Around a lot of things that we see every day, but do not even guess what they are created for.
An article in which several such "secrets" is revealed. I am pleased to share with you!
Why do you need a loop on the back of a shirt
On this issue there are three plausible versions. The first is the most obvious - this loop is designed to hang a shirt on the hook and it did not remember. The second version came to us since the time of removable collars and cervical headscarves: perhaps this loop was created for fastening a tie. And the third version, the most romantic. A student who studied at the American University, when he started to meet with a girl, cut off this loop as a sign that he was busy. And the girl, in turn, was supposed to wear his college scarf.
Why do you need a cylinder on the cord from charging a laptop
You exactly noticed this thickening on the wiring of a laptop or a camera. This is a simple, but very important device is called a "ferrite filter". It removes possible interference from the feed cable. The design of this filter to the impossibility is simple: inside the cylinder are insertion from ferrite, which the wire envelopes the ring.
Why do you need a hole in the airplane porthole
The porthole consists of two plastic glasses. There are a large pressure difference between the air layer between the glasses and the interior "glass" can burst. This small hole is created just to normalize the pressure. Through it, the air is removed from the interconnect space or, on the contrary, seeps out of the cabin.
What is the blue part of the lasty
Ask any person: "Why do I need a blue part of the lasty," and he will answer you with confidence that in order to erase the handle. But it is not so. Initially, the blue part was intended to wash the inscriptions and drawings made on a dense paper. The red part of the lasty will leave a divorce, but blue will cope with it perfectly. Subsequently, manufacturers understood that the blue part is not used for its intended purpose, and made a marketing stroke from this. On some eraser on the blue part, they even began to portray the handle.
Why the upper and lower loops on the shirt are arranged horizontally
Another "shirt" question, but there is no romance. The fact is that in these places the most likely the likelihood that the button will unbutton. In the horizontal loop, the pressure accounts for an angle and the chance that the button will slip out of the hole, decreases.
Why in sneakers additional holes
For these additional holes in sneakers, few people pay attention, and in vain, because they are very useful. These holes are designed to make the leg more tightly and do not rub the stop during sports.
What is the hole in the spoon for spaghetti
It is brilliant why I did not know this before! A hole in spoonful for spahetti is made in order to measure the amount of dry macaron for cooking a standard portion. It is clear that someone eats a little, and someone loves pasta very much and is ready to eat all the package, but for those who have a "average" and who is always lost how much sleep spaghetti is a hole, the present salvation.
Why do you need a little pocket on jeans
The most popular answer is to wear condoms. Of course, in this pocket you can put anything, including the means of contraception, but initially it was created not for this. For the first time, the fifth pocket appeared in 1873 on Levi's jeans and was intended for pocket watches. Until now, in the catalogs of this company, it is called "Watch Pocket".
What do you need a hole in the ballpoint cap
The erroneous opinion is widespread that this hole is made so that the air goes into the lungs if the cap is stuck in the trachea. But it is not so. If it is suppressed by such a cap (and something else), the mucous will begin to swell. This small hole is created to prevent the cap absorption into the mucous membrane.
What is needed by the flaps of the fabric, which is attached to new clothes
Imagine not for patchwork! It turns out that manufacturers apply this flaps so that we can wash it with a powder or bleach and check how the fabric reacts. My life will not be the same!