It's not that hard to open a hospital in another world, right?

Chapter 164 Changing Bats!Change the bat again! (6 rewards plus [-])

anatomy.

anatomy.

Knife light flickered.

Open the chest, open the abdomen, open the neck and head.Observe internal organs, observe organs, observe blood vessels, omentum, subcutaneous tissue——

When the cause of death is unknown, the scalpel is the torch that illuminates the mist in the dark.

Gretel concentrated on dissecting and probing.The rabbit's lungs, internal organs, blood vessels, dots, are bleeding everywhere.The bleeding is extensive, there are no adhesions, inflammations, or other organic lesions, and there are no sharp wounds. It can basically be presumed that it was done by ultrasound.

"Well, Bernard... Bernard?"

Gretel put down the scalpel and was ready to call the savages over to stew the rabbit, roast it, or do whatever he wanted.Turning around, the barbarian picked up another rabbit and stood beside him, looking at him expectantly...

The belly of the new rabbit was clean-shaven, showing a slight pink color that matched the surrounding black fur.Hanging in Bernard's hands, he kicked his legs like hell, with an "I'm alive, I'm not heatstroke" look.

Uh……

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

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

Gretel finished his routine meditation at home, and shaped another bone for the "self" composed of spiritual power—it was only eight yuan away—and once again devoted his energy to B-ultrasound magic.He was thinking, thinking hard, thinking wildly...

Well, I tried to think over and over again, but I still couldn't find out where the problem was.I had no choice but to sink my mind, starting from the description of B-ultrasound in "Medical Imaging":

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

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

How many Hz is the ultrasonic wave emitted by bats?
It's over, I can't remember...

But with this stroke, Gretel remembered something again:
The higher the ultrasonic frequency, the poorer the tissue penetration ability, but the higher the resolution of adjacent objects; the lower the frequency, the stronger the tissue penetration ability, but the poorer the resolution of adjacent objects.

So when he released 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 tissues clearly. Is it because the frequency of the ultrasonic wave is too low?

How would he increase the ultrasonic frequency?
Looking for an ultrasound probe?

Think more!
Looking for a tuning fork?

The tuning fork probably doesn't emit ultrasonic waves.

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

Some images and sounds popped up in Gretel's head: mineral radio, knob, "Welcome to FM 89.7 MHz..."

stop stop!That's listening, not sending!

In any case, it's good to find the reason why the magic fails.Gretel went straight to the laboratory after class the next day, and found out five different bats, lined up in a row.Pick up the rabbit, apply sweet almond oil, and start—

Sure enough, there is a little difference!
The largest flying fox with the widest wingspan emits the lowest ultrasonic frequency, and the image in the meditation field of view is also the most blurred;

The most common and cheapest black bat, the frequency is slightly higher and the resolution is clearer, but it still can't meet Grete's requirements;
It is a small gray bat that is only the size of 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 it is reduced by a circle, it can almost be used to look at the internal organs.

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

Amitabha, God bless, the god of nature, the god of magic, etc. - bats, don't be too expensive!

If it is still 5 gold coins, he can't afford it!

He went straight to the shop where he made the last inquiry.The young clerk who had promised to pay a deposit to keep the goods for him, still had some impressions of Gretel. When he saw him coming in, his eyes lit up:
"Mr. Mage, you are here again!—Do you want more bats?"

How did you know I wanted a bat? !Gretel was startled: "How much is one?"

"... 5 copper coins, as alive as dead."

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

"Isn't that..." The young clerk sighed ruefully.Taking advantage of the shopkeeper's absence, he lay down on the counter in front of him, resting his chin on his arms.From the skull to the spine, the whole body became limp, and the word "mourning" was written from top to bottom:

"I don't know which mage posted an article, saying that studying bats is dangerous and you will get sick. Now it's over, many buyers who ordered bats don't want them, and some of them come back after buying them. Our store has a backlog Thousands of them! If you don’t try to sell them, you won’t be able to serve them..."

And this month's salary will also be discounted.Not only this month, next month, next month, next month, next month, if not, they will be discounted in half...

"Uh……"

The instigator of the big price cut on bats was a little guilty, but also a little bit elated.He blinked and moved closer:
"Do you have a complete range of bats in your store? If they are complete, I will buy them here instead of going to another place!"

"It's all there!" The young clerk jumped up. "Our family has more than ten kinds! Even if they are not all, I can go to other places to buy! Mr. Master, sit down, and I will run around and collect them all for you! How many of each kind do you want?"

One 5 copper coin, one of each of the 20 kinds, is a gold coin.Gretel squeezed his wallet, took out a gold coin with his index finger and thumb, and pushed it onto the counter:
"See how many types you can make up. If there are 20 types, I will buy 5 of each type first, and then I will buy more when I find the one I want."

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

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

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 bats from all over the country.

...the wallet is bleeding profusely.

Gretel endured the pain in his heart, took out half of the gold coins in the wallet, and dismissed the young clerk.Turning around, facing this big basket of grinning, scary-looking things, he sank into his dantian:

"... Aww!"

When will I try to go!
The number of spells I can cast every day is limited!
Although it is necessary to try various experimental materials when doing experiments—for example, when Edison invented the electric light, he tried nearly 1600 kinds of filament materials—but there is a team under him!
And me?

It's up to me to try it myself!

I want an assistant!assistant!
"Grete, don't worry, let's try slowly." His only assistant, Bernard the Barbarian, came over to comfort him, with a considerate expression on his face:

"Anyway, I can't eat ten rabbits a day..."

　Thanks @山关 for tipping 500 starting coins

　　Thank you for the 100 starting coins rewarded by @汁里里惊惊

　　Congratulations to everyone who has collected another [-] rewards~~~ This is a new addition
　　
　
(End of this chapter)