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Original Text (Annotation: EPW019264 / 1400977)

' The National Smelting Company, Avonmouth. Contact process for the manufacture of sulphuric acid. The Avonmouth sulphuric acid plant was designed by the Department of Explosive Supply and erected in 1917 for the Ministry of Munitions by Robert McAlpine & Sons. The units were built in pairs, "left-hand" and "right-hand" and faced each other as in the case of the scrubbing towers,three towers per unit, or individual items of plant per unit placed adjacent to one another as in the converter houses. The buildings are of steel frame construction and clad with corrugated sheeting. Brick, tile, lead and wood were used in the construction of the various items of plant. During the nineteen twenties the sulphur burning contact plant was modified to use zinc roaster gases from the Delplace roasters which was the original intention. '