Lin Feng explained: "Language is the abbreviation of language, literature, and culture, which involves a wide range of topics, including a small part of the Analects. Pen? Interesting? Pavilion wWw. ｂiquge。 info physics, everything makes sense, such as why water flows from high to low, why there are clouds, and so on. Chemistry, you just need to be a Taoist alchemist. ”

Li Er was stunned: "Life is short for decades, how can such mixed knowledge be mastered?" ”

"Who said no, look at me, I can't write or write, I can't do martial arts, I can't do anything, I can't find a child on the street, I'm better than me, I can be slapped away by Su Guogong." Lin Feng said aggrievedly.

Cheng bit Jin Yangyang was complacent: "I see that your kid is pleasing to the eye, if you don't worship me as a teacher, I will teach you my seventy-seventy-thirty-six unique learning!" ”

Li Er interrupted: "Zhijie shut up, that's seven seven forty-nine, don't learn and have no skills." ”

The multiplication formula has been there for a long time, at least in the Spring and Autumn Period and the Warring States Period, such as "Xunzi", "Guanzi", "Huainanzi", "Warring States Policy" and other books have been used, but they are not invented in modern times.

Cheng Biting Jin was thick-skinned, when he didn't hear it, he picked up the wine bottle and wanted to pour himself wine, but this time he found that it was gone, and looked at Lin Feng with straight eyes: "Lao Cheng hasn't drunk it, let's have another bottle." ”

"You think you've won the lottery, it's gone, it's just this bottle." Lin Feng rolled his eyes before he didn't wait.

Li Er is a little interested in chemistry, mainly because Lin Feng said that it is similar to Taoist alchemy, Li Er knows the old Taoist Yuan Tiangang, this old Taoist also served as Li Yuan's military advisor, and served as a county commander after Tang Dingtianxia.

There is also a disciple of Yuan Tiangang, Li Chunfeng, who served as a general in the Taishi Bureau, but these two Taoist priests did not learn Dan Dao, Yuan Tiangang dabbled more, astronomy, astronomy, prediction, feng shui, divination, and physiognomy, Li Chunfeng mainly studied astronomy, calendar, and arithmetic.

These two masters and apprentices cooperated to make a whole push back diagram, a total of 60 hexagrams, from the Tang Dynasty to the future, and they are extremely accurate, at least more than 40 hexagrams have been confirmed by history.

"Then you know how to do alchemy?"

"No, but I'll do something else." Lin Feng said and took out a lighter, just before the wine in his cup was finished, he lit the lighter and burned it to the wine glass.

Seeing the wine in the cup on fire, the souls of Li Er, Fang Xuanling, and Cheng Biting Jin flew out of the sky, and they reached out to snap their tongues and want to spit out the wine.

"Don't panic, this wine is fine, didn't you see that I drank it too." Lin Feng stopped the three of them: "There is alcohol in this wine, and it can be burned when it is lit on fire, and it is okay to drink it in your stomach." ”

"This is chemistry?" Li Er was shocked, for fear that his stomach would catch fire.

"Yes, alcohol burning is a chemical change, so I'll show you another one." Lin Feng walked out as he spoke, and came back with two large glasses and an egg after a while.

There was water in both cups, and Lin Feng said: "These are two cups of water, and eggs will sink to the bottom of the water when they are put in the water." With that, he put the egg in a cup, and the egg sank to the bottom of the cup.

The three of them looked at Lin Feng blankly, we all know this, what do you want to show us?

Lin Feng took the egg out of the cup with a big spoon and said, "Now I can make the egg float on the water." With that, put the eggs in another cup.

At this time, the egg sank a little and floated, Li Er leaned his head to the side of the cup, poked the egg with his hand, and the egg sank again and continued to float.

"What is the reason, why don't the eggs sink?" Fang Xuanling took the initiative to help Li Er ask questions.

"Hehe, because this is a cup of salt water, the salt water density is greater than that of eggs, so eggs can float, I don't believe you can take chopsticks and taste it." Lin Feng said ill-intentionedly.

Cheng Yanjin took a chopstick and stretched it out into the cup, and then put it in his mouth and smashed it: "Bah, bah, bah...... Salty to death I'm old. ”

Lin Feng put aside the cup of salt water and said to the cup of pure water: "Now look at this cup of water, do you want to taste it, this is clean water, and he just put the eggs." ”

Cheng Biting Jin had palpitations, the cup of salt water just now was not ordinary salt, this time it won't be pitted again, right? Li Er slammed Cheng Biting Jin with his foot under the table, and motioned for Cheng Biting Jin to taste it.

Cheng Yanjin took a spoon and scooped a spoonful, first touched it with the tip of his tongue, eh, it's normal water, nothing special, just gargle.

Cheng Yanjin thought of this and directly reached out to take the cup and was about to pour it into his mouth, but Lin Feng hurriedly stopped: "Su Guogong, you don't have to drink it all, I'm still useful." ”

"It's not salty in my mouth, I'll rinse my mouth."

"Scoop the soup yourself, or go out and get water, I don't want to run again."

"What else are you going to do with this water, can you make eggs float with this water?" Cheng is unhappy biting Jin, my old Cheng's mouth is salty and can't be opened, and you still don't give saliva to drink.

"Here's the moment to witness the miracle." Lin Feng pretended to be forced and threw something into the cup.

The three of them stared at the cup with their eyes, nothing special, that thing sank to the bottom of the water when it entered the cup, and it didn't float, what a miracle moment, fooling people.

"Hey, it's smoking." Cheng bit the tip of his eyes and watched the smoke slowly come out of the cup.

"Really, is this water going to boil?" Li Er blinked, staring at his eyes a little sour.

"No, it's frozen!" Fang Xuanling watched the water in the cup slowly turn into ice cubes, and shouted in surprise.

Lin Feng shook his head: "That's right, it's icing, how about it, it's fun." ”

Li Er asked suspiciously, "What is in the cup, and why does this water freeze?" ”

You must know that now that winter has passed, the weather is gradually getting warmer, only ice turns into water, how can there be water frozen, I can't figure it out at all.

"Saltpeter, you should know about this thing, those Taoist alchemy will use it, it seems that some medical book also says that this thing can be used in medicine. When saltpeter is placed in the water, it absorbs heat and the water freezes. Lin Feng finished pretending to be forced and explained to the three soil buns.

"Actually, this chemistry is really useful." Li Er looked stunned, and he didn't know if he understood or not.

Lin Feng denied: "This is not chemistry, this belongs to physics, don't get confused." ”

"This ice is probably edible?" Li Er thought a lot, in the future, there will be no need to store ice cubes in the ice cellar in the summer, and directly use saltpeter to make ice, which can save a lot of manpower and material resources.

"Don't, don't look for me if you have something wrong with eating, if you really want to use saltpeter to make ice to eat, you can use a large cup to fill a small cup, fill it with water, put saltpeter in a large cup, and the ice in the small cup can be eaten." Lin Feng decisively taught a trick, but he couldn't let these guys mess around.

"It's a good idea." Li Er nodded, it was much safer this way, and there would be no shortage of ice in the hot summer in the future.

Lin Feng sent the Buddha to the west and gave Li Er an idea to make money: "This method can also make money, get some ice to sell in the summer, and make money from those big families, how good." ”

Fang Xuanling and Cheng gritted their teeth, this bastard, cheating father, our daughter-in-law's family is not a prestigious family, and the family is always rich. (To be continued.) )