Casgliadau Arlein

Handwritten in black ink on off-white, blue lined paper. Four pages of handwritten notes and calculations. There are also two blueprints containing technical drawings glued amongst the notes. Title: 'Calculation of Turbine Discs'. Contained loose within a maroon hardback file with all other documents under accession number 85.184I/4. This document has been wrongly labeled with the accession number 87.20I.4