People of what professions used earwax in their work several centuries ago? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

People of what professions used earwax in their work several centuries ago? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

People of what professions used earwax in their work several centuries ago?

Ear wax in former times was widely used in the economy. Medieval scribes extracted pigments from it to illustrate books. Before waxed threads were widely available, seamstresses smeared ear wax on the ends of the threads to keep them from fraying. An 1832 book for American Housewives recommended earwax as the best remedy for alleviating the pain of a stab wound from a nail or skewer.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How many feelings does a person have?

At least nine.

Five - those that we all know, that is, sight, hearing, taste, smell and touch - were first listed by Aristotle, who, being an outstanding scientist, nevertheless often got into a mess. (For example, according to Aristotle, we think with the help of the heart, bees come from decaying bull carcasses, and flies have only four legs.)

The conventional wisdom is that humans have four other senses.

1. Thermoception - the feeling of warmth (or lack thereof) on our skin.

2. Equibrioception - a sense of balance, which is determined by the fluid-containing cavities in our inner ear.

3. Nociception - the perception of pain by the skin, joints and organs of the body. Strangely, this does not include the brain, which has no pain-sensing receptors at all. Headaches - no matter what we think - do not come from within the brain.

4. Proprioception - or "body awareness". It is an understanding of where the parts of our body are, even we do not feel or see them. Try closing your eyes and swinging your leg in the air. You will still know where your foot is in relation to the rest of your body.

Every self-respecting neurologist has his own opinion about whether there are any other feelings besides these nine. And some are even convinced that there are at least twenty-one of them. Say, what about feeling hungry? Or thirst? Feelings of depth? Feelings of meaning? language? Or an endlessly intriguing synesthesia, where feelings collide and intertwine so that the music begins to be perceived in color?

What about the feeling of electricity? Or feelings of danger - when the hair stands on end?

In addition, there are senses that some animals have but humans do not. Sharks, for example, have strong electroception, which allows them to feel electric fields; magnetoception detects magnetic fields and is used in the navigation systems of birds and insects; echolocation and "lateral line" are practiced by fish for orientation, and infrared vision is necessary for deer and owls for night hunting or foraging.

Test your knowledge! Did you know...

▪ How much would the ocean level rise if the glaciers of Antarctica and Greenland melted?

▪ Which country produces the most watches?

▪ What taste and nutritional properties do white eggs differ from brown ones?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Junk mail is expensive 10.01.2004

"Junk" emails, better known as "spam", are not so harmless. as it might seem at first glance. According to a survey conducted by Basex, a New York-based company, the total loss of the American economy from spam this year amounted to at least $20 billion.

In large companies, the fight against unsolicited e-mail costs, on average, 600...1000 USD per year per user. It is these funds that go to the salaries of IT specialists, maintaining mail filters, paying for "extra" traffic, clearing user mailboxes and other actions related to spam protection.

It must be assumed that the indicated amount does not include the loss of working time of those unfortunates who, after all these tricks, find "junk" mail in their working mailboxes.

Other interesting news:

▪ The flu first appears on the Internet

▪ A new protein that controls the red color of strawberries identified

▪ New V9 series micro switch

▪ Artificial muscle made of crystalline plastic

▪ Minimizing the harm from sleep deprivation

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site RF power amplifiers. Article selection

▪ article Folding table. Tips for the home master

▪ article What unconsciously provokes people to violate the established rules of behavior? Detailed answer

▪ article Working on a vertical hydraulic press for pressing paper waste. Standard instruction on labor protection

▪ article Simple photorelay. Encyclopedia of radio electronics and electrical engineering

▪ article Illumination for the switch. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews