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BSTJ 3: 1. January 1924: Photomicrography and Technical Microscopy in Its Application to Telephone Apparatus. (Lucas, Francis F.) (1924)
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136 BELL SYSTEM TECHNICAL JOURNAL … Fig. G. Season cracking of aluminum bronze ratchet wheels, (a) Ratchet wheel at magnification 2% X.Specimen · Photomicrography · Technical · Eyepiece · Objective · Magnification · Light · Microscopy · Microscope · Color · Arc lamp · Illuminating train · Technical microscopy · Polarized light · Bell system · Numerical aperture · Resolving power · System technical · Technical journal · Automatic arc
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