File:Opaque Projector, Bausch & Lomb Optical Co.png

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Captions

Captions

Advertisement for a new opaque projector from 1909

Summary

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Description
English: Advertisement for a projector, of the Bausch & Lomb Optical Co.

The body of the advertisement reads as follows:

Bausch & Lomb New Opaque Projector is proving an invaluable aid in educational work. It is not a toy but a scientific apparatus projecting with brilliancy and even illumination and sharp definition pictures 4x4 1/2 to distances up to 75 feet, dependent upon the lens.
¶ Projection by direct or reflected light at will.
¶ Price of apparatus complete, with lens of ten inch equivalent focus, $70.00
¶ We have also a new combined opaque and lantern slide projector in which the change from one form of projection to the other can be easily and instantaneously made.
¶ Descriptive circular on request.
Date
Source The Popular science monthly
Author Unknown authorUnknown author

Licensing

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Opaque_Projector,_Bausch_%26_Lomb_Optical_Co.png

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