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["Welwyn," Harold Irving Pratt house, 100 Crescent Beach Road, Glen Cove, New York. Rhododenron at terrace wall]

["Welwyn," Harold Irving Pratt house, 100 Crescent Beach Road, Glen Cove, New York. Rhododenron at terrace wall]



Site History. House Architecture: Georgian revival house by Babb, Cook & Welsh, 1904-1906, with alterations by Delano & Aldrich, mid-1910s. Landscape: Martha Brookes Brown Hutcheson and James Leal Greenleaf, 1911-1913. Associated Name: Harriet Barnes (Mrs. Harold I.) Pratt. Other: Site and drive planning in "Dosoris," the Pratt family compound of houses belonging to the children of Charles Pratt, Frederick Law Olmsted, Jr., E.C. Whiting, Olmsted Brothers, 1906. Today: Gardens in part preserved as Welwyn Preserve, Glen Cove. The house is the Holocaust Memorial & Tolerance Center of Nassau County.
On slide: Unprinted paper mask has the type of gold-border boxes used by slide manufacturer T.H. McAllister-Keller Co., Inc.
Photographed when Frances Benjamin Johnston and Mattie Edwards Hewitt worked together.
Title, date, and subject information provided by Sam Watters, 2011.
Forms part of: Garden and historic house lecture series in the Frances Benjamin Johnston Collection (Library of Congress).

The lantern slides first produced for the 17th century's “magic lantern” devices. The magic lantern, also known by its Latin name Lanterna Magica, an image projector that used pictures on transparent plates (usually made of glass), one or more lenses, and a light source, used for entertainment. The earliest slides for magic lanterns consisted of hand-painted images on glass, made to amuse their audiences. After the invention of photography, lantern slides began to be produced photographically as black-and-white positive images, created with the wet collodion or a dry gelatine process. Photographic slides were made from a base piece of glass, with the emulsion (photo) on it, then a matte over that, and then a top piece of a cover glass. Sometimes, colors have been added by hand, tinting the images. Lantern slides created a new way to view photography: the projection of the magic lantern allowed for a large audience. Photographic lantern slides reached the peak of their popularity during the first third of the 20th century impacting the development of animation as well as visual-based education.





Johnston, Frances Benjamin, 1864-1952, photographer
Hewitt, Mattie Edwards, 1869-1956, photographer

in collections



glen cove


Library of Congress

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