Large plan of longitudinal elevation and cross section of Whitley Bridge Mill produced as Plan 20262 by Henry Simon Ltd, Manchester on 3 August 1906. Scale 1/2" to 1'. Printed on semi-transparent waterproof paper and hand coloured on reverse to show items of different status.
Operation Manual for the Brabender Viscograph supplied by Calibre and possibly dated 14 August 1987. Inserted are Technical Instructions for adjusting settings and for joining separated columns of mercury in the thermometers. A test sheet from Henry Simon is dated 22 June 1978 and a flow chart is dated 27 April 1978