Folder of notes on various polythene subjects

A folder containing notes on polythene entitled 'Polythene - How it was First Made', 'End of an Era', 'I.C.I. Development in Die Face Cutting', 'The Safety of Polythene Reaction Vessels', 'Engineering in the Polythene Project', 'Very High Pressure Studies', 'Reaction Vessels for 2,000 kg/cm2', 'The Strength of Tubes' and 'The Application of Creep Test Data in Design' as well as an ICI Report dated 24th August 1936 entitled 'Proposed Plant for the Production of 100 Tons per Annum of 'Alketh' Containing a Brief Description of the Process Envisaged Some Notes on the Types of Plant Necessary, an Estimate of the Capital Cost and of the Manufacturing Cost'.