細節
RONALDS, Sir Francis. Descriptions of an Electrical Telegraph, and of some other apparatus, London: Charles Wood for R. Hunter, 1823, 8°, FIRST EDITION, 8 plates, seven engraved, one folding (perforation stamp on title, accession number at foot of 'Advertisement' page, ink stamps on verso of plates, paper browned and brittle, first and last leaf torn with loss to margins), old cloth (worn) -- Alfred VAIL. Description of the American Electro Magnetic Telegraph: now in operation between the cities of Washington and Baltimore. Washington: J. & G. S. Gideon, 1845, 8°, FIRST EDITION, wood-engraved illustrations (perforation stamp on title, acccession number at foot of p.3), later cloth, original upper wrapper mounted on upper cover, original lower wrapper bound-in. Provenance: I. & II. JCL (2)