230 



METHODS OF COMMUNICATION FOR FOREST PROTECTION 



Transportation in forest protection, 1,0 



Transposition, 32, 62, 6 



Trimmers, tree, 41 



Tripods, as line supports, 57 



heliograph, 1'69, -170 



Trouble, telephone, guide to clearing, 115*3 

 Trumpet blasts, used as signals, 15 

 Tubes, porcelain, 40, 92 

 Tying-in wire, 68 

 Vibratory signalling, 9<6, 113 

 Volt, definition of, 118 

 Voltmeter test-stations, 142 

 Whistle blasts, used as signals, 15 

 Wigwag codes, Ifld 



signalling with flags, 189 



signals, 14 



Wire, bimetallic, properties of, 224. 



copper, 28, 3'3, 3 1 7, 60, '6)1, 81, 8'3, 92 



copper, properties of, 223' 



copper, specifications for, 2.11 



copper, tensile strength of, 223 



D. F. B. standard, properties of, 226 



emergency, 27, 3'7, 74 



emergency, specifications for, 211. 



galvanized-iron, 23, 28, 33, 36, 59, 69 



galvanized-iron properties of, 224 



galvanized-iron, specifications for, 210 



galvanized steel, properties of, 225 



ground, 9'3 



man-packing of, 46 



rubber-covered, specifications for, 212 



stringing of, 2'9, 60, 7^0 



Wiring, inside building, 9'3 

 outside building, 92 



