You are bidding on a high quality photogravure prints dating from 1917. This image depicts the Bosch Seismograph. An interesting article on back discusses the science of volanology and the seismograph measuring instrument.
You are bidding on a print dating from 1917.
This beautiful print has sepia (brown) tone on thick paper. It utilizes a fine random-dot pattern for fluid tones and fine detail (when compared to the more common half-tone processes common today.) There is a detailed story on the back that describes the image.
The page measures approx. 9.25 x 6.75 inches (23.5 x 17.2 cm) with just a narrow margin and a small caption below.
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