The blowtorch that Ding Qi wants to make can also be called a pump, because it is made according to the principle of a pump.

Cut a bamboo 10 centimeters thick, cut off a bamboo tube about 50 centimeters long, and sawed off the two ends of the bamboo for later use. Then polish the two pieces of bamboo, one of them is the same diameter as the bamboo tube, and drill a round hole with a diameter of one centimeter at the edge, which is connected to a thin bamboo of the same diameter as an air outlet.

Another piece of bamboo is polished into a round board about three millimeters smaller than the diameter of the bamboo tube, a small eye of one and a half centimeters is drilled in the middle, a straight wood is installed as a push rod, and a round hole with a diameter of one centimeter is drilled next to it, and a wind tongue is installed on the inner side of this hole as an air inlet. The edge of the wind-blocking round plate is wrapped with a layer of rabbit skin, which can ensure that there is no gap between the wind-blocking board and the bamboo tube, and can also play the role of lubricant.

When the rod is pushed and pulled, the wind enters the ash furnace along the air outlet to promote the combustion of the fuel.

This blowtorch was made using the principle of a pump, but the production and installation of the tongue took one-third of Ding Qi's time. The material should be light, the size should be appropriate, and it must be able to stick to the wind barrier board and not fall easily. This hair dryer uses a hand saw, a multi-purpose Swiss Army knife, and an axe, but it has the disadvantage of ensuring that the tongue is vertically downward. For this purpose, Tinch made a mark on this blowtorch.

It was already nine o'clock in the evening, and Ding Qi felt that he was still in good spirits, so he broke the bamboo that had been cut back, made some bamboo strips, and then prepared to make a bamboo plaque for drying food. Just like those bamboo shoots after blanching, it is more troublesome to collect and dry, and it is more convenient to have a bamboo plaque.

The night was very quiet, and from time to time two night bird calls sounded, and there were no external objects to disturb him, and Ding Qi carefully and meticulously weaved the bamboo plaques by the light of the bonfire. First of all, the bamboo strips are placed in the cross-warp and weft directions one by one, stacked on top of each other, pick one and press one, and form the bottom of the plaque about 60 centimeters long, and then all the bamboo strips are bent and superimposed along the edge of the bamboo plaque to the right side, and at intervals they are tied with a piece of green bamboo skin, and then continue to be superimposed until a frame is formed.

At this point, a bamboo plaque is made, but it is not so beautiful, this is only Ding Qi has seen others make it up before, otherwise it may not be able to be made.

The next morning, Ding Qi used the time between cooking to patrol the forest as usual, and only caught a rabbit, which Ding Qi threw to the cutie for breakfast. Now the lynx can eat raw meat, but every now and then there is a bleating, which makes Ding Qi want to kill the two goats and eat meat. In addition to these, a lot of mushrooms, fungus and dandelions were also picked up. By the way, he cut back a large basket of grass and fed it to the two sheep, especially the ewes have adapted to the current life, and they are no longer afraid of Ding Qi, and when they are full all day, they will lie there and chew their mouths full of white foam, like a white beard, and it is becoming more and more like a goat.

Spread those bamboo shoots in the bamboo plaque and put them back on the big stone, Ding Qi came to the ash kiln, and first touched the mud shell outside the pit where the charcoal was burned, it was very hard, not hot to touch, but there was still a certain amount of heat, and it was estimated that it could be knocked open in the afternoon to see if it was successful.

In the ash kiln, the firewood has long been burned to ashes. The character of the borehole has undergone essential changes, and it has been burned into a piece of pottery, which is very rough, slightly deformed, and concave downward, and the sound is crisp when it is struck, but it is like fairy music in Ding Qi's ears. I didn't expect that the rifle made of yellow mud was successfully fired, and I have to say that Ding Qi was lucky.

Waiting for the charcoal to open the furnace, Ding Qi returned to the wooden house, took out a straight knife, broke the bamboo slivers, and prepared to make a bamboo sieve.

The sieve consists of four bamboo pieces one centimeter wide and fifty centimeters long as the skeleton, first placing the two bamboo pieces in parallel, with one-third of the bamboo pieces in the middle of the long distance, and then placing the other two bamboo pieces vertically on the two parallel bamboo pieces, the middle distance is also one-third of the length of the bamboo pieces, and each bamboo piece is stacked on top of each other to form a basic skeleton.

After the skeleton is built, the bamboo strips are placed in the middle of it, and the method of picking one and pressing one is still adopted, and the interval between each bamboo strip is half a centimeter. At the end, it continues to be overlaid in one direction, tied with green bamboo bark, and a bamboo sieve is made. In the future, when making pottery, you can first use a sieve to sift out some clean fine soil, which increases the probability of becoming pottery, and at the same time, the quality of pottery will also improve.

Back to the ash kiln again, Ding Qi used a bamboo sieve to try it, and it felt good, the soil sieved out was still relatively fine, and some impurities and stones and other things could be separated. After sifting five times in a row, a lot of fine soil was obtained, and they were piled into piles, sprinkled with water and soaked to form a ball like noodles, and then placed in a cool place under the tree, and then sprayed evenly on the surface of the mud with water in the mouth, wrapped in a few large leaves, and began the preparation work before firing the pottery, refining the mud.

It took Ding Qi more than a month to learn the art of pottery, and this is only one of his many survival skills.

After lunch, the little cutie who had been playing with the lamb for a morning was napping under the shade of a tree not far away. At this time, the temperature in the charcoal pit had completely cooled, and Ding Qi took a shovel to break the outer layer of mud shells, revealing the black charcoal inside.

Most of the wood was burned into charcoal, and only a little of the outer layer of wood near the soil on either side remained unburned, or the core. But it's already very good, he is the first time to burn charcoal, and the principle and method are derived from previous texts and related knowledge patched together on the Internet. This made it can't help but laugh at itself, and it has become a charcoal seller.

Pile these charcoal into blocks next to the ash kiln, clean up and prepare to burn lime and then burn charcoal again, there will be more and more places to use charcoal in the future, there is no harm in burning a little more, anyway, the primitive society wood is used casually.

But as soon as this idea came out, Ding Qi was shocked, because of the emergence of deserts and the disappearance and extinction of a large number of wild animals caused by human deforestation. It seems that more attention should be paid to this aspect in the future, and artificial afforestation can definitely solve this problem.

The dozen or so pieces of limestone were brought over, and all the stones were put into the ash kiln using the method of one layer of charcoal and one layer of stones, and a layer of charcoal was piled up on the top.

Ignition.

The charcoal burned, producing some black smoke, but much less than the previous burning of wood. Ding Qi used a blowtorch to pump air inside, a large amount of air entered, and the charcoal burned rapidly, and the flames produced rushed straight through the top of the furnace, and the charcoal on the upper layer was also lit, and the more it burned, the temperature also rose rapidly. Slowly, some stone chips began to fall from the surface of the limestone, but after reaching a certain level, Ding Qi felt that the temperature did not continue to rise, and the stone chips did not fall much.

Ding Qi patted his head, only to find that the top of the ash kiln was missing a lid, and the temperature could not be kept in the kiln all the time. Quickly retrieved a stone slab from the surrounding area and covered it, Ding Qi no longer cared about the situation in the ash kiln, but only encouraged the blowtorch to blow a large amount of air into it until all the charcoal was burned.

Taking advantage of the gap in the lime burning, Ding Qi chopped out a pile of wood, threw it all into the charcoal pit, lit it on fire, and sealed it with a layer of mud shell, just waiting for the last out of the pit.