The cultural assimilation of Native Americans was an assimilation effort by the United States to transform Native American culture to European–American culture between the years of 1790 and 1920. ... It established Native American boarding schools which children were required to attend.
History of bifocals and trifocals
Benjamin Franklin, the early American statesman and inventor, is credited with creating the first multifocal lens for eyeglasses. Prior to Franklin's invention, anyone with presbyopia had to carry two pairs of eyeglasses — one for seeing distant objects and one for seeing up close.
Balance
It is the tendency of the social system, when disturbed, to return to its original state. This is because change in one element is often accompanied by changes in other related elements.
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This Is the First Known Photograph Ever Taken at a Presidential Inauguration Inauguration of James Buchanan , President of the United States, at the east front of the U.S. Capitol, March 4, 1857. Montgomery C. Meigs Papers—Library of Congress
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