BSTJ 3: 1. January 1924: Photomicrography and Technical Microscopy in Its Application to Telephone Apparatus. (Lucas, Francis F.)
This is a 1924 Bell System Technical Journal article by Francis F. Lucas on photomicrography and technical microscopy as applied to telephone apparatus, written for engineers and metallurgists in the telephone industry. The pictures are round-cropped micrographs of porcelain, fibres, metal and a toothed cutter, shown as dark or grey fields of crystals, grains and filaments that suggest textures and patterns for surface and material designers.
