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At the Institute’s core is the Gilder Lehrman Collection, one of the great archives in American history. More than 85,000 items cover five hundred years of American history, from Columbus’s 1493 letter describing the New World through the end of the twentieth century.

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1881

Caravalho, D.N., fl. 1881

Photograph signed

Title: The Edison 150-light dynamo.

Signed by principal lighting engineer, Charles L. Clarke. Depicts generator body with four stacks. Printed text on mount identifies Edison Machine Works as the site of the dynamo's production. Pencil inscription below title reads, "1881." Image is largely faded at bottom and shows signs of staining. See GLC07616.07 for a view of another Machine Works dynamo.

GLC07616.06

1881

Caravalho, D.N., fl. 1881

Photograph signed

Title: The Edison 250-light dynamo.

Signed by principal lighting engineer, Charles L. Clarke. Depicts generator body with six stacks, larger than the 150-light dynamo. Printed text on mount identifies Edison Machine Works as the site of the dynamo's production. Pencil inscription below title reads, "1881." While some parts of the image are faded, most of the dynamo's composite parts appear in clear focus. See GLC07616.06 for the 150-light dynamo.

GLC07616.07

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