SUBJECT INDEX 
R 
Railroad industry, 16, 194, 251, 
743, 746, 1034, 1046 
economics, 581, 746, 784, 
1031 
Railroad locomotives. See 
“Locomotives”. 
Railroad rails 
tension, 426 
Railroad rolling stock 
movement, 364 
Railroad transportation, 90, 165, 
251, 570, 581, 682, 743, THO, 
S555 MOSH 
Railroad transportation industry, 
1080 
Railroads, 48h, 784 
automation and remote control, 
15, GO, Ik, Set, Ese, 7WMos 
1046, 1080 
construction, 16, 89, 165, 
251, 570, 581, 682, 746, 
784, 852, 1031 
efticiency, 194 
electrification, 16, 251, 570, 
682, 746, 1046, 1080 
materials, 194 
operations, 537 
organization, 581, 746, 784, 
1031 
planning, 89 
trafiic control systems, 900 
Uses GP, MOH, 25, SHO, Stele 
682, 7S, qelhs les, sos 
Rain 
artificially induced, 486, 
1067, 1122 
forecasting, 299, 555 
formation, 299 
physics, 392 
Ramjet engines, 6, 560 
Range finders 
optical, 982 
Rare-earth-element compounds, 
3615) 7/38 
Rare earth elements, 175, 254, 
375, 469, 754, 864, 868 
analysis, 385, 398 
extraction, 326 
minerals, 376 
separation, 994 
R 
Rare-earth metals, 412, 608, 621, 
683 
analysis, 374 
extraction, 412 
production, 994 
separation, 109 
Rare-earth silicates, 336 
Rare-element compounds, 366, 425 
Rare-element minerals, 434 
Rare elements, 267, 330, 333, 434, 
469, 738, 747 
analysis, 377 
chemistry, 557 
products, 522 
Rare-metal compounds, 428 
distillation, 428 
production, 983 
Rare-metal ore deposits, 361, 384, 
Boi 
Rere metals, 71, 146, 222, 323, 
330, 374, 428, keg, 439, 522, 
680, 744 
analysis, 36 
extraction, 316, 428 
production, 557 
Rare-metals industry, 434, 994 
Rational functions, 1130 
Raw-material reserves 
polymetallic, 118 
Raw materials, 302, 329, 435 
Rayon, 759 
Reagent analysis, 54 
Reagents, 31, 54, 333, “lo, 576, 
625 
organic, 994 
Receivers 
beam energy, 462 
Receiving tubes, 970 
Recorders 
sound, 489 
Recording, 93 
Recording instruments 
self-, 198 
Recrystallization, 994 
Recrystallization kinetics, 881 
Rectification columns, 990 
Rectifiers and rectification, 62, 
896 
high-voltage, 832, 896 
power, 48h, 749 
