Live Wilderness Adventure

Chapter 488 Uninvited Guest

Night of the eighth day.

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

In the soil pit on the side, there are two skinned squirrel hairs.

As for the meat.

Bi Fang turned over the two grills in front of him, one on the left and one on the right. Both of them were very fat, and they were sizzling with oil. They had to be turned over from time to time to prevent the oil from dripping.

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

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

Bi Fang picked up the bamboo tube on the side and carefully removed it from the campfire.

The bamboo tube was split in half, and it was filled with water, which was boiling right now, and in the middle of the boiling water, pale yellow crystals stood up to form a "hill".

This is a "salt mountain".

The freshly extracted mineral salt can be eaten, but it is not safe. First of all, there is a problem of bacteria. Maybe the scraped off by Bi Fang happened to be licked by the bison just now?

If not the bison, perhaps some other animal?

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

Furthermore, the ingredients in mineral salt are not only salt, but also many other impurities. Although there is nothing wrong with eating a little, it is definitely not good to eat too much.

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

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

Boiling water, on the one hand, is to sterilize, and on the other hand, it is to use the influence of temperature on solubility.

"The solubility of sodium chloride changes slightly due to the influence of temperature. At a normal temperature of 20 degrees, the saturated solubility is about 36 grams; when heated to 90 degrees, it is only 39 grams."

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

Bi Fang scooped out all the salt grains with a small spoon. This was the third time he had precipitated salt.

Every time he fills up the water, boils it over high heat, and steams it for more than half an hour to precipitate a sufficient amount of salt.

"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 becomes larger and larger."

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

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

【Ah, yes, yes, you know everything, dog head】

[Have you learned it, go around in circles]

【All returned to the teacher】

[I have a little impression, but I have completely forgotten why I did this.]

[Sure enough, if you learn mathematics, physics and chemistry well, you won’t be afraid to travel all over the world. With Lao Fang’s skills, you might even be able to take the college entrance examination]

[Am I here to study? Am I here to learn how to cook? What did I learn today? Ask three times a day, reflect on myself three times]

[Shrimp, do you want pig heart? 】

Scrape the salt from the container with a spoon, dissolve it in pure water again, and finally pour it into a container containing activated carbon. The upper and lower parts of the activated carbon are netted with clean large leaves, and a few small holes are pierced on it.

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 dust, but it doesn't matter. It's no problem to eat some charcoal."

"This filtration is mainly to absorb impurities. After this step is over, the filtered brine is heated again to precipitate table salt and can be eaten."

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

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

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

People have a precise understanding of the composition of coarse salt, and a modern industry developed on the basis of complete chemical basic research and industrialization of salt production.

It is very difficult to "simplely" purify the present household fine salt in the wilderness.

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

Bi Fang carefully picked up a pinch of hilltops and sprinkled them evenly on the roasted squirrel. The moment the large grains of salt combined with the hot oil, they immediately melted into the flesh and disappeared.

A more intense fresh fragrance hits the nostrils. Bi Fang tore the lemongrass into pieces and gently waved it on the skin, adding a unique lemon fragrance to the fresh fragrance.

Instigating the smell, Bi Fang took a deep breath and let it out slowly after savoring the smell for a long time.

"It's so fragrant!"

【I am so hungry】

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

[Wooooow, squirrels are so cute, how can you eat squirrels, woooooooo]

【So greedy, bah, so greedy】

[Salt is the first of all flavors, envy]

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

The rich fat exploded in the mouth, accompanied by the salty taste that I hadn't tasted for a long time, the meat mixed with slender bones was chewed into bone residue, except that the meat was a bit foreigner, it was so delicious that even the tongue could swallow it.

The two squirrels were completely eaten, leaving no bone scum, and the insect skewers were also crispy and delicious.

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

The ninth day of survival in the Banna rainforest.

Bi Fang got up early, followed the direction signs in the forest, and rushed towards the campsite.

"If you do get lost in the forest, we can leave some clues to people who might come to the rescue that you have been to this place and which direction you are going."

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

"There are many ways here. If there are stones, you can use stones, if not, you can use wood or grass, leaves, etc. for marking. And it is best to use more than two methods together, which can increase the fault tolerance rate and avoid animals or animals. destroyed by natural factors."

Rocks, pebbles, sticks, and tall grass can all be used as markers.

Bi Fang uses stones and tall grass at the same time, stacking several fist-sized stones and knotting tall grass, pressing them in a certain direction, and determining the distance by the number of knotted tall grass.

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

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

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

at night. You can use the resources you have to start a large fire. If the fuel is sufficient, you need to build three large fires at intervals, making them triangular, and each pile is about 10 meters apart.

Of course, the premise of doing this is that you must ensure that you will not cause a forest fire. Once a wildfire occurs, you will almost 100% be buried in it. "

Bi Fang babbled with the audience, chatting while driving along the road, and nothing unexpected happened on the way.

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

"My God, it's finally here."

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

I also threw away all the tools that could be thrown away. Now I am covered with only a grass skirt, a wooden spear, a stone dagger, red clay powder, some materials, plus a few bamboo tubes and funnel bags, and finally the bark The box, which contains hard-collected iron bacteria, is covered with a bamboo hat.

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

"I haven't been home for almost four days. Let's not go in. The places I chose are all uphill, and the rainwater is not easy to gather. There may be many insects gathered here, so let's smoke them away first."

Bi Fang pulled up the inconspicuous yellow chrysanthemums around his waist, tied them with lemon grass and lit them on a kindling.

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

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

[This thing can kill insects? 】

[Damn it, is it okay to eat it? 】

【You can’t touch water, so can you touch fire】

"This is not the Chrysanthemum chrysanthemum used for making tea. It's just that it looks similar. You don't usually come across it. It's only planted with industrial pesticides, and it's rare in the wild."

Bi Fang threw the pyrethrum that ignited and smoked into the shelter, and waited quietly for the smoke to spread.

"The pharmacological effect of insecticide is to paralyze the nerves of insects, and the effect is still very strong. Generally, insects can recover within 24 hours after being paralyzed and drunk; after being poisoned, houseflies are completely paralyzed within 10 minutes, and the death rate is 60. -70% or so"

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

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

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

[Fuck, it's so poisonous! 】

[Can it kill mosquitoes? These two days have almost killed me]

【I also want to do it at my house】

About half a quarter of an hour later, Bi Fang entered the shelter and stomped out the pyrethrum.

"Without pyrethrum, we can also use pine needles, or sage, both have the same effect, but the waiting time will be longer, and the effect will be better if the environment is sealed. If you are at home, you can use this method to repel insects. Pyrethrum Forget it, no matter what, it’s toxic.”

Flipping through the shelter that hadn't come back for a long time, Bi Fang picked up a few stiff bugs that had been sucked up, and threw them out.

By the way, all the leaves blown in by the wind were swept away, but just as a leaf was swept away, a huge paw print attracted everyone's attention.

Dolphins are the only animals other than humans that do not mate for reproduction