A letter from Mr. James Ryan, director of coal mines (late of the Netherton Colliery, near Dudley) on his method of ventilating coal mines - for which he received the gold medal and 100 guineas from the Society for the Encouragement of Arts, Manufactures, and Commerce, Adelphi

Förlag	År	Ort	Om boken	ISBN
Printed for the Society, Printed by R. Wilks	1816	England, London, London	31 sidor., [4] leaves of plates ill., plans 23 cm.