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'Gutta Percha hogar pipes, and speaking tubes in mines : copy of a letter from Ebenezer Rogers, Esq., C.E., F.G.S., Abercarn Fach, near Newport, Monmouthshire' - Details
Gutta Percha hogar pipes, and speaking tubes in mines : copy of a letter from Ebenezer Rogers, Esq., C.E., F.G.S., Abercarn Fach, near Newport, Monmouthshire
