1890 Article Optical Telegraphy Vintage Projecting Lantern Lamp Colonel MAB1 MX7 and escaping the realities of

and escaping the realities of an increasingly industrial era

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Front Street and Erie Avenue Philadelphia

This is an original 1935 black and white print ad promoting the Pfaudler Glass-Lined Steel equipment for Pfaudler Company located at 98 East Avenue

1890 Article Optical Telegraphy Vintage Projecting Lantern Lamp Colonel MAB1 MX7 and escaping the realities ofThis is an original 1890 two page (1 page, double sided) article about the Optical Telegraphy, devised by Colonel Mangin, a French officer. Of the plans proposed by this officer, two were commonly used, one involving the use of lenses; and the other the telescopic system. In the first, the source of the light is a simple petroleum lamp; while the second utilizes the sunlight or electric light. Please see both images. CONDITION This 121+ year old Item