Chapter 164 Change the Bat! Change the Bat Again! (Ten Thousand Rewards Plus 6 Updates)

Anatomy.

Anatomy.

The sword flashed.

Cut open the chest, cut open the abdominal cavity, cut open the neck and head. Observe internal organs, observe organs, observe blood vessels, omentum, and subcutaneous tissue——

When the cause of death is unknown, the scalpel is the torch that illuminates the fog in the darkness.

Grete concentrated on dissecting and exploring. The rabbit's lungs, internal organs, and blood vessels were bleeding everywhere. The bleeding was extensive, there were no adhesions, inflammation, or other organic lesions, and there were no sharp wounds. Basically, it can be presumed that... it was caused by ultrasound.

"Um, Bernard...Bernard?"

Gretel put down the scalpel and prepared to call the barbarians over to stew, roast, or whatever he wanted to do with the rabbit. When he turned around, the barbarian picked up another rabbit and stood next to him, looking at him expectantly...

The belly of the new rabbit was cleanly shaved, with a slight pink color that contrasted with the surrounding black fur. Hanging in Bernard's hand, he kicked his legs desperately, looking like "I'm very energetic, I don't have heat stroke."

Well……

Gretel sweated. One rabbit is not enough for you! I didn't want to split the rabbit's legs!

"Bernard, don't eat this rabbit yet... No, let's not do the experiment yet. I have to think about it... What went wrong with this experiment? I have to think about it for a while..."

Grete went home and finished his routine meditation. He built another bone for the "self" composed of mental power - there were only eight bones left to complete - and once again devoted his energy to B-ultrasound magic. He thought a lot, thought hard, and had random thoughts...

Well, I tried to think about it over and over again, but I still can't figure out where the problem is. I had no choice but to think deeply and start from the description of B-ultrasound in "Medical Imaging":

"B-ultrasound uses 1 to 10 megahertz ultrasonic waves to propagate in human tissues... uh..."

1~10 MHz?

That is, 1,000,000 Hz to 10,000,000 Hz?

What is the frequency of ultrasonic waves emitted by bats?

It’s over, I can’t remember...

But this time, Gretel remembered something again:

The higher the ultrasonic frequency, the worse the tissue penetration ability, but the higher the resolution of adjacent objects; the lower the frequency, the stronger the tissue penetration ability, but the worse the resolution of adjacent objects.

So when he used the echo magic before, he could "see" the rabbit cage, table and ground below through the rabbit, but he couldn't "see" the rabbit's body tissue clearly. Is it really because the frequency of the ultrasonic wave is too low?

How does he increase the frequency of ultrasound?

Looking for an ultrasound probe?

Thinking too much!

Looking for a tuning fork?

Tuning forks probably don't emit ultrasonic waves.

Is there any magic that can adjust the frequency of sound waves?

Some images and sounds popped up in Grete's mind: a rock radio, a knob, "Welcome to FM 89.7 MHz..."

Stop it, stop it! That's listening, not sending!

Anyway, just find the reason why the magic failed. Grete went straight to the laboratory after class the next day, took out five different bats, and lined them up. Pick up the rabbit, apply sweet almond oil, and start——

Sure enough there is a little difference!

The flying fox, which is the largest and has the widest wingspan, emits ultrasonic waves at the lowest frequency, and the images in its meditation field of view are also the blurry;

The most common and cheapest black bat, the frequency is slightly higher and the resolution is clearer, but still not up to Gretel's requirements;

It is a small gray bat, only as big as Gretel's palm. The range of the ultrasonic image only covers the rabbit and the rabbit cage...

According to the size of the rabbit, if you reduce it by one circle, you can almost see the internal organs.

The idea of ​​changing bats is right! Grete was greatly encouraged. However, in the last experiment, the Magic Council provided only 5 types of bats, and he...had to go to the street to buy them.

Amitabha, God bless you, the God of Nature, the God of Magic, etc. all bless you - bats, don’t be too expensive!

He couldn't afford it if it was 5 gold coins each!

He went straight to the store where he last inquired. The young clerk who had previously agreed to pay the deposit and leave the goods for him still had some impression of Gretel. When he saw him come in, his eyes lit up:

"Mr. Wizard, you're here again! - Do you want more bats?"

How did you know I wanted a bat? ! Grete was startled: "How much does one cost?"

"...5 copper coins each, as if alive or dead."

The clerk's voice was muffled. Gretel was shocked: "Did it fall so much?"

"Isn't that right..." The young clerk sighed in frustration. Taking advantage of the shop owner's absence, he leaned down on the counter in front of him, resting his chin between his arms. From the skull to the spine, the entire body was paralyzed into a soft piece, with the word "mourning" written on it from top to bottom:

"I don't know which mage published an article, saying that studying bats is dangerous and will lead to disease. Now it's better. Many buyers who ordered bats don't want them anymore, and some even return them after they bought them. Our store is overstocked. There are thousands of them! If I don’t think of a way to sell them, I can’t even afford to serve them..."

This month's salary will also be discounted. Not just this month, but next month, the next month, the next month, maybe even half the discount...

"Well……"

The initiator of the big price cut on bats is a little guilty, but also a little happy. He blinked and came closer:

"Does your store have a complete range of bat varieties? If so, I will buy them here instead of going elsewhere!"

"It's all in order!" The young clerk jumped up. "We have more than ten kinds at home! Even if we don't have them all, I can go to other stores to buy them! Mr. Master, sit down while I go run around and collect them all for you! How many of each kind do you want?"

5 copper coins each, one of each of the 20 kinds, is a gold coin. Gretel pinched his wallet, took out a gold coin between his index finger and thumb, and pushed it on the counter:

"It depends on how many kinds you can collect. If you can get 20 kinds, I will buy 5 of each kind first, and then I will buy more when I find the kind I want."

"Okay! Don't worry, Mr. Master - otherwise, you can leave your address and I will deliver the goods to your door?"

That afternoon, when it was dark, Grete received a basket full of bats. There are forty or fifty kinds, large and small, divided into categories. They were all dead, and each one was individually wrapped in a straw bag with a note wrapped around it, with the name of the bat written on it.

Considering that in his previous life, there were only more than 900 species of bats in the world, Gretel suspected that he had collected all the bats in the country.

...wallet bleeding.

Gretel endured the heartache, took out half of the gold coins in his wallet, and sent the young clerk away. Turning around, facing this big basket of grinning, scary-looking things, he became angry:

"...Ouch!"

When should I try it?

The number of spells I can cast every day is limited!

Although you are doing experiments, you should try various experimental materials - for example, when Edison invented the electric light, he tried nearly 1,600 filament materials - but there is a team below!

And me?

It’s all up to me to try!

I want an assistant! assistant!

"Grete, don't be anxious, let's try slowly." His only assistant, Bernard the Barbarian, came over to comfort him, with a considerate look on his face:

"I can't eat ten rabbits in a day anyway..."

Thanks to x-on:Shanguan for the 500 starting coin reward

Thanks to x-on:for the 100 starting coins from the carnival in the toilet

Congratulations to everyone for collecting another 10,000 yuan reward~~~This is an additional update