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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

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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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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