In Three Parts : Containing the Marine Telegraph System, with the Appendix, the United States Telegraph Vocabulary, and Embracing the Holyhead Signals. To which is Annexed the Boston Harbor Signal Book. The Whole Adapted to the Use of the Semaphoric Telegraph, Embracing 30,000 Words, Phrases, and Sentences, Numerically Arranged, for Conversation Between Vessels at Sea, and Communications on Shore, Together with the Designating Numbers of All Vessels that Have Adopted the Marine Telegraph and Holyhead Signals