. Journal. 804 THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. [Oct. 31,1892. Fig. Apparatus for Drying Moist Substances. —15. Improvements in Displacement rumps for Air or otherGases. J. H. Hargreaves and J. G. Hudson, Pat. 12,588, July 8, 1892. The accompanying illustrations show a pump constructed

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882