SUBJECT INDEX 



659 



Energy, distribution, beta rays, 524-5 



equivalents (table), 180 



excitation, 557 



ionization, 551 



unit, 540 

 Environmental control, 26-27 

 Enzyme, inactivation, 419, 514, 51G 

 Epi-illuminator, 357-8 

 Equivalent circuits, 235-7, 264-5 



living cells, 264-5 

 Errors, classification, 31-32 



instrumental, 203-4 



interpretation, 205 



probable, 624 



radioisotope measurements, 623-30 



sampling, 204, 626-7 



self-absorption, 627-30 

 Erythema, dose, 456 



sunburn, 441-2 

 Escherichia coli, 499-500, 505-9 

 Exchange reactions, radioisotopes, 632 



stable isotopes, 568, 591-2 

 Excitation, energy, 557 

 Experimental data, accuracy, 29 



analysis, 29-32 



choice of units, 27-28 



environmental control, 26-27 



irradiation studies, 470-3 

 Experimental limitations, instrumenta- 

 tion and technique, 17-18 



theoretical considerations, 15-17 

 Experiments, design, 25-26, 37 



fruitless, 1-38 



negative, 15 



timing, 23-25 

 Extinction coefficient, 423-4 



molecular, 424 

 Eyepiece, 355-6, 374-5. See also 

 Oculars. 



Facts, determined by vote, 32 

 Film badge technique, 641-2 

 Filters, color, 350-3, 364, 434 



color-compensating, 350 



interference, 434 



Polaroid, 362, 374 



X-ray, 461-2 



Fixation, by freezing-drying, 218, 223 



nitrogen, 595 

 Flow method, in calorimetry, 189-93 

 Fluorescence, 349, 363-4, 430 

 Fluorescent specimens, 363-5 

 Fluorite objectives, 350 

 Fourrier's law, 187 



Freezing, biological materials. See 

 Freezing-d riling process and Quick- 

 freezing. 

 Freezing-drying process, accomplish- 

 ments, 226-31 



advantages, 212-4 



applications, 214-9 



equipment, 218-21 



limitations, 221-6 



technique, 221-6 

 Freezing point depression, 56-7 

 Frictional coefficient, 84, 88 

 Frictional ratio, significance, 94 

 Fiirth formula, 124 



Galvanometers, 256-8 

 Galvanometric method (thermo- 

 couples), 144-5 

 Gamma rays, 512. See also Electrons 

 and Ionizing radiations. 



absorption in hydrogen, 555 



absorption in lead, 602-3 

 Gas analysis, mass spectrometry, 570-1 

 Gaussian distribution law, 623-4 

 Geiger counters, background counts. 

 624-6 



end window type, 619-23 



gas refilling, 618-20 



principle, 616-8 



quenching circuits, 617-8 



plateau curve, 617-8 

 Geiger-Mueller counter. See Geiger 



counters. 

 "GM tube," 643. See also Geiger 



counters. 

 Gibbs-Helmholtz equation, 47 

 Glass, heat-absorbing, 373 

 Glycerol, immersion fluid, 364 

 Grid current-voltage curve, 251 

 Grotthus-Draper law, 418 



