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August, 1909 "TAE MarRINE REVIEW 287 Transmission of Intelligence on Steam Vessels.' By H. A. Hornor, Electrical Engineer, New York Ship Building Co. OMMUNICATION on divides steam sig- nals for navigational protection vessels itse.£ into from = other craft and means whereby it may securely provide for its own safe carriage of human life hand terior communication to ward off col- and cargo; on the one ex- whistle, siren fog whistle, rockets, etc. Wireless sig- nals, electric flash telegraphy, submarine night signal sets, lights for steam whistle, are carried on many vessels today as a greater factor of safety. The scope of this paper will not permit even a_ brief description of these systems, if indeed Se As a aes Fic, 1.--MeEtTattic THERMOSTAT lision, as well as maintain its own legal course, on the other interior communication for the proper, lawful and safe manipulation of the vessel and the accommodation of her passen- gers, officers and crew. Exterior communications required by law are: Running and .anchor lights, search- lights (in some instances), steam . : "Paper read before the electrical section, Franklin Institute, Philadelphia. Reprinted 'from the Journal of the institute. AND THERMOSTAT ANNUNCIATORS. a brief description could be made, and attention will be addressed solely to the reasons the means of, interior communication on for, and present steam vessels. It is generally known that steam vessels vary greatly in type. There- fore a standard steamship is but the immaterial mind-wanderings of the hopeful ship builder--he who would like to manufacture ships as they do screws, or pens. But it does not oc- cur to many that, other than the vary- ing types, some (particular the vessel usually is for or special service. Thus one might fancy that a number of regard to form, line, propulsion, etc., ships designed exactly alike in and yet for a different service, must, to satisfy this service, be very differ- ently equipped. So passenger and freight shipping, though resembling trans-Atlantic Levi- vessels for our coastwise athans, employ docking telegraphs _be- cause they can more economically and The trans-Atlantic and trans-Pacific vessels, time-sparingly enter their docks. due to their size or due to the docking TRANSMIT- REVOLUTION Exectric Lamp Type. Fic,, 2.--ENGINE TER.