Release that Witch

741. Chapter 741.

……

    Roland rubbed the fine sweat on Anna’s forehead and held her in her arms.

    In the dim light, you can still see a seductive blush on the girl’s face.

    Since the last time she talked to her about dreams, Roland always feels that Anna has become more proactive in this regard, and will try to learn some new skills – just like the knowledge in books, her progress in this area A lot slower. Looking at Anna’s clumsy and serious appearance, it is a completely new experience for him. The visual enjoyment even surpasses the sensory experience. The superiority of an old driver comes to life.

    Of course, the storytelling time after the joy is always inevitable.

    Sniffing Anna’s scent, Roland tweeted the new news from Taqila witch and his own guess of War of Divine Will.

    “Although I have long known that we are in a place where the mainland is only a glimpse of the mainland, we did not expect that there was a civilization that was completely different from ours under the mountains…This world is really full of unknowns. ”Anna exclaimed, “Maybe one day, we can also set foot on the distant land to see what kind of secrets are hidden in the world across the sea.”

    “There will be a day, I promise,” Roland laughed back.

    Even if the sea can’t get through, you can fly over—the land that you can see with a telescope is never too far away. When there is an internal combustion engine, large airships will be used.

    “However, is there really a gods in this world? Leaving the relics, prompting us to kill each other…Maybe it is looking at us somewhere. ”

    “Are you scared?”Roland couldn’t help but tighten her arm and lift her closer.

    “No, I want to thank it.”

    “Why?”He gave a slight glimpse.

    “Because it sent you to me.”Anna looked up and whispered.

    Roland saw the blue lake light in the other’s eyes – it was her undisguised feelings.

    He felt that there was a surge of heat in his heart.

    “I will stay with you all the time.”

    “But you impossible always stay with me.”

    “I …

    When he was halfway through, he was stopped by Anna.

    “You are King, and you will be the commander of the Devil army in the future. How can you stay in Neverwinter City?” I can’t occupy all of you because of my own desires. Soldiers who fight on the front line need to see you, and people in other cities want you to be with them. ”She said softly, “Roland, can listen to you telling me stories like this, I am very satisfied.”

    Roland was silent for a moment. “You are right, but no matter where I am, you can hear the story I said…I can guarantee this. ”

    Anna’s eyes blinked, as if he had heard what he said, “Don’t rely on Listening Sigil?”

    “Yes,” he nodded.

    If the love between the two is also conveyed through Listening Sigil, how can it be said?

    “What do you want to do?”

    “You will know tomorrow,” Roland rolled over and pressed Anna under his body, then kissed her neck…Then slide from the neck to the collarbone and leave a shallow mark on the white skin. “But now, it’s time for me.”

    The two joined together again, and the sweet gasping undulating echoed and never dispersed.

……

    After breakfast the next day, Roland rejoices with Anna into the backyard of Northern Slope Mountain.

    “Good morning, Your Majesty.”Lucia had to come earlier, she put down the work she was doing and bowed to him.

    “Good morning, His Majesty The King! Good morning, Anna sister! Nightingale sister! ”Bell also learned the appearance of her sister, and bent down happily.

    Roland smiled and waved his hand, indicating that they didn’t have to pay more, then went to the workbench, pulled out a White Paper, and painted the design. He intends to complete the promise made last night when Taqila survivor has not migrated to the Western Region’s – a contact tool that can communicate with Anna at any time without the need for magic power.

    That is the wired phone.

    The principle of the telephone is very simple, but it is the most basic application of the electromagnetic induction phenomenon: the sound wave causes the metal reed in the microphone to vibrate, causing the magnetic flux to change in the magnetic field, and finally the induced current is suddenly large and small. The earpiece is the reverse, using the electromagnetic coil to generate a large and small magnetic force, causing the diaphragm to vibrate and restore the current to sound.

    In other words, it is not fundamentally different from generators and motors, except that the latter turns the vibration into a rotation and the power is much greater.

    When he explained his ideas and designs, Anna immediately understood how this unprecedented call tool worked.

    “I am going to call Mystery Moon and Soraya!”Her eyes are shining.

    CurrentInterchange with sound? ”After the nightingale was still amazed, she looked at Lucia as if she wanted to find a sense of identity, only to find that the latter was thinking.

    “Electricity and magnetism are born, and magnetic is transformed into force…So that’s it. ”

    Even the little girl’s bell yelled, “Sister, are you talking about the second chapter of the «Elementary Physics»?”

    Nightingale was suddenly hit, and a heart of the dred fish was picked up and turned into the fog.

    Looking at this scene, Roland couldn’t help but laugh. Be that as it may , the phone that wants to get useful features is not that simple, the problem is in signal transmission.

    The electrical signal is attenuated.

    This is also the reason why the phone was not developed on a large scale after it was developed early. Once the distance is too long, it is difficult for the other end to hear what it is. It was not until the invention of a tube that could amplify electrical signals that it quickly became popular.

    Regarding the electrical part is not Roland’s strengths, the books he wrote at the beginning did not basically get involved in this aspect. Now, even with the help of the dream world, he found that making electronic tubes is still quite a troublesome thing.

    Since you don’t plan to amplify the signal, you only start by reducing the attenuation.

    For example, increase wire size and reduce route loss.

    The former is very simple to implement. Anna’s black fire can accurately process the required copper wire. According to the memory data, the four-meter-diameter wire can maintain about five or sixty kilometers of relay-free communication, while the general telephone. The line is only 0.4 to 0.6 mm. This is a waste of time, but it can effectively avoid the trouble of the signal amplifier.

    The latter can use coaxial cable to achieve the purpose – the so-called coaxial cable, is to wrap a metal mesh around the wire, the two are separated by insulating material, so that the metal mesh becomes a Faraday cage, the electrical signal The divergence is minimized. At the beginning of the popularization of the telephone, the technology of wrapping the metal layer was not mature, so the loading coil was used at that time, that is, a spirally wound coil sleeve was placed outside the wire to reduce signal loss. But for Roland, there is no need to follow this rule. With Anna’s processing capabilities and Soraya’s special coating, it’s all in one step.