Chapter 461 It must be because of Lorenz!
How can you tell this?
Leonardo watched as Bifang took out the second hand from his watch, rubbed it on his hair a few times, put some leaves on it and put it into the water, then pointed to the direction of the stillness and said that was north and south.
What north and south?
What?
[I know, this is Lorentz's theorem! ]
[Speaking of Lorentz's theorem, I slowly typed a question mark]
[Is it magnetization? Have you never been to school? It should be the same as a compass, but it is only temporary.]
"The principle is actually very simple, which is the same principle of the formation of a compass, but one is permanent and the other is temporary." Bifang picked up the leaf in the puddle, drained the water, put the pointer back on it, and fastened the dial.
"Repeatedly rub a piece of wire or a sewing needle against silk or hair in the same direction. I wonder if you ever played the game of rubbing a plastic ruler on your hair and then sucking up scraps of paper when you were in school? It's the same principle. The wire will produce magnetism and can indicate the North Pole when it is hung up. It's similar to putting a magnet bar at the center of the earth, with the magnetic north pole near the geographic south pole and the magnetic south pole near the geographic north pole. The magnetic pole and the geographic pole do not completely coincide, and there is a magnetic declination, but it is enough to distinguish the direction. The magnetism will not be very strong in this way. After a period of time, you need to rub it again to increase its magnetism. If you have a battery with a voltage of 2 volts or more, you can magnetize the metal using electric current. You also need to prepare a small piece of metal wire, and the metal wire should be covered with insulating skin."
[I know the one that sucks up confetti, I play it often, dog head.jpg]
[No way, no way, is there really anyone who has never used plastic paper to absorb paper scraps? ]
[But what if there is no watch? Can't everyone carry a wire? ]
Leonardo also raised the same question: indeed, what if there is no watch? Or an electronic watch?
This approach still has limitations.
He wanted to know a more general and universal method from Bifang.
"Instead of a watch second hand, a thin, flat razor blade can be used to indicate direction, because it is made of two types of metal bonded together. By carefully rubbing the blade against the palm of your hand, you can make it magnetic, and then suspend it to achieve the same effect."
"If you don't have any of these, and you are truly lost and can't get through on the phone, then you can take apart your phone and there will definitely be something inside. I think everyone carries a phone, right? Or a flashlight, any electronic device will do."
Leonardo wanted to ask more, but Bifang stopped him directly: "Forget it, under what circumstances can a person be reduced to having no equipment on him, no plants, no sun, and even no terrain?"
The audience smiled knowingly.
"Besides, sewing needles or paper clips are essential items for outdoor adventures. Don't you have any of them?"
Leonardo scratched his head. "I brought a water bottle, a flashlight, a knife, water purification tablets, and a medical kit. That's all...anything else?"
Bifang was too lazy to say anything. After all, the other party was just an amateur and might have prepared these things based on his feeling. The fact that he had water purification tablets showed that he had a good outdoor awareness.
"Among the basic wilderness survival tools, knives are the most commonly used tools in critical situations."
"In addition, you need a knife, waterproof matches, candles, fishing line, various types of fish hooks, two small baits, wire for making traps, water purification tablets, whistle, rope, paper clips or sewing needles, medical tape, adhesive plaster (Band-Aid), dental floss (tough silk thread), compass, tweezers, paracetamol (painkillers), disinfectant alcohol."
"Put all these things in a small container. This container can also be used as a small kettle to boil water in an emergency. Seal it and keep it dry. Make sure to put the wilderness survival kit in your backpack or clothes pocket before each trip."
[I’ve made a note of it. I’ll place the order right away and keep it in my bag for future use.]
[You don’t think it can be used, do you? ]
[What if I get lost in the forest in the future, dog head.jpg]
[Others go on an expedition with full equipment, ×, Fangshen goes on an expedition with only a pair of shorts, √]
This was the first time that Bifang explained in such detail in front of everyone what to prepare for an adventure, and everyone wrote it all down immediately.
"Basically, I have talked about all the methods of determining directions, except for a few that are of little applicability, such as ant nests that always run north-south. The others are completely sufficient." Bifang did not dwell on this issue too much and continued to move forward.
As he walked, he said, "Having a general direction is not enough. Many times, you may get lost as soon as you turn around, because the surrounding environments are too similar. Therefore, before you move forward for a certain distance, you must first use a certain geographical feature on the road as a marker."
"That is, you have to find a geographical feature on the ground, such as a tree, align this reference with your direction of travel, walk towards it, and then repeat this process over and over again until you reach your destination."
"Are all ant nests oriented north-south?" Leonardo quickly followed and asked in disbelief.
"Yes, this is the structural wisdom of living things. The nests of ants and termites are all 'mounds' or 'thin blade-shaped' structures, and they must be oriented from north to south, with the entrance facing south, so that they can be exposed to the sun in winter and avoid direct sunlight in summer."
Leonardo was shocked: "You know too much !"
“How can you dare to go out and mess around when you don’t know anything? When you know the function and name of every plant, the habits and weaknesses of every animal, the making and use of every tool, the cause and trend of every terrain, you won’t be afraid of the wilderness anymore.”
"Have you reached this level now?"
"Me? I'm still a long way from that."
Bifang crossed the dense woods and stepped onto a rock. The sound of gurgling water suddenly became louder.
A stream no more than two or three meters wide appeared before everyone.
Leonardo's face was filled with joy, and his pale face regained its color, he really found it!
He couldn't wait to get to the stream and scoop up a pool of clear water. The stream here came from nowhere, and after being filtered through rocks and mud, there was no impurities and it was clear and transparent.
However, having learned from his previous experience, Leonardo did not dare to drink it. He took out his kettle, filled it with water, and put two water purification tablets in it.
[Although I have said it many times, I still want to say it now, Fang Shen is awesome! ]
【It’s really cool! 】
Every step is very safe. If you say you are going to find a water source, you will definitely find it.
If you say you can find the direction, you will definitely find it.
How can such a person not give people confidence?
