BSTJ 3: 1. January 1924: Photomicrography and Technical Microscopy in Its Application to Telephone Apparatus. (Lucas, Francis F.) (1924)
leaf 29
a circular groove and an optically plain central portion within the groove about 2 n below the plane outside the groove. A drop of the fluid to be examined is placed on this depressed central portion and a cover glass of quartz placed over it. The excess fluid is expelled to the annular groove and… … Fig. 25—Diagram of the rays in a.cardioid condenser. to receive it. The very brilliant illumination resulting from the cardioid condenser would cause glass to fluoresce and for this reason a quartz cell is used. Moreover, glass is more liable to be affected by corroding agents than is quartz. The…
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
Internet Archive · Public domain (published before 1931). Free to use for anything.
