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Image (a) is a photograph of three prospectors kneeling beside a stream and panning for gold. Image (b) is a photograph of a two laborers engaged in hydraulic mining, with a massive expanse of rock spread out before them.
The first gold prospectors in the 1850s and 1860s worked with easily portable tools that allowed anyone to follow their dream and strike it rich (a). It didn’t take long for the most accessible minerals to be stripped, making way for large mining operations, including hydraulic mining, where high-pressure water jets removed sediment and rocks (b).

By the 1860s and 1870s, however, individual efforts to locate precious metals were less successful. The lowest-hanging fruit had been picked, and now it required investment capital and machinery to dig mine shafts that could reach remaining ore. With a much larger investment, miners needed a larger strike to be successful. This shift led to larger businesses underwriting mining operations, which eventually led to the development of greater urban stability and infrastructure. Denver, Colorado, was one of several cities that became permanent settlements, as businesses sought a stable environment to use as a base for their mining ventures.

For miners who had not yet struck it rich, this development was not a good one. They were now paid a daily or weekly wage to work underground in very dangerous conditions. They worked in shafts where the temperature could rise to above one hundred degrees Fahrenheit, and where poor ventilation might lead to long-term lung disease. They coped with shaft fires, dynamite explosions, and frequent cave-ins. By some historical accounts, close to eight thousand miners died on the frontier during this period, with over three times that number suffering crippling injuries. Some miners organized into unions and led strikes for better conditions, but these efforts were usually crushed by state militias.

Eventually, as the ore dried up, most mining towns turned into ghost towns. Even today, a visit through the American West shows old saloons and storefronts, abandoned as the residents moved on to their next shot at riches. The true lasting impact of the early mining efforts was the resulting desire of the U.S. government to bring law and order to the “Wild West” in order to more efficiently extract natural resources and encourage stable growth in the region. As more Americans moved to the region to seek permanent settlement, as opposed to brief speculative ventures, they also sought the safety and support that government order could bring. Nevada was admitted to the Union as a state in 1864, with Colorado following in 1876, then North Dakota, South Dakota, Montana, and Washington in 1889; and Idaho and Wyoming in 1890.

The cattle kingdom

While the cattle industry lacked the romance of the Gold Rush, the role it played in western expansion should not be underestimated. For centuries, wild cattle roamed the Spanish borderlands. At the end of the Civil War, as many as five million longhorn steers could be found along the Texas frontier, yet few settlers had capitalized on the opportunity to claim them, due to the difficulty of transporting them to eastern markets. The completion of the first transcontinental railroad and subsequent railroad lines changed the game dramatically. Cattle ranchers and eastern businessmen realized that it was profitable to round up the wild steers and transport them by rail to be sold in the East for as much as thirty to fifty dollars per head. These ranchers and businessmen began the rampant speculation in the cattle industry that made, and lost, many fortunes.

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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