Report on project of the United Comstock Pumping Association for unwatering the North Comstock mines
Subtitle: answering forty-seven questions of Mr. Whitman Symmes
By: A.M. Walsh.
Contributors: United Comstock Pumping Association.
Publisher: Press of Upton Bros. & Delzelle
Published: 1913
Place of publication: Virginia City, Nev
Subjects: Mine drainage.