Patent for Apparatus for the Manufacture of Illuminating Gas

Descripción

Patent document, partially filled with manuscript notes; 11 1/2 x 7 1/2; off-white card stock - hand-colored engravings and manuscript notations to recto, specification to verso; two lower corners clipped, obscuring part of a penciled-in word; thin chip with small loss of paper to upper right corner; later typed label to upper left corner; a bit of smudging to margins; overall in good to very good condition.An interesting engineering piece, it was created by one Frederic Egner, a noted engineer from St Louis, MO, who had also worked for the People s Gas Light and Coke Company in Chicago in the early 1880s, consulting, designing, and patenting several other apparatus - for water gas, etc. The current one appeared to have imroved and novel features. Illuminating gas, a mixture of combustible gasses, including methane, carbon oxide, and hydrogen, formed during thermal processing of coal, was widely used for gas lighting through the 19th- and early-20th centuries. N° de ref. del artículo 003198

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