A smaller number exist only in foreign versions or in lower-quality formats, while five percent are incomplete, according to the report by historian-archivist David Pierce.
"All the features of Buster Keaton, Charles Chaplin and Harold Lloyd, the films Mary Pickford and Douglas Fairbanks made during the peak of their popularity in the 1920s, and the big epics, from "The Birth of a Nation" (1915) to "Wings" (1927), still exist," Pierce wrote.
"But for every film that survives, there are half a dozen that do not, and for every classic that is seen today, many more of equal importance at the time are now missing and presumed lost," including four films starring silent-movie diva Clara Bow and a 1926 version of "The Great Gatsby."
"The loss of American silent-era feature films constitutes an alarming and irretrievable loss to our nation's cultural record," said Library of Congress chief James Billington, who is tasked under a 1988 law to find ways to preserve US film heritage.
Film director Martin Scorsese, a longtime champion of film preservation, called the artistry of silent film "essential to our culture."
"Any time a silent film by some miracle turns up, it reminds us of the treasures we've already lost," he said. "It also gives us hope that others may be discovered."
The report, titled "The Survival of American Silent Feature Films: 1912-1929," is at www.loc.gov/film.
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"All the features of Buster Keaton, Charles Chaplin and Harold Lloyd, the films Mary Pickford and Douglas Fairbanks made during the peak of their popularity in the 1920s, and the big epics, from "The Birth of a Nation" (1915) to "Wings" (1927), still exist," Pierce wrote.
"But for every film that survives, there are half a dozen that do not, and for every classic that is seen today, many more of equal importance at the time are now missing and presumed lost," including four films starring silent-movie diva Clara Bow and a 1926 version of "The Great Gatsby."
"The loss of American silent-era feature films constitutes an alarming and irretrievable loss to our nation's cultural record," said Library of Congress chief James Billington, who is tasked under a 1988 law to find ways to preserve US film heritage.
Film director Martin Scorsese, a longtime champion of film preservation, called the artistry of silent film "essential to our culture."
"Any time a silent film by some miracle turns up, it reminds us of the treasures we've already lost," he said. "It also gives us hope that others may be discovered."
The report, titled "The Survival of American Silent Feature Films: 1912-1929," is at www.loc.gov/film.
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