162 



hid ex 



Intensity of electron waves, 22 

 ■ — , optical definition of, 13 

 Interfraction, 135, 148 

 Introduction, 1 



K 



Kikuchi lines, 148 



Lampbrush chromosome, 90 

 Least action of dynamics, principle 

 of, 4 



— time of optics, principle of, 4 

 Length, coherence, 149 



— of wave trains of electrons. See 



Coherence length. 

 Lens astigmatism, elimination of, 



56 

 — , condenser, 31 



— effect of axially symmetrical 



electric field, 6 



— , electrostatic, 7 



— , fixed focus, 38 



— , magnetic type of, 6, 10 



— , objective magnetic, 31 



— , power of electrostatic, 38 



— , projector, 31 



— . short focus, 108 



— , space charge. 111 



- — strength, increasing, 100 



— , undercorrected, 1 1 



— , unipotential. See Fixed focus 

 lens. 



Lenses, electron microscopes with- 

 out, 25 



Light and of electrons, scattering 

 of, 128 



— emission, coherent, 20 



— ray, 16 



— waves, 22 

 Limit, Abbe, 1, 144 

 — , detection, 56 



— of a microscope, resolution, 19 



— of electron microscope, present, 



3 

 ■ — of electron microscopy, ultimate, 

 127 



Limit of optical microscope, resolv- 

 ing power, 1 



— of uncorrected electron micro- 

 scope, detection, 62 



■ — of uncorrected electron micro- 

 scope, resolution, 56 



- — . optimum resolution, 59 



— , reduction of resolution, 100 



Limitations for resolving power, 

 56 



Lines, Kikuchi, 148 



M 



Magnetic field, 113 



— lens, 10 



— lens, electron trajectories in, 8 



— lens, objective, 31 



— microscope, RCA, 65 



— microscope, RCA desk model, 



75 



— objective, 35 



— supermicroscope, 30, 32 



— type of lens, 6 

 Magnetron, static, 110 

 Magnification, chromatic change 



of, 37 



Mechanics, wave, 2 



Method, shadowcast, 93 



Metropolitan Vickers electron mi- 

 croscope, 82 



Microscopy, fluorescence, 48 



Minimum confusion, disc of, 11 



Missing electrons, 147 



Monochromatic illumination, 21 



Monoscope, 95 



N 



Natural unit of action, 16 

 Nature, constant of, 16 

 Negative feedback, 74 

 Non-self-luminous objects, 29 



O 



Objective aperture, physical, 36 



— , magnetic, 35 



— magnetic lens, 31 



