Depths shown by bathymetric soundings.
Latitudinal and longitudinal lines.
Prime meridian: London.
Coordinates approximate and based on Greenwich meridian.
Shows telegraph line between Newfoundland and Ireland, as well as the steamship routes between America and Europe.
Decorative border.
Tables: Overland telegraphs of the world -- Submarine telegraphs of the world.
Texts: Account of the invention and operation of the magnetic telegraph -- Decription of making and laying submarine telegraph cables.
Several woodcut illustrations of telegraph machinery (signed: Forbes & Bond ; Wilson N.Y. and Tuttle Eng.), as well as two portraits: Cyrus W. Field, the hero of the enterprise -- Prof. Samuel F. B. Morse.
Profile view: Profile of the Atlantic Ocean on the Telegraph Plate, showing the depth in fathoms.