When I heard Ella mention the instrument in his hand, Boyle came to his spirit: "It is indeed the King of Sweden, your Eye of Hermes! But I made a little change. The Eye of Hermes uses a convex lens and a concave lens to see things in the distance. My instrument uses two convex lenses..."

From principle to manufacturing, the Eye of Hermes was completed by Ella, so before Boyle finished explaining, Ella reacted: "This way you can see very tiny things!"

"Yes! In order to make a drug that is more effective for the Black Death, Mr. Paracelsus always wanted a pair of eyes that could see the subtle, so I thought of this..."

Before Boyle finished speaking, Ella snatched the Eye of Hermes from Boyle's hand and put her eyes on it.

"So amazing! You can clearly see the limbs of fleas! If you increase the magnification, you may be able to observe the basic elements that make up the substance!" Ella shouted excitedly, "Boyer, from today on, you can enjoy the allowance as a teacher!"

"Teacher's allowance?" Boyer was surprised. "King of Sweden, I have not been admitted for a year, and it will take a long time to graduate..."

"What's the problem? Gottfried hasn't even entered the school!" Ella patted Boyer's shoulder encouragingly, "I know in my heart how superb alchemy skills are needed to create such lenses. You are already qualified to be a teacher. Do you want to teach as a teacher directly?"

"I...? I want to continue learning the skills of alchemy with Teacher Paracelsus..."

"It's OK, but the allowance is given to you. Be sure to continue to improve this instrument - by the way, Boyle, have you studied astronomy?"

"Astronomy? I learned a little..."

"Has I learned?" Ella grabbed Boyer's hand and stuffed the stack of information into his hand. "Then you can find a special place if you look carefully at this stack of information?"

“Special place?”

Boyle carefully flipped through the stack of data. This stack of data consists of two parts: the top is Ella's astronomical observation data, a series of dense numbers; and the bottom is a series of illustrations, which are dozens of new rounds added by Ella on the Ptolemy's orbit in order to explain these data.

When he saw the first part of the information, Boyer said nothing. When he saw the second part of the information, Boyer shook his head: "Who wrote this information? It looks very mediocre, and I don't want to read it carefully."

"Mediocre?" Ella didn't expect Boyle to describe her work like this. "If you take a closer look, the previous data cannot be explained by Ptolemy's this round, and the subsequent data can be explained better..."

"I can't understand too profound astronomical knowledge." Boyle said, "What I see now is an extremely complex system. Ptolemy's celestial system is very simple and beautiful. The system in front of me is like a piece of rag sewn on clothes in the east and a piece of rags sewn on the clothes in the west. It seems to be trying to cover the hole, but it is just trying to cover it up."

Ella argued hard: "But to explain the previous data, you can only use such a complex system..."

"I don't think so." Boyer's hand drew a circle on Ella's manuscript paper. "You see, the rounds on this are still the same as Ptolemy's theory, and are perfect circles. Has the person who wrote this manuscript considered other trajectories of different shapes? Maybe he thought that the circle was the simplest, but for this simplicity of detail, the entire system became bloated and complicated. This is not the way of a smart person. In fact, I think that Ptolemy's use of perfect circles to draw these trajectories is theoretically untenable..."

"How could it not stand?" Ella was anxious, "The trajectory of the star body is a perfect circle, which was proven by Aristotle's theory!"

"I know Aristotle's way of argument. 'The birth of things is because there is a certain opposition in the object itself, and the extinction of things is the transformation of one opposite of the object into another opposition. The birth and death of objects only appear when there is an opposition in the object.' Isn't this premise very strange?"

"I think it's strange that your knowledge is too poor!" Ella shouted, "Since you are an alchemist, you should know that matter is composed of four basic elements: wind, water, fire and earth. Then, please answer me, what are these four elements composed of?"

From Ella's reaction, Boyle already knew who the owner of the manuscript was. However, he replied seriously: "Cold, hot, dry, wet. Cold and dry are earth, hot and dry are fire, hot and damp are wind, cold and damp are water. If heat is converted into cold, fire will be turned into earth."

"That's right! Cold and heat are a set of opposites, dry and wet are a set of opposites. Because of this relationship, the four elements can transform each other. Matter never disappears, but are just transforming. Converting from other matter is life; converting into other matter is death! What will happen if an element does not have any opposites? Answer me, Boyle?"

Boyer was stunned: "You are talking about the fifth element ether, independent of the four elements. Without any opposites, there is no way to convert it into any and other substances... that is... immortal?"

"That's why Aristotle said, 'The birth of things is because there is a certain opposition in the object itself, and the extinction of things is the transformation of one opposite of the object into another opposition. The birth and death of objects only occur when there is an opposition in the object'. Is there any problem with this?"

Boyle was speechless and had to bow and apologize: "Your knowledgeable King of Sweden is beyond my reach. I am ignorant of my skills."

But Ella was still on her head and continued to say endlessly: "The star body is immortal, so it does not have any opposites! The star body moves eternally, so its trajectory can only be a circle without any opposites! It cannot even be an elliptical, because it is a composite motion of circles and straight lines, and the linear motion has an opposite. If there is an opposite, the state will change! You would not forcefully refute me that the star body will perish, and the movement of the star body will stop, right?"

Speaking of this, Ella was stunned for a moment. Her mind began to build a trajectory model based on "the demise of astral body". But she quickly shook her head and wiped this absurd thought out of her mind.

"Although I think those who regard astral bodies as gods are unreasonable. There is no doubt that astral bodies are immortal! From childhood to adulthood, from ancient times to present, I have never seen a record of the destruction of astral bodies! Unless we can witness the destruction of astral bodies with our own eyes, those who make such assumptions can only be ignorant fantasies!"

The doctrine was criticized for being "mediocre", which was the first time for Ella. Therefore, the anger in her heart was unprecedented. But just as she was about to continue speaking, the door of the laboratory was pushed open brutally, and a soldier rushed in:
Chapter completed!