day, another effective way to attract people is to burn grass and leaves, and the smoke can be a good indicator of where you are.

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at night. You can use the resources you have to start a large fire. If you have enough fuel, you need to set up three large fires between the piles, making them triangles, and each pile is about 10 meters apart.

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Of course, the premise of doing this is that you must ensure that there will be no forest fires. Once a wildfire occurs, you will almost 100% be buried in it. "

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Bi Fang chatted with the audience, chatting while rushing on the road, and there was no accident in the middle.

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Until noon, the familiar shed finally reappeared in front of everyone.

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"My God, it's finally here."

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Bi Fang put the heavy bark frame on the ground, moved his sore shoulders, and his forehead was covered in hot sweat. After running for a whole morning, he almost collapsed and drank all the water.

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I also threw away all the tools that I could throw, and now I only have a grass skirt, a wooden spear, a stone dagger, red mud powder, some materials, a few bamboo tubes and funnel bags, and finally the bark. The frame, which contained hard-collected iron bacteria, was covered with a bucket hat.

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Even Bi Fang thought it was too heavy and threw it away.

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"I haven't been home for almost four days. Let's not go in yet. The places I chose are all uphill. The rain is not easy to gather. There may be a lot of insects gathered here. Smoke them away first."

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Bi Fang pulled up the small yellow chrysanthemum that was inconspicuous around his waist, tied it with citronella, and lit it on a tinder.

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"This is the pyrethrum I found on the road this morning. People will now deliberately cultivate it and use it to kill insects, because its head inflorescence contains 4 insecticidal ingredients, including pyrethrin A, B and gray chrysanthemum A, B, but they are all easily hydrolyzed and disappear, so don't let it touch the water."

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[Wait, isn't this the chrysanthemum used to make tea? 】

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[This thing can remove insects? 】

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[Damn it, is it okay for people to eat? 】

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[Can't touch water, so can you touch fire?]

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"This is not the chrysanthemum used for making tea, but it looks similar. You don't usually come across it. It is only grown because of industrial pesticides, and it is rarely seen in the wild."

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Bi Fang threw the smoking pyrethrum into the shelter and waited quietly for the smoke to spread.

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"The pharmacological effect of insecticide is to paralyze the nerves of insects, and the effect is still very strong. Generally, insects can be recovered within 24 hours after being paralyzed and intoxicated; after housefly poisoning ~www.readwn.com~ all within 10 minutes Paralysis, the mortality rate is around 60-70%”

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"It is also toxic to arthropods, fish, amphibians and reptiles; but it is not very toxic to birds and mammals. So we don't have to worry too much about what harm it will do to humans."

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The drone approached the ground near the shelter, and the audience could clearly see that there were some inconspicuous little bugs struggling to escape one after another.

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Some ran slowly, and even before they ran out of the smoke range, their movements became sluggish, and they fell to the ground not long after, motionless.

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[Fuck, what a fierce poison! 】

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[Can it kill mosquitoes? It almost killed me for two days]

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【I also want to do it at my house】

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About half an hour later, Bi Fang entered the shelter and trampled the pyrethrum.

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"Without pyrethrum, we can also use pine needles or sage, which have the same effect, but the waiting time is longer, and the effect is better if the environment is sealed. In the home, this method can be used to repel insects, pyrethrum Forget it, no matter what, it’s poisonous.”

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After rummaging inside the shelter that he hadn't come back to for a long time, Bi Fang picked up a few stiff bugs that sucked and threw them out.

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By the way, he swept away all the leaves that had been blown in by the wind, but as soon as a leaf was swept away, a huge paw print attracted everyone's attention.

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