Henry T. De La Beche, Lyon Playfair and Warrington Smyth Reports on the Gases and Explosions in Collieries, William Clowes, 1847, tall quarto, half-morocco, gilt, spine very worn, front hinge cracked; bound with Blackwell Report on Ventilation of Mines, 1850 (title page dust-affected) and Return of all Coals tried at Woolwich and Portsmouth Dockyards, 1858. Complete with all folding plans/diagrams, some hand-coloured, one torn. 171pp