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 - Ryan, James (Printed for the Society, 1816)
Goldsmiths'-Kress no. 21424.16. - OCLC, 16780940. - Reproduction of original from Kress Library of Business and Economics, Harvard University