First published more than 50 years ago, Henry Dreyfuss’s ‘Symbol Sourcebook’ remains a key text for graphic designers. Emily Orr, associate curator at New York’s Cooper Hewitt Smithsonian Design Museum, explains why it’s the focus of a new exhibition and how symbols have changed over time.

<p>First published more than 50 years ago, Henry Dreyfuss’s ‘Symbol Sourcebook’ remains a key text for graphic designers. Emily Orr, associate curator at New York’s Cooper Hewitt Smithsonian Design Museum, explains why it’s the focus of a new exhibition and how symbols have changed over time.</p>

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