(INDUSTRIAL CYANOTYPES) Select group of 10 rich cyanotypes depicting machinery and the operations at British Thomson-Houston, an engineering and heavy industrial company based at Rugby, Warwickshire, England. Cyanotypes, the images each measuring approximately 7x9 inches (17.8x22.9 cm.), and the reverse, each with numeric notations in the negative, British Thomson-Houston's blind stamp on recto, and a typed caption on verso, and all but one with a company stamp, also on verso. Circa 1920
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