Matches in Library of Congress for { ?s ?p The electro magnetic telegraph: with an historical account of its rise, progress, and present condition. Also, practical suggestions in regard to insulation, and protection from the effects of lightning. Together with an appendix, containing several important telegraphic decisions and laws. By Laurence Turnbull.. }
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- 17010919 title "The electro magnetic telegraph: with an historical account of its rise, progress, and present condition. Also, practical suggestions in regard to insulation, and protection from the effects of lightning. Together with an appendix, containing several important telegraphic decisions and laws. By Laurence Turnbull.".