The Whitney cotton gin, also known as an invention of both an angel and a devil, saved American cotton plantations, but extended the existence of slavery and allowed the trafficking of black slaves to last for decades.

The reason why Qin Song knows so much is not accidental. This is due to his grandfather Quan Yanming, a professor of mechanical design, manufacturing and automation at a certain university of science and technology, has been engaged in mechanical design education for a long time and has trained dozens of talents in the field of mechanical design for the country.

In Qin Song's childhood, due to his parents' work, most of his time was spent at his grandfather's house. After retirement, my grandfather liked the most was to tell him various interesting stories about inventions, take him to visit various science and technology museums and civilization development museums, and try to cultivate his scientific interests since childhood.

But in the end, because of Qin Song's personal interests, he did not engage in the mechanical industry, but devoted himself to the Internet tide. However, that precious childhood still left a deep impression on him.

This is the main reason why Qin Song regards Alice as his greatest wealth!

"Alice, those who love teachings will love wisdom. Those who hate counsel will fall into ignorance." Qin Song's confident voice echoed: "Your sincerity is touched, and you deserve a response from wisdom."

Mind value consumption 1.

Mind value consumption 1.

Mind value consumption 1.

A wooden box appeared slowly at Alice, with her familiar handles on the outside, and inside were two adjacent rollers, one with hook teeth like a beast's teeth, the other with brushes like horse's hair, and a row of metal teeth connected to the hook teeth rollers on the side.

A total of 11 points of mental value was consumed, almost a day's mental recovery amount, which made Qin Song feel a little distressed, and he couldn't bear to consume any irrelevant cotton in his mind.

"Alice, a person who is good at thinking, can burst into sparks of wisdom. Use your imagination, I will always be staring at you."

Alice understood the meaning of the gods, and asked her to think and explore the function of this tool. She gently held the shaking handle with her hand, causing the hook teeth to rotate, and the fixed brush wiped the hook teeth, making a squeak sound.

There is no doubt that this must be a great creation!

Alice easily understands its mechanical structure, wooden rollers, metal hook teeth, and hard bristle brushes. Everything looks so simple, but the combination becomes a whole, so harmonious, full of wonderful beauty.

"Alice thanks for your enlightenment! The great god, bathed in the light of your wisdom, makes me feel extremely lucky and extremely proud."

"If you love wisdom, wisdom will love you. If you embrace wisdom, she will also give you glory. Go, child, spread the light of wisdom."

After breaking out of Alice's dream, Qin Song checked his fatigue level and only increased by 23%. It seems that the length of time he stayed in the dream is linked to his integrity. Otherwise, at the rapid increase in fatigue level at 1% completeness, he could only stay in the dream of two witches for a short time one night.

Linda must also be looking forward to his arrival, and there is another Elena who needs to be discovered urgently. Time seems to be insufficient. The only solution is to unlock [connecting the thalamus] and realize the connection of dreams as soon as possible.

Alas, it’s just a poor mental value. After advancing to the [Eye of Insight] and embodying the cotton gin, there is only a poor single digit - 4 points.

Linda lay in the small bed, her eyes opened and she stared at the roof in a daze. This was the third time she had woken up, but she never dreamed of a great god.

This made her feel a little disappointed. It must be that I am too stupid, right?

What wonderful knowledge does the stones in nature have? Linda has been thinking about this question countless times, but she still can't find a clear answer.

Gradually, Linda entered her third sleep. In the dream full of soft light, she held a stone in her palm, searching around while thinking about the answer.

When he arrived at Linda's room, Qin Song first inspected her condition.

Tiredness increased by 5%.

Name: Linda Paltrow.

God of Faith: The God of Dreams of the Innocence Girl, the Lord of Thousand Witches, and the Majestic Krem.

Faith: 52% (believe)

Loss: 37% (lost)

Characteristics: Heart of Rock

Level: lv2

Physical constitution: 11

Magic: 5

Potential:★★

The power of rock lv2, proficiency is 22/60, and can draw strength from the rock and store it in the stone skin. The increased rocks absorbed will disintegrate.

Compared to Alice, Linda's upgrade is indeed slower, but she is already working hard to practice her abilities, but this is the innate gap between two-star potential and three-star potential.

"Linda, I feel the loss in your heart." The greatest use of loss is to judge the emotional state of the witch so that the right medicine can be prescribed.

Linda raised her head in surprise, and her long silver hair spread out, her eyes were filled with excitement and a little ashamed: "Great God, am I too stupid? Until now, I have not found the answer in nature."

"Hahaha...child." Qin Song's kind-hearted laughter came: "Every field of nature is wonderful and profound. I sensed the growth of the divine power in your body, and you have obtained the key to understand the answer."

"Is that true?" Linda raised her pretty little face and showed the stone in her palm: "I can feel that there is a certain power in the stone."

"That is the power of nature." Qin Song patiently encouraged her: "Stones are the foundation that constitutes the world, and stones are the most generous gift of nature. They are everywhere and no one pays attention to them, and always silently supports the world in the most simple and silent posture. And you, Linda, will use your divine power to personally uncover the secret hidden in the stone."

Qin Song did not lie. The importance of stone to human civilization is no less than flame. Whether it is construction, smelting, transportation, agriculture, industry, as well as aerospace, aviation, navigation, electronics, weapons and equipment, including CPUs that collect the essence of human wisdom, most of their raw materials are taken from stones in nature - that is, various minerals.

Hearing the gods praise the stone, Linda's eyes gradually became fierce. She never expected that this inconspicuous stone would actually be the foundation of the world.

And she gained the divine power to explore the secrets of stones.

What a lucky and so favor this!

It turned out that the gods never looked down on her, but generously gave her such great divine power. A tearful look appeared in Linda's eyes: "Great God, thank you for your favor to me. I will let go of all doubts, please enlighten me and explore the knowledge in the stone."

"Linda, there are millions of stones in this world, and there are millions of secrets. Every different stone has its unknown wonders."

"My wise god, I have a request." Linda did not forget her friend Alice, and half-kneeled devoutly: "Alice and I have become your believers, fulfilled your prophecy, and became friends. Now, I want to ask you for advice for my friend Alice..."

"Linda, Alice has been inspired by me, and I believe she will make good use of it."

Linda was stunned for a moment: "You really know everything."

"But Linda. The solution to the problem is never the only one. You will also get my enlightenment, a different enlightenment!"

“Listen to your wisdom.”
Chapter completed!