Answer:
<em>Well, The shift from craft production in small shops and mills to large‐scale industrial production in factories</em>
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<em>was a major factor setting the context of poverty and vulnerability at the start of the 20th century. </em>
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<em>Industrialization progressed rapidly in the United States in the decades after the Civil War. During the</em>
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<em>period running from the 1870s to 1900 that Mark Twain and Charles Dudley Warner christened the</em>
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<em>Gilded Age, progress in science began to interact with technological development, accelerating the pace</em>
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<em>of industrialization still further and making great fortunes for the founders and leaders of large industrial. Hope That Helps!</em>
<em>From Itsbrazts.</em>
Answer:
Glass is the most common material used to construct lens elements, due to its good optical properties and resistance to scratching. Other materials are also used, such as quartz glass, fluorite, plastics like acrylic (Plexiglass), and even germanium and meteoritic glass.
