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.
Bibliographic Details
Main Creator: Ryan, James, Minister for Agriculture.
Format: Book
Language:English
Published / Created: London : Printed for the Society, by R. Wilks, etc., 1816.
Notes:Physical description: [1 v.] (p. 3-32), plates ; 8vo