INDEX 



443 



Signaling, and vacuum tubes, 231 



b: radio, 230 



b? light and sound waves, 47 



hstory of, 221 



ii the war, 221 ff. 

 Smoke, production and use of, 169 

 Sneezing gas, 153 

 Soda lime, in gas warfare, 158 

 Sound-ranging, 41-44 



accuracy of, 84 



development of, 63 ff. 



history of, 66 



principles of, 70 



results of, 87 



Specialization, in research, 405 ff. 

 Squier, Gen. G. O., relation to In- 

 formation Service, 35 

 Ststes Relations, Division of, Na- 

 tional Research Council, 

 423 



Steel, stainless, for airplane en- 

 gines, 260 



Submarine detection, devices for, 

 21 ff., 40-44 



problem, 38 

 Surgery, advances in, 311 ff. 



of chest, 321 



Tank, leak-proof, for airplanes, 



47 ' 

 Telegraph lines abroad, 225 



ground, 243 



Telephone lines abroad, 225 

 Topography, and strategy in the 



war, 190 

 Trade tests, cost of, 382 



in army, 381 



types of, 383 

 Trench foot, 295 

 Trowbridge, A., 63 ff. 



/ 



ignalling. 231 



Vacuum tubes, and signall 

 Vaughan, V. C, 328 ff. 



War neuroses, 291 

 Water, purification of, 281 



supply, and geology, 198 ff. 

 Weather, relations to war, 49 ff. 

 Welch, W. H., 15 

 West, C. J., 148 ff. 

 Wilson, Woodrow, letter, 15 

 Wounds, splinting of, 318 



surgical treatment of, 312 ff. 



Yerkes, R. M., 351 ff. 



