The use of herbs dates back tens of thousands of years ago. Cave dwellers live in caves all year round, because the caves are wet, which leads to frequent joint pain.

Maybe it was because I was eating and sleeping all day to make my baby, so a certain caveman used a torch to ignite the mugwort and then burned the painful joints.

Cave dwellers discovered that mugwort has miraculous effects on treating joint pain, and this is the first time that humans have used herbs to relieve pain.

On the earth, almost all plants have certain medicinal properties, from the precious Ganoderma lucidum Polygonum multiflorum to the plantain and dogtail grass on the roadside.

Herbs were studied by ancient Chinese people, and the Compendium of Materia Medica is the main record of herbs.

"Cooking medicine?" Han Xuening stroked the black hair in her ear and stared at Shui Lingling's big eyes curiously. There was no such thing as cooking in their tribe.

Among the Alpha tribes, there are mainly no suitable vessels to cook, and they form the fire of hope for most civilizations, and they have not always had them.

When cooking medicine, you need a pot, fire, water, and herbs. Zhao Yunxiang doesn’t have a pot, but he has shells!

There are many huge shells piled up by the sea. These shells died in the sea for various reasons, and then were washed up on the beach by the waves.

The shells are hard texture and after grinding, they are calcium carbonate, also known as lime. Some of the lime we use now are mined.

These mined limes are like coal. They are formed by the death of some organisms in the Devonian ocean and are covered by soil after the death of them, such as ammonites and right-angle stones.

Build a few stoves with stones, put the shells on the fire and preheat them, and then come to the forest.

The mud pit that Simba worked hard to dig with his claws was filled with mud and water. The water looked turbid, but there were basically no bacteria.

After all, it is covered with soil and isolates the air, and bacteria are difficult to breed, but it smells like a fishy smell mixed with soil.

Han Xuening has always been following Zhao Yunxiang. In her opinion, those who can release the sky fire with bare hands must be powerful. As Alpha's people, they must follow the gods.

The mud pit was dug a little shallow. After mixing the soil, it was filled with some mud, which was not drinkable. Zhao Yunxiang continued to dig with wooden stubble. As he dug, the mud and water in the pit gradually diluted.

After digging more than ten centimeters, the water from the bottom of the pit slowly penetrated out. Most of the groundwater was formed by rainwater penetration on the ground. Generally, water can be dug down in low-lying places.

"These water is so turbid." Han Xuening looked at the water in the mud pit. Usually the rain water they drink is well-connected, otherwise the water accumulation is obviously cleaner than mud water.

"I'm ready!" Zhao Yunxiang carried a few pieces of charred charcoal, as well as some fine sand and stones.

The turbid water cannot be drunk, and it will take some time to wait for it to automatically clarify. However, it has the things to purify water, stones, fine sand, and charcoal. These are all advantageous tools to purify water sources, among which charcoal has the strongest adsorption ability.

As we all know, charcoal can purify air, water sources, and deodorize. It is best to use this to make a water purifier.

There are some tropical plants around the forest. The leaves of these plants are oval. They are picked off one piece and made into a funnel with a very small outlet. Then they start to be filled with charcoal debris, then fine sand, and finally stones.

The funnel is heavy, sand and charcoal are the main filters. Because the density is small, it can retain impurities in the water, while the pervasive water passes through fine sand and charcoal.

The soil cannot be completely dissolved in water. After purification, impurities in the sewage will remain in the original water purifier, and clean water will flow out of the water purifier.

"It sounds so profound..." Han Xuening is a teacher in the tribe, responsible for teaching the civilization passed down from the previous generation. She inherited many animals, as well as the iron shells that flew into the sky and the sea.

However, I have no impression of the magical water purifier.

"Now is the time to witness the miracle!" Zhao Yunxiang used leaves to make something like a vase, which can be used to temporarily store water.

Use shells to fetch water in the sewage puddle, then pour it into the water purifier. The sewage slowly penetrates fine sand and charcoal and slowly flows out from the opening below.

However, the water flowing out of the water purifier is not very clear, but is still turbid.

"!!" Han Xuening glanced at the confident man curiously, and found that his original confidence gradually turned into confusion.

"Actually... the dirty water can be drunk after it is cleared." Han Xuening was persuading Zhao Yunxiang, "It is already very powerful to get water from the soil, so don't be too self-centered... Huh?"

The turbid sewage originally flowed out of the water purifier was slowly becoming clearer and seemed to have reached the clarity. Zhao Yunxiang began to use the leaf water storage device to start filling water.

"It's true that I expected!"

Zhao Yunxiang has been a little unconfident since just now. He just completed the water purifier and was unsure.

The internal structure of the water purifier is not compact at all. There is even a large gap between charcoal and charcoal. When water flows through the middle, it will naturally bring out some charcoal and fine sand and dust.

However, after the water was washed away, the density of charcoal and fine sand instantly decreased. A small piece of sank into the original water purifier could be seen from the naked eye. The fine sand and charcoal debris became more compact under the action of water.

The density of the filler with almost no extra gaps becomes smaller. Except for water with extremely strong penetration, other fine dusts that cannot be completely dissolved in water are blocked in fine sand and charcoal.

A few minutes later...

There are 4 leaf bottles used for water storage, and these water is about 2 liters, which purified more than 2 liters of water, and the water purifier has also reached saturation.

The charcoal in the water purifier absorbs too much dust and impurities, and the water purification effect has greatly slowed down, and the water is not clear.

In this world, everything has a critical point, just like when people eat, the cup stores water, and after reaching the maximum value, it will overflow.

Just like the bamboo charcoal we often use to purify formaldehyde, when the bamboo charcoal is full of formaldehyde, it will not work, but will instead excrete the absorbed formaldehyde.

...

Everything is ready, and the medicine is started!

Because of the lack of water storage, six natural calcium carbonate pots were prepared. The flames were burning in the six stone stoves, and the hot water boiled in the smoked and black shells.

Zhao Yunxiang was crushing herbs with stones and putting them into the pot according to the randomly prepared ratio.

A huge leaf was covered with a shell, which was the original pot lid.

The medicine soup was being cooked, but Zhao Yunxiang was not idle. He wrapped the green crabs tied up with leaves, then put them in the fire, and separated by several layers of leaves to steam and cook.

As for conchs and clams, they are burned to death with fire, then picked out the meat and placed on the stones on the outer layer of the fire.

The stone that has been roasted by fire for a long time is equivalent to a frying pan, which can be used to fry meat...

...
Chapter completed!