Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


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

When did the first world exhibition take place? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article Comments on the article

Did you know?

When did the first world exhibition take place?

Fairs have long been one of the most popular ways to sell and buy goods. On the other hand, exhibitions served other purposes. They were intended to show the achievements of the industry and art of a particular country or several countries over a certain period.

The first exhibition, or "world's fair", was the Industrial Exhibition in Hyde Park, London, in 1851. The entire exposition was housed in one building, in the Crystal Palace. This building resembled a giant greenhouse and was built of metal and glass. It was destroyed by fire in 1936. The first international exhibition in America was held in New York in 1853. Although more than 5000 people took part in it, half of whom came from 23 countries, this exhibition was not a success.

The first major exhibition in the United States was organized in 1876 in Philadelphia, Pennsylvania, to commemorate the centenary of the signing of the Declaration of Independence. Here, for the first time, thousands of people were able to get acquainted with products and manufacturers from all over the country. For the first time at this exhibition, Alexander Graham Bell demonstrated to the public the telephone he invented.

Other notable exhibitions include the 1951 Festival of Britain, organized to commemorate the centenary of the 1851 exhibition, and the hugely successful Expo 67 held in Canada.

Author: Likum A.

 Random interesting fact from the Great Encyclopedia:

Is there a difference between bison and bison?

It will probably be difficult to convince anyone that the bison on the United States nickel is not a bison at all. Nevertheless, it is so. The so-called American bison is not a bison at all, but a bison. However, it belongs to the family of wild bulls, and they are so close relatives with real bison that they are very similar to each other in proportions and the presence of 14, not 13 pairs of ribs.

The American bison has huge shoulders and shaggy hair that covers the head and front of the body. Compared to the head and front, the rest of the body looks almost naked. Males are usually much larger than females. A bull can weigh up to 900 kilograms. For the Plains Indians, the American bison is food, clothing, and a roof over their heads.

Bison gives excellent meat, which the Indians eat not only fresh, but also dried. The skins are used to make winter clothes, teepee, horse harness, shields and boat coverings. Even bones, tendons and horns are used. The buffalo narrowly escaped complete extermination as a result of a beating that lasted a little less than 20 years. Once upon a time, the areas between the Alleghenies and the Rocky Mountains were inhabited by huge herds of bison. But by 1800 there were almost no bison left east of the Mississippi. The plains of the West, however, were still black with thousands, if not millions, of bison.

The size of these herds was almost unbelievable. They covered the prairie to the horizon. Steamboats on the rivers sometimes stopped because of the bison crossing from coast to coast, and trains had to wait for hours until the armies of these animals crossed the railway. Entire herds were slaughtered by hunters to feed thousands of new railroad builders, and hundreds of thousands of buffalo were killed for their skins alone.

From 1865 to 1875, approximately 2 buffalo skins were sold each year for approximately $000 each. By 000, there were only 1 bison across North America, 1889 of which were in captivity! There are currently approximately 835 bison living in the US and Canada.

 Test your knowledge! Did you know...

▪ Why does the whale have a fountain?

▪ What do we breathe?

▪ How were Dostoevsky's real walks around St. Petersburg reflected in the novel Crime and Punishment?

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

XNUMXD graphene transistors 06.02.2013

American physicists have taken a big step towards two-dimensional graphene electronics, having learned to apply an insulator layer to arbitrary sections of a sheet of "Nobel" carbon, which allowed them to make ultra-thin transistors from graphene, according to an article published in the journal Nature Nanotechnology.

Since the discovery of graphene in 2004 by Russian-British physicists Andrei Geim and Konstantin Novoselov, scientists have been trying to adapt this material to create electronics. Similar problems - high leakage currents, difficulties in working with graphene and problems in applying an insulator substrate prevent physicists from creating transistors adapted for industrial production.

A group of scientists led by Pulickel Ajayan of Rice University in Houston (USA) solved the latter problem by learning how to draw arbitrary "patterns" from the insulator on sheets of graphene using a laser. According to the technology of Ajayan and his colleagues, the substrate is made first. To do this, scientists spray molecules of an insulator, boron nitride, onto a thin metal plate, and apply a special polymer to some parts of this “sandwich”. Then the physicists "cut out" the polymer-free areas of the substrate with a laser, remove the protective layer and grow a layer of graphene directly on it.

As the researchers note, this design has all the necessary properties for its transformation into a transistor. As a demonstration, scientists have made several "flat" transistors with a size of 100 nm, which are not inferior to silicon counterparts. In addition, Ajayan and his colleagues note that their technology is compatible with modern methods of microelectronics production, which will allow it to be used to create microchips in the near future.

Other interesting news:

▪ vegetable mine detector

▪ Acer ConceptD 7 SpatialLabs Edition XNUMXD laptop

▪ Single EU Cell Phone Charger

▪ Laser holograms will improve the quality of industrial XNUMXD printing

▪ Cows are divided into optimists and pessimists

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Home workshop. Article selection

▪ article Thus Spoke Zarathustra. Popular expression

▪ article What was the original meaning of the word idiot among the ancient Greeks? Detailed answer

▪ Omega article. Legends, cultivation, methods of application

▪ article Two light beacons. Encyclopedia of radio electronics and electrical engineering

▪ article Protection of the electric motor from open-phase mode. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024