With black bread and cups of water, they went outside on the grass and ate an unpalatable dinner while taking advantage of the last rays of the sunset.

The town center in this residential area is a little bit of a road, it seems relatively quiet, and the surrounding houses are also relatively far away, the nearest is the one rented by Mado, and at a glance, only the town is populated under the hillside in the distance.

Compared to the increasingly lively scene in the town, Jiayi and their place are like two worlds.

Secluded, almost resentful.

Trudy took a sonar detector and came to Jiayi's side: "Is this the sonar detector you are going to sell?

Kaichi let go of the bread and water cup in his hand, grabbed it with his tentacles, and reached out to take the sonar detector in Trudy's hand. Jill on the side looked at Jiayi, his expression was a little strange, and he stopped talking, but his current image was a little strange - holding a large disc in his hand, the mage's touch looked like a piece of bread and a glass of water floating around him because it had no color, which made people feel very discordant.

Although most young mages are not so old-fashioned and often use spells to do some convenient things, it is very rare for someone like Kaichi to use spells so frequently in his life. If it is an ordinary mage, he has to free his hand when he holds something in his hand, most of them are put aside or handed to others, and there are few people like Jia Yi who let his magic tentacles hold it.

Yancy came over and patted Jill on the shoulder: "Just get used to it." ”

They are no longer surprised by Jiayi's behavior, just like he said, just get used to it. And now even he thinks that magic is indeed very convenient to use like this.

The new sonar detector is similar to the original, a plate-sized disc with two concentric circles on the surface and an inner ring that can be flipped up like a flip cover. At the front end is a bat-like beast head with a mouth wide open and appears to be screaming. This head is only meant to indicate direction and has no practical effect.

Speaking of which, this thing is very similar to the old CD Walkman.

Jia Yi lifted the lid of the inner circle backwards, revealing complex runes inside, these runes are not all useful, many are to confuse the role of the real magic circle runes, used to increase the difficulty of cracking, although this does not prevent the magic circle from being cracked, but it raises the threshold for cracking, and it will not allow ordinary mages to easily crack it.

The inside of the lifted lid is slightly concave, there is a bulge in the middle, this bulge is used to release ultrasonic waves, the back of the concave lid is used to receive sound, and the chassis below is used to store magic, transmit magic, and develop.

Perhaps because of the influence of Jiayi's previous life, this sonar detector doesn't look like a magic product, but like a technological product, with some simple aesthetics.

Jia Yi pointed the array disk to the distant woods, and injected magic power into the detector, and a sound wave that was invisible to the naked eye and inaudible to the naked ear spread out one after another, and soon, the image of the distant woods was displayed on the array disk, and it was not easy to say, but it seemed to be close at hand.

Seeing Jiayi's demonstration, the rest of the people also gathered around, Jill looked at the image in the array, and said: "There are so many trees here, the content inside is not clear, is the detection effect much weaker." ”

Jia Yi stretched out his hand and pointed to the trees on the array, only to see that the number of trees had disappeared a lot, the gap had become larger, and the inside of the forest had become clearer.

"That's fine, you can specify a substance to be eliminated in the array display, such as trees, because each substance will reflect different sound waves, and you can filter out this type of wave. And if something moves quickly, it's easier to see on top of the array. ”

In fact, Jiayi said to filter out a type of wave, the effect is not as good as imagined, for example, Jiayi specified to filter trees, but can only filter coarse trunks, leaves and fine branches are not filtered out, this is to avoid filtering out the danger, the scope of filtration has been narrowed, in fact, because the progress of the detector is not enough.

Although the magic array is magical, there is still a big gap between it and modern machinery in terms of fine operation.

Jiayi detector is still the best in complex terrain, because there is no need to be afraid of blocking the line of sight, although it looks very careful, otherwise too many lines together will not be easy to distinguish, but now it has an underwater use, which can be regarded as expanding the market.

