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sample of raw industrial grade potassium chloride, in paper envelope

Suria, Catalonia, Spain MANU James Miller, Son and Co. Ltd 1927 79 West Nile St, Glasgow, Scotland From the potash mines of Suria, near Barcelona. Found with 111855, but accompanying letters etc indicate that this is not part of the set. The sample was sent to Prof. Gregory on 3rd May 1927 from James Miller, Son, and Co Ltd. A letter indicates that the material is of lower than normal grade with 8…