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Intracity transportation

As cities grew and sprawled outward, a major challenge was efficient travel within the city—from home to factories or shops, and then back again. Most transportation infrastructure was used to connect cities to each other, typically by rail or canal. Prior to the 1880s, the most common form of transportation within cities was the omnibus. This was a large, horse-drawn carriage, often placed on iron or steel tracks to provide a smoother ride. While omnibuses worked adequately in smaller, less congested cities, they were not equipped to handle the larger crowds that developed at the close of the century. The horses had to stop and rest, and horse manure became an ongoing problem.

In 1887, Frank Sprague invented the electric trolley, which worked along the same concept as the omnibus, with a large wagon on tracks, but was powered by electricity rather than horses. The electric trolley could run throughout the day and night, like the factories and the workers who fueled them. But it also modernized less important industrial centers, such as the southern city of Richmond, Virginia. As early as 1873, San Francisco engineers adopted pulley technology from the mining industry to introduce cable cars and turn the city’s steep hills into elegant middle-class communities. However, as crowds continued to grow in the largest cities, such as Chicago and New York, trolleys were unable to move efficiently through the crowds of pedestrians ( [link] ). To avoid this challenge, city planners elevated the trolley lines above the streets, creating elevated trains, or L-trains, as early as 1868 in New York City, and quickly spreading to Boston in 1887 and Chicago in 1892. Finally, as skyscrapers began to dominate the air, transportation evolved one step further to move underground as subways. Boston’s subway system began operating in 1897, and was quickly followed by New York and other cities.

Illustration (a) depicts a trolley accident: A man is sprawled in the tracks before a stopped trolley, with several other men coming to his aid while a crowd looks on. Photograph (b) shows three trolleys emerging from an underground tunnel in Boston.
Although trolleys were far more efficient than horse-drawn carriages, populous cities such as New York experienced frequent accidents, as depicted in this 1895 illustration from Leslie’s Weekly (a). To avoid overcrowded streets, trolleys soon went underground, as at the Public Gardens Portal in Boston (b), where three different lines met to enter the Tremont Street Subway, the oldest subway tunnel in the United States, opening on September 1, 1897.

The rise of skyscrapers

The last limitation that large cities had to overcome was the ever-increasing need for space. Eastern cities, unlike their midwestern counterparts, could not continue to grow outward, as the land surrounding them was already settled. Geographic limitations such as rivers or the coast also hampered sprawl. And in all cities, citizens needed to be close enough to urban centers to conveniently access work, shops, and other core institutions of urban life. The increasing cost of real estate made upward growth attractive, and so did the prestige that towering buildings carried for the businesses that occupied them. Workers completed the first skyscraper in Chicago, the ten-story Home Insurance Building, in 1885 ( [link] ). Although engineers had the capability to go higher, thanks to new steel construction techniques, they required another vital invention in order to make taller buildings viable: the elevator. In 1889, the Otis Elevator Company, led by inventor James Otis, installed the first electric elevator. This began the skyscraper craze, allowing developers in eastern cities to build and market prestigious real estate in the hearts of crowded eastern metropoles.

Questions & Answers

Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
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omeprazole
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Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
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Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
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Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
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Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
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Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
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Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
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Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
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anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
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how does Lysin attack pathogens
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acid
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I information on anatomy position and digestive system and there enzyme
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anatomy of the female external genitalia
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Organ Systems Of The Human Body (Continued) Organ Systems Of The Human Body (Continued)
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what's lochia albra
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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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