Casgliadau Arlein

Typed in black ink on off-white paper, with 'E.Ivor David' printed in black ink at the top of each page. Two copies, each containing two pages. Full title 'Notes and Comments on Paper - Skip Winding and Mechanised Mining Electrically. By B.L Metcalf and J.Hancock.' Dated 3rd May, 1937. Loose within a beige/light brown file with all other documents with the accession number 83.184I/70. The file is labeled 'Steam and Electric Collieries'.