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  • Inventors of the Age
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A painting shows the Electrical Building at the Chicago World’s Fair. The building, set on a waterway through which small boats and gondolas glide, is brightly illuminated against a backdrop of the night sky.
The Electrical Building, constructed in 1892 for the World’s Columbian Exposition, included displays from General Electric and Westinghouse, and introduced the American public to alternating current and neon lights. The Chicago World’s Fair, as the universal exposition was more commonly known, featured architecture, inventions, and design, serving as both a showcase for and an influence on the country’s optimism about the Industrial Age.

“The electric age was ushered into being in this last decade of the nineteenth century today when President Cleveland, by pressing a button, started the mighty machinery, rushing waters and revolving wheels in the World’s Columbian exhibition.” With this announcement about the official start of the Chicago World’s Fair in 1893 ( [link] ), the Salt Lake City Herald captured the excitement and optimism of the machine age. “In the previous expositions,” the editorial continued, “the possibilities of electricity had been limited to the mere starting of the engines in the machinery hall, but in this it made thousands of servants do its bidding . . . the magic of electricity did the duty of the hour.”

The fair, which commemorated the four hundredth anniversary of Columbus’s journey to America, was a potent symbol of the myriad inventions that changed American life and contributed to the significant economic growth of the era, as well as the new wave of industrialization that swept the country. While businessmen capitalized upon such technological innovations, the new industrial working class faced enormous challenges. Ironically, as the World’s Fair welcomed its first visitors, the nation was spiraling downward into the worst depression of the century. Subsequent frustrations among working-class Americans laid the groundwork for the country’s first significant labor movement.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, U.s. history. OpenStax CNX. Jan 12, 2015 Download for free at http://legacy.cnx.org/content/col11740/1.3
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