Wireless Telegraphy and Telephony

XIV LIST OF ILLUSTRATIONS PAGE Fig. 93-—Diagram showing position of loose coupler in circuit 76 Fig. 94 .—Fort Gibbons, Alaska, wireless station ... 77 Fig. 95 .—Transmitting condenser..............................77 Fig. 96 .—Braun’s method for directing wireless telegraph signals.....................................................78 Fig.’97.—Bellini-Tosi radio-goniometer.........................79 Fig. 98 .—Arrangement of Bellini and Tosi for directive wire- less telegraphy.............................................80 Fig. 99 .—Complete receiving and transmitting outfit . . 81 Fig. 100 .—Special lightweight wireless telegraph set for air- ship service................................................83 Fig. 101 .—Telefunken wireless cart, showing transmitter . 84 Fig. 102 .—Telefunken wireless cart for military service . 85 Fig. 103 .—Telefunken wireless wagon set in operation at Fort Leavenworth.................................................86 Fig. 104 .—Wireless room aboard the U. S. transport “Bu- ford” ......................................................88 Fig. 105 . The apparatus set up for operation . . 89 Fig. 106 .—Wireless equipped automobile.......................90 Fig. 107 .—Co. D Signal Corps at San Antonio ... 91 Fig. 108 .—U. S. Signal Corps pack set shown open and closed 92 Fig. 109 .—The receiving apparatus of the airship “America” 93 Fig. no. —Interior of the N. Y. Herald Press station . . 94 Fig. in.—Operating the U. S. Signal Corps airship wireless apparatus...............................................95 Fig. 112 .—The N. Y. Herald station, showing aerial . . 96 Fig. 113 .—Operator Jack Irwin overhauling the wireless ap- paratus for the dirigible balloon “America” ... 97 Fig. 114 .—Morse code........................................98 Fig. 115 .—Continental code...................................99 Fig. 116 .—Transmitting equipment of the high-power station at Nauen...................................................100 Fig. 117 .—Duplex receiving apparatus........................101 Fig. 118 .—Breaking-in system................................102 Fig. 119 .—The receiving apparatus of the station at Nauen 104 Fig. 120 .—Diagram of the ear...............................105 Fig. 121 .—The ossicles......................................106 Fig. 122 .—Bon jour..........................................107 Fig. 123 .—Experiment showing sounding bodies are in vibra- tion ......................................................108