Image: Mining and Scientific Press - 1885-07-18 - Frue and Triump ore concentrators

Description: Adjacent advertisements for two competing ore concentrators of the late 19th century, the Frue Vanner and the Triumph Ore Concentrator.
Title: Mining and Scientific Press - 1885-07-18 - Frue and Triump ore concentrators
Credit: This image or file is extracted from a scan of the Mining and Scientific Press, published by Dewey & Co., San Francisco, California, USA. The original image is on page 59 of the issue dated July 18, 1885, available at the Internet Archive This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information.
Author: Unknown engravers; "copy" (text) likely by the two companies
Permission: 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, 1923. 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. PD-1923 Public domain in the United States //commons.wikimedia.org/wiki/File:Mining_and_Scientific_Press_-_1885-07-18_-_Frue_and_Triump_ore_concentrators.jpg
Usage Terms: Public domain
License: Public domain
Attribution Required?: No