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 Author:	Ryan, James, director of mines
Format:	eBook
Language:	English
Series:	Making of the modern world (Goldsmiths'-Kress Library of Economic Literature)
Subjects:	Coal mines and mining > Safety measures. Electronic books.
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