With this new toy, Trudy and the others were interested, and the two of them had no one and began to probe around. When they were helping Kaichi with bread in the underground lab, they had actually seen the sonar detector being made, but they couldn't tell what it was because it hadn't been made yet.

And it's also a bit taboo to rush to check the spell props that other mages are making, in case there is something that needs to be kept secret, so I didn't go over to look at it carefully.

In fact, there is another disadvantage of ultrasonic detection, that is, the wavelength is too short, it cannot bypass some large obstacles, and the detection range is relatively narrow, but these do not affect the use at present.

Infrasound is highly lethal and not easily known, making it unsuitable for detection. In fact, this array disk of Jiayi can be transformed into an infrasonic transmitter, but Jiayi did not open this function, and it was not advertised like anyone.

While infrasound is no secret among mages, there are no mages who open up infrasound-based spells.

Jiayi also didn't have the idea of transforming the detector into a weapon, and the occasional use of infrasound waves for raids might have miraculous effects, but if you use it too much, it is also very simple to prevent, whether it is sound absorption or sound insulation, it is very simple.

After dinner, Kaichi and the others went to the underground laboratory again.

The rusks had been completely soaked and had become a slimy heap.

March looked at these things with some disgust: "This, is there really no problem?"

Such a big puddle of stuff does look a little disgusting, and Jiayi himself feels a little uncertain, but it hasn't reached the final fermentation step yet, and the result shouldn't be too bad... Bar...

Jia began to cast a spell to heat the bucket of bread, and after feeling 4 or 50 degrees, it stopped, and in order to ensure the effect, a temporary circle was drawn on the ground to keep the bread in the bucket warm.

Is that good, Trudy is a little incredulous on the side, it won't be so easy, right?

He looked at Kaichi suspiciously, Kaichi clapped his hands, and finally added some gray-brown powder to the bread mixture, and said, "Wait for a while, and then seal it up for fermentation." ”

The gray-brown thing added by Jiayi is a substance extracted from malt and contains a large amount of starch invertase, which is specially used to process the raw materials before brewing, which can hydrolyze the starch into maltose, so that the conversion efficiency of brewing is higher and the flavor is better, especially when brewing ale.

In his previous life, when the winter was approaching the New Year, the family would make their own syrup, and at that time, Jiayi was very curious, why can malt be turned into maltose by boiling?

At that time, the maltose was boiled at night, in a large pot, and the pot was first heated over low heat under the stove, and the sprouted wheat was in the pot, and it was slowly heated over low heat. There will be white foam coming out slowly on the side of the pot, these are reluctant to throw away, his mother will scoop out these white foam, let Jia Yi drink it himself, sweet, faint.

Jia Yi has never seen the maltose officially out of the pot, when he hasn't slept yet, the pot is only malt, at most the boiled water is a little sweet, and when Jia Yi comes the next day, the maltose has already come out of the pot, and it has become a syrup. In order to boil the maltose, you need to control the temperature, the temperature should not be too high, and the time will last until late at night, when Jia Yi was still young and couldn't stay up late, so he never officially saw the maltose really boiled.

Later, when I got older and the conditions at home became better, I never made syrup at home again.

Suddenly remembering the things of his previous life, Jia Yi felt a little trance, it has been more than 10 years since he traveled, and some things were slowly left behind, and they seemed to be forgotten, but suddenly they were flooded, but they were like fermented old wine, and they seemed to have spoiled into vinegar, and they rushed straight to his mind.

He suddenly felt a little guilty, and suddenly crossed over, not knowing if there was a great god who would help him deal with the aftermath, and he didn't know what kind of blow his parents would suffer if they suddenly lost a son.

Jia Yi can't know, and he doesn't even dare to think about it, no wonder when he read novels by himself in his previous life, the protagonists were usually both parents died, and he could only hope that the "great god" that caused him to cross was strong enough to erase the traces of his own existence, so that the parents in his previous life felt that they only had one child.