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Safety-valve organizations can exist in politics, where they provide an outlet for those dissatisfied with the political and social situation to legally organize and discuss it. For example, Saugat K. Biswas notes that the Indian National Congress was such an organization in late 19th-century India. [ 15 ]
The safety valve theory was an American theory of economic development that held the availability of free land and continued expansion westwards into the American frontier contributed to American development, explained the lack of labor movements in the United States, and promoted democracy, economic equality and individualism. [1]
In the late 19th and early 20th century, the inspection records of various sources in the U.S., UK, and Europe showed that the most frequent cause of boiler explosions was weakening of boilers through simple rusting, by anywhere from two to five times more than all other causes.
As a musical movement, nationalism emerged early in the 19th century in connection with political independence movements, and was characterized by an emphasis on national musical elements such as the use of folk songs, folk dances or rhythms, or on the adoption of nationalist subjects for operas, symphonic poems, or other forms of music. [1]
The natural horn is a musical instrument that is the predecessor to the modern-day (French) horn (differentiated by its lack of valves). Throughout the seventeenth and eighteenth centuries, the natural horn evolved as a separation from the trumpet by widening the bell and lengthening the tubes. [1]
The instrument was standard in French mid-19th century serious operas by Meyerbeer, Halevy, and Auber, as well as English operas by Michael Balfe, Vincent Wallace, and others. Italian opera composer Giuseppe Verdi scored for either serpentone or cimbasso in his early operas, but parts were often played on the ophicleide until the appearance of ...
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A variation of the Tyler's "diffusion" theory, it played on economic fears in a period when slave-based staple crop markets had not yet recovered from the Panic of 1837. The Texas "escape route" conceived by Walker promised to increase demand for slaves in fertile cotton-growing regions of Texas, as well as the monetary value of slaves.