I've had this large size book on the Columbus, Ohio businesses printed in 1895 for some years now. I found it in my garage, and was surprised at how good condition it is still in! This page has a wonderful ad for the Jeffrey Manufacturing Company. Note the reference to: 'Jeffrey Coal Mining Machines and Power Drills'. And further: ' operated by compressed air or electricity and The Jeffrey Electric Hauling System for Coal Mines'. Nice tie in to the wonderful CD 185 Mine insulators.