240 



INDEX 



Measurements QCont.^ : 

 error, normal curve of, 48 

 fluorescence, 127-128 

 gas exchange, 130-142 

 indirect, 51-52 

 length, 34-35 

 light absorption, 120-127 

 of mass, 35-37 

 metric system, 31 

 micromethods, 52 

 null, 32, 33, 114 

 precision of, 48-50 

 pressure, 42 



of radioactive material, 162 

 significant digits, 49-50 

 standards, 30-34 

 of temperature, 38-39 

 theory of, 46-52 

 of time, 37 

 units, 33-34 



volumetric glassware for, 42-46, 50 

 weight, 35-36 

 Mechanists, 13-14 

 Metric system, of measurement, 31 

 Micrometer, 35 

 Microorganisms, for experiments, 70- 



71 

 Microscope. See also Microscopy 

 compound, 83, 84-86, 87, 101 

 electron, 107-109 

 invention of, 13 

 phase contrast, 103-105 

 polarizing, 105-107 

 use of, 101-103 

 "zoom," 93-94 

 Microscopy, 83-109 

 abberations, 98 

 electron, 100, 107-109 

 importance in biology, 83—84 

 magnification, 93—95 

 microscopic methods, 103-109 

 oil immersion, 96, 97, 102-103 

 optical theory, 86-93 

 diffraction, 90-93 

 polarization, 93, 105-107 

 refraction, 89-90 

 phase, 103-105 



Microscopy CCont.^: 



preparation of materials, 99-101 



resolution, 93, 95-98 



use of microscope, 101-103 



Microtome, 97 



Monochromator, 113, 115-116, 117, 

 128, 129 



Monographs, 22—23 



Morgan, T. H., 6l 



N 



National Bureau of Standards, 59 

 Newton's second law of motion, 35 

 Null measurements, 32, 33, 114 



Observation, scientific, 5-7, 8 



Ocular micrometer, 35 



Ohm's law, 32, 174 



Oil immersion microscopy, 96, 97, 102- 



103 

 Organisms, experimental, 33-34, 61- 

 76 

 effects of measurement on, 33-34 

 microorganisms, 70-7 1 

 preparation of, 67-76 

 animals, 68, 69-70 

 plant parts, 68-69 

 selection of, 61-67 

 criteria for, 63-67 

 desirable features, 65-67 

 genetic background, 66 

 separation of parts, 67, 68-69. See 

 also Chromatography 

 Oscilloscopes, 183-184 

 Output transducers, 182-184 

 Oxygen analyzer, magnetic, 142 



Paired design, 215-217 

 Paper chromatography, 148-150, 151, 

 154-155, 156, 169 



