In 1892 the Sierra Club was formed. In 1908 an area of coastal redwood trees north of San Francisco was established as Muir Woods National Monument. In the Sierra Nevada mountains, a walking trail from Yosemite Valley to Mount Whitney was dedicated in 1938. It is called John Muir Trail. John Muir was born in 1838 in Scotland. His family name means "moor," which is a meadow full of flowers and animals. John loved nature from the time he was small. He also liked to climb rocky cliffs and walls. When John was eleven, his family moved to the United States and settled in Wisconsin. John was good with tools and soon became an inventor. He first invented a model of a sawmill. Later he invented an alarm clock that would cause the sleeping person to be tipped out of bed when the timer sounded. Muir left home at an early age. He took a thousand-mile walk south to the Gulf of Mexico in 1867and 1868. Then he sailed for San Francisco. The city was too noisy and crowded for Muir, so he headed inland for the Sierra Nevadas. When Muir discovered the Yosemite Valley in the Sierra Nevadas, it was as if he had come home. He loved the mountains, the wildlife, and the trees. He climbed the mountains and even climbed trees during thunderstorms in order to get closer to the wind. He put forth the theory in the late 1860's that the Yosemite Valley had been formed through the action of glaciers. People ridiculed him. Not until 1930 was Muir's theory proven correct. Muir began to write articles about the Yosemite Valley to tell readers about its beauty. His writing also warned people that Yosemite was in danger from timber mining and sheep ranching interests. In 1901 Theodore Roosevelt became president of the United States. He was interested in conservation. Muir took the president through Yosemite, and Roosevelt helped get legislation passed to create Yosemite National Park in 1906. Although Muir won many conservation battles, he lost a major one. He fought to save the Hetch Valley, which people wanted to dam in order to provide water for San Francisco. In the late 1913 a bill was signed to dam the valley. Muir died in 1914. Some people say losing the fight to protect the valley killed Muir. What happened first?
The origin of the attempt to distinguish early from modern music and to establish the canons of performance practice for each lies in the eighteenth century. In the first half of that century, when Telemann and Bach ran the collegium musicum in Leipzig, Germany, they performed their own and other modern music. In the German universities of the early twentieth century, however, the reconstituted collegium musicum devoted itself to performing music from the centuries before the beginning of the "standard repertory," by which was understood music from before the time of Bach and Handel. Alongside this modern collegium musicum, German musicologists developed the historical sub-discipline known as "performance practice," which included the deciphering of obsolete musical notation and its transcription into modern notation, the study of obsolete instruments, and the re-establishment of lost oral traditions associated with those forgotten repertories. The cutoff date for this study was understood to be around 1750, the year of Bach’s death, since the music of Bach, Handel, Telemann and their contemporaries did call for obsolete instruments and voices and unannotated performing traditions—for instance, the spontaneous realization of vocal and instrumental melodic ornamentation. Furthermore, with a few exceptions, late baroque music had ceased to be performed for nearly a century, and the orally transmitted performing traditions associated with it were forgotten as a result. In contrast, the notation in the music of Haydn and IV|ozart from the second half of the eighteenth century was more complete than in the earlier styles, and the instruments seemed familiar, so no "speciaI" knowledge appeared necessary. Also, the music of Haydn and Mozart, having never ceased to be performed, had maintained some kind of oral tradition of performance practice. Beginning around 1960, however, early-music performers began to encroach upon the music of Haydn, Mozart, and Beethoven. Why? Scholars studying performance practice had discovered that the lMng oral traditions associated with the Viennese classics frequently could not be traced to the eighteenth century and that there were nearly as many performance mysteries to solve for music after 1750 as for earlier repertories. Furthermore, more and more young singers and instrumentalists became attracted to early music, and as many of them graduated from student- amateur to professional status, the technical level of early-music performances took a giant leap forward. As professional early-music groups, building on these developments, expanded their repertories to include later music, the mainstream protested vehemently. The differences between the two camps extended beyond the question of which instruments to use to the more critical matter of style and delivery. At the heart of their disagreement is whether historical knowledge about performing traditions is a prerequisite for proper interpretation of music or whether it merely creates an obstacle to inspired musical tradition. It can be inferred from the passage that the "standard repertory" mentioned in line 15 might have included music that was written
The amount of bone in the elderly ske|eton—a key determinant in its susceptibility to fractures-is believed to be a function of two major factors. The first is the peak amount of bone mass attained, determined to a large extent by genetic inheritance. The marked effect of gender is obvious: Elderly men experience only one-half as many hip fractures per capita as elderly women. But also, African- American women have a lower incidence of osteoporotic fractures than Caucasian women. Other important variables include diet, exposure to sunlight, and physical actMty. The second major factor is the rate of bone loss after peak bone mass has been attained. While many of the variables that affect peak bone mass also affect rates of bone loss, additional factors influencing bone loss include physiological stresses such as pregnancy and lactation. It is hormonal status, however, refilected primarily by estrogen and progesterone levels, that may exert the greatest effect on rates of decline in skeletal mass. It can be inferred from the passage that the peak amount of bone mass in women
SaIinger’s Catcher in the Rye, having become a manifesto for psychopaths and potential miscreants, is viewed by many high-school administrators as too to be suitable for teenage students